Download Holidays Homework Class XII 2016-17 (1)

Holidays Homework Class XII 2016
PHYSICS
ELECTROSTATICS
1. Write two limitations of Coulomb’s law?
2. What are the unit and dimensions of permittivity of free space?
3. Calculate the electrostatic force between two α - particle at a distance of 2X10-5 m
between them.
4. Why do electric field lines never cross each other?
5. Derive an expression for the electric field at a point on the equatorial line of an electric
dipole?
6. Does an electric dipole always experience a torque, when placed in uniform electric
field? Support your answer with reason?
7. How an electrostatic potential is related to the electric field at a point?
8. No work is done in moving a test charge over an equipotential surface. Why?
9. Derive an expression for the potential energy of an electric dipole in an external uniform
electric field.
10. What is meant by ‘electrostatic shielding’?
11. Derive an expression for the capacitance of a parallel plate capacitor? On what factors
does the capacitance of a parallel plate capacitor depend?
12. Define dielectric constant in terms of the capacitance of a capacitor.
13. In a parallel plate capacitor, how is the capacity affected, when without changing the
charge.
a. The distance between the plates is doubled.
b. Area of the plates is halved.
14. Derive an expression for the energy stored in a parallel plate capacitor with air as the core
material of the capacitor.
15. Two point charges of charge values ‘Q’ and ‘q’ are placed at a distance of x and x/2
respectively from a third charge value 4q, all charges being in the same straight line.
Calculate the magnitude and nature of charge Q, such that the net force experienced by
the charge q is zero.
16. The variation of electric fields of two systems with distance from each is shown in the
graph. Identify nature of each system of charge.
17. Draw electric field lines for
a. Charge q>0
b. Charge q<0
c. Two equal & opposite charges
d. Two equal & similar charges.
18. An electric dipole of length 10cm having charges +6x10-3 C, placed at 30o w.r.t. a
uniform electric field experiences a torque of magnitude 6√3 Nm. Calculate
a. Magnitude of the electric field.
b. The potential energy of the dipole.
19. What is the potential energy of an isolated electric charge?
20. S1 and S2 are two hollow concentric spheres enclosing charges Q and 2Q respectively as
shown in the fig.
a. What is the ratio of electric flux through s1 and s2?
b. How will the electric flux through the sphere s1 change, if a medium of dielectric
constant 3 is introduced in the space inside s in the place of air?
21. A cubical surface encloses a charge of 8.85x10-8C.
a. Calculate the electric flux through one face of the cube.
b. If the charge is enclosed by a spherical surface of radius 7cm, what is the flux through
the spherical surface?
22. If the electric field is given by 6i+3j+4k, calculate the electric flux through a surface of
area 20 units lying in y-z plane.
23. Show graphically variation of electric field due to a charged conducting sphere with
distance and briefly explain it.
24. Explain why the electric field inside a conductor placed in an external electric field is
zero.
25. Two capacitors of capacitances 2µF each are connected first in series and then parallel.
What is the ratio of their capacitances?
26. Calculate the equivalent capacitance between the points A and B in the combination
shown below
Given C1=5µF;
C2=10µF;
C3=15µF;
C4=30µF
27. A parallel plate capacitor with each plate of area A and separation d is charged to a
potential difference V. The battery used to charge it is then disconnected. A dielectric
slab of thickness d and dielectric constant k is now placed between the plates. What
change, if any, will take place in
a. Charge on plates?
b. Electric field intensity between the plates?
c. Capacitance of capacitor.
28. Two parallel plates PQ and RS are kept ‘d’ distance apart. Area of each plate is ‘A’. The
space between them is filled with three dielectrics slab of identical size, having dielectric
constants k1, k2 and k3 respectively as shown below. Find the capacitance of the
capacitor.
29. Two plates of a parallel capacitor are 0.01 meter apart. A dielectric slab of dielectric
constant 6and thickness 0.005m is introduced between the plates parallel to the plates of
the capacitor. Determine the distance between the plates such that the capacitance
remains the same after suitable adjustments of the plates.
CURRENT ELECTRICITY
1. What do you mean by relaxation time of free electrons in metals?
2. Bends in rubber pipe reduces the flow of water through it. How would the bends in a wire
affect the electrical resistance?
3. In an electric kettle, water boils in 20mins after the kettle is switched on. With the same
supply voltage if the water is to boil in 10mins, should the length of the heating element
be decreased or increased?
4. Show a plot of current I through the cross-section of a wire over a time interval of 10s.
Find the amount of charge that flows through the wire during this time period.
5. V-I graph for parallel and series combination of two metallic resistors are shown in
figure. Which graph represents parallel combination? Justify your answer.
6. A potential difference V is applied across a conductor of length L and diameter D. How
are the electric field E and the resistance R of the conductor affected when in turn (i) V is
halved, (ii) L is halved and (iii) D is doubled? Justify your answer in each case.
7. Two identical storage batteries, each having emf ε and internal resistance r, are
connected, as shown in fig. Determine the potential difference set up between the points
A and B.
8. Describe with the help of circuit diagram, how a potentiometer can be used to compare
the e.m.f of two cells.
9. Define resistivity and state its SI unit. State and explain how the resistivity of a conductor
varies with temperature.
10. Two identical cells of emf 1.5V each joined in parallel provide supply to an external
circuit consisting of two resistances of 17Ω each joined in parallel. A very high resistance
voltmeter reads the terminal voltage of cells to be 1.4V. Calculate the internal resistance
of each cell.
11. (a) Three resistors of 1Ω,2Ω and 3Ω are combined in series. What is the total resistance
of the combination?
(b) If the combination is connected to a battery of emf 12V and negligible internal
resistance, obtain the potential drop across each resistor.
12. The variation of potential difference V with length l in case of two potentiometers X and
Y is as shown in the given diagram. Which one of these two will you prefer for
comparing emfs of two cells and why?
13. For the potentiometer circuit, shown in fig., points X and Y represent the two terminals of
an unknown emf ε. A student observed that when the jockey is moved from the end A to
the end B of the potentiometer wire, the deflection in the galvanometer remains in the
same direction. What are the two possible faults in the circuits that could result in this
observation?
If the galvanometer deflection at the end B is (i) more and (ii) less than at the end A,
which of the two faults, listed above, would be there in the circuit? Give reasons in
support of your answer in each case.
14.
In the potentiometer circuit shown in fig,
the balance point is at X.State with
reasons,
Where the balance point will be shifted when
(i ()Resistance R is increased keeping all parameters unchanged (ii)Resistance S is
increased
Ke
eping R
constant.(iii)Cell P is replaced by another cell whose e.m.f is lower than that of cell Q
15.Fig. shows a cell of e.m.f E and internal resistance r, connected to avoltmeter V and a
variable resistance R .Deduce the relationship among V,E R and r. How will V vary when
R is reduced?
CHEMISTRY HOLIDAYS HOMEWORK
1. Select an investigatory Project based on CBSE syllabus. Sketch a rough project report.
2. Revise Chapter 2,3,4,5 and 10 for July Reopening Unit Test.
3. Do the given revision assignment.
CHEMISTRY REVISION ASSIGNMENT
CHAPTER: SOLID STATE
Q1.Why do we not observe frenkel defect in alkali metal halides?
Q2.A metal crystallises into two cubic phases, face centred cubic (fcc) and body centred cubic
(bcc) whose unit cell lengths are 3.5 and 3.0 A0 respectively. Calculate the ratio of densities of
fcc and bcc.
Q3.A compound AB crystallises in bcc lattice with the unit cell edge length of 380 pm. Calculate
(i)
The distance between oppositely charged ions in the lattice.
(ii)
The radius of B- if the radius of A+ is 190 pm.
Q4. Calculate the % of ferrous and ferric ions in Fe0.98O1.00.
CHAPTER: SOLUTIONS
Q1. Explain (i) hemolysis (ii) crenation.
Q2. The molar volume of liquid benzene (density=0.877 g/ml) increases by a factor of 2750 as it
vaporises at 200C and that of liquid toluene (density=0.867 g/ml) increase by a factor of 7720 at
same temperature. A solution of benzene and toluene at same temperature has a vapour pressure
of 46.0 torr . Find the mole fraction of benzene in the vapour above the solution.
Q3. The degree of dissociation of Ca(NO3)2 in a dilute aqueous solution containing 7g of salt per
100g of water is 70% at 100oC.If the vapour pressure of water at 1000c is 760mm Hg, then
calculate the vapour pressure of the solution.
Q4.Arrange the following aq solution ,each of concentration 0.1m, in order of increasing boiling
point .Give reason for your answer.
Ba3(PO4) 2,Na2SO4,KNO3,C6H1206
Q5.Can we separate Azetropes by distillation? Give reason in support of your answer.
Q6.Give reasons
(i) NaCl solution freezes at lower temperature than water but boils at higher temperature than
water.
(ii) Aquatic species feel more comfortable in lakes in winter than in summer.
(iii)Cutting onions kept i4n fridge is more comfortable than cutting onions lying at room
temperatures.
Q7. FeCl3 on reacting with K4Fe(CN)6 in aqueous solution gives blue colour. 0.01 solutions of
these are separated by a semi permeable membrane. Will there be the appearance of blue colour
in side of K4Fe(CN)6 due to osmosis? Give reason.
CHAPTER: ELECTROCHEMISTRY
Q1.The Edison storage cell is represented as
Fe(s)/FeO(s)/KOH(aq)//Ni2O3/Ni(s)
The half cell reactions are
Ni2O3+H2O+2e-↔2NiO(s)+ OHFeO(s)+ H2O+2e-↔Fe(s)+2OH-
E0=+0.40V
E0=-0.87V
(a) What is the cell reaction?
(b) What is the maximum amount of electrical energy that can be obtained from 1 mole of
Ni2O3?
Q2.Calculate the molar conductivity of 1L solution of H2SO4 which is 23% wt/vol.The solution
has an electrolytic conductivity of 0.675 S cm_1.
Q3.. Write Nernst equation and find the E.M.F. of the following cell at 298k
Fe(s)/Fe2+ (0.001M)//H+ (1M)/H2 (g) (1bar)/Pt(s)
Given E0 Fe(s)/Fe2+ =-0.44V
Also find value of standard Gibb’s free energy of the reaction.
Q4. Name any five metals that can be extracted electrolytically.
Q5. The electrical resistance of a column of 0.05 M NaOH solution of diameter 1 cm and length
50 cm is 5.5 X 10 -3 ohm. Calculate its resistivity, conductivity and molar conductivity.
Q6.A voltaic cell is set up at 250C with half cells Al/Al3+ (0.001M) and Ni/Ni2+ (0.50M).Write
equations for the reaction that occurs when cell generates an electric current and determine cell
potential.
Q7.Account for the following:
(i)
(ii)
(iii)
(iv)
(v)
Alkaline medium prevents rusting of iron.
Iron does not rust even if zinc coating is broken in a galvanised iron pipe.
Electrolysis of aqueous NaCl gives hydrogen gas at cathode not molten sodium.
A mercury cell gives a constant voltage throughout its life.
In cold places where salts are added to clear snow, rusting of iron parts of
automobiles become faster.
(vi)
An ordinary pencil cell starts leaking after sometime even if not in use.
Q8. Three iron sheets have been coated separately with three metals A, B and C whose standard
electrode potentials are given below:
Metal
A
Eo value
-0.46V
B
-0.66V
C
-0.20V
Iron
-0.44V
Identify the case in which rusting of iron will be faster if coating is broken.
Q9.Calculate the potential of a zinc-zinc ion electrode in which zinc ion activity is 0.0001M
Eo Zn/Zn2+ =-0.76V.
Q10.What is overvoltage. Explain with an example.
Q11. Name any two metals that can be used for
(i)
(ii)
Anodic protection of iron.
Cathodic protection of iron
CHAPTER: CHEMICAL KINETICS
Q1Define activation energy .What are its uses?
Q2Measurements taken during the reaction CO(g) + NO2(g) → CO2(g) + NO(g)
showed a concentration of carbon monoxide of 0.019 mol L-1 s-1 at 27 min and of 0.013 mol · L-1
s-1 at 45 min. Calculate the average rate, over this 18 min period, of each of the following:
a. the loss of carbon monoxide, CO
b. the gain of carbon dioxide, CO2
Q3.Give reason: why do all molecular collisions do not result in product formation?
Q4Consider the following reaction that occurs between hydrochloric acid, HCl, and zinc metal:
HCl(aq) + Zn(s) → H2 (g) + ZnCl2 (aq)
(a)Will this reaction occur fastest using a 6 M solution of HCl or a 0.5 M solution of HCl?
Explain.
(b)How will increasing the temperature affect the rate of the reaction? Explain
SURFACE CHEMISTRY AND VALUE BASED QUESTIONS
Q1. Smoke is colloidal solution of solid particles such as Carbon, arsenic compounds,dust, etc. in
air. Precipitation of smoke particles coming form the
chimney of factories is carried out by Cottrel Precipitator and Carbon free
air passes out through the chimney.
(a) Name the principle used in the Cottrel Precipitator.
(b) How smoke precepitator causes precipitation and settling of smoke
particles.
(c)Give a industrial application of coagulation of colloids.
(c) Name the value learnt by the use of this Cottrel Precipitator.
Q2. While coming back from school, a student witnesses an accident on road. A person on bike
had suffered injures due to skidding of bike. The student
rushed to the aid of biker with the help of some people, the biker was taken
to a nearby hospital. The student discovered that the bike skidded due to oil
spilled on road. The student arranged for an old cloth and wiped the oil from
the road.
i) Mention the values shown by the student in the above case.
ii) The oil spill can also be washed with soap and water. Explain the cleaning
action of soap.
(iii)What is the difference between associated and multimolecular colloids.
Q3.
(a) Name the process observed when pressure on solution side is more than
osmotic pressure.
(b) Write main use of this process.
(c) Mention the values associated with the above process.
(d)Give two examples of synthetic semi-permeable membranes.
Q4. Raju and his father were going in a boat in the river. Raju’s father threw
away the cell used in watches and hearing aids into the water. Raju
prevented him from doing so.
(a). As a student of chemistry, why would you advise Raju’s father not to
throw the cell in the water body.
(b). What is the value associated with the above decision?
(c).What is the special feature of these cells
(d). Write the overall reaction taking place in the cell.
Q5. After cleaning the refrigerator thoroughly well, Rohit closed it and kept it
switched off for two days. After that on opening it, he got a foul smell. His
neighbour advised him to keep a piece of charcoal in the fridge.
(a). As a student of chemistry explain why?
(b). What value can be drawn from this?
(c)What is activated charcoal?
(d) Mention any two other uses of activated charcoal.
Q6. Ram takes a open pan to cook vegetables at a hill station while shyam cook
the same vegetables in a pressure cooker at the same place.
(a) Explain with reason who will cook vegetable faster.
(b) Mention the reason for the delay in cooking.
(c) Which value is learnt by the student in the process of cooking food in the
pressure cooker.
CHAPTER 10-HALOALKANES AND HALOARENES
Q1) Explain, giving reasons:
a) Why alkyl halides are generally not prepared in the laboratory by free radical halogenations
of alkanes.
b) Vinyl chloride is un-reactive in nucleophillic substitution reactions.
c) tert-butyl chloride reacts with aqNaOH by SN1 mechanism while n-butyl chloride reacts by
SN2 mechanism.
d) Chloroform is kept in closed dark coloured bottles completely filled.
e) Traces of moisture should not be present in Grignard reagent.
f) p-Dichlorbenzene has higher melting point and lower solubility than those of o- and misomers. Discuss.
g) Haloalkanes react with KCN to form alkyl cyanides as major product while AgCN form
isocyanide as the chief product.
h) R—Cl is hydrolysed to R—OH slowly but the reaction is rapid if a catalytic amount of KI is
added to the reaction mixture.
i) Why does 2 bromopentane gives pent-2-ene as major product in elimination reaction?
Q2) Arrange in order of property indicated :
(i)CH3CH2CH2CH2Br, (CH3)3 Br, (CH3)3 CHCH2Br
(Increasing boiling point)
(ii) CH3F, CH3I, CH3Cl, CH3Br
(increasing order of nucleophilic substitution reactions)
Q3) Illustrate the following terms with examples:
(a)Retention (b)Inversion (c)Racemisation
Q4) An optically active compound having molecular formula C4H9Br on treatment with aq
NaOH gives an optically active alcohol C4H9OH .Write the mechanism of the reaction
involved.
Q5) Predict the order of reactivities of following compounds in SN1 reactions
1-chlorocyclohexane, 1-chloro-1-methylcyclohexane,1-bromo-1-methyl-cyclohexane,1chloro-1-methyl-cyclohexane
Q6) Explain the following reactions taking 2-chloroproane as an example:
a) Wurtz reaction
b)Finkelstein reaction
c)Swarts reaction
d)Elimination reaction.
Q7. Write the mechanism of SN2 reaction of chloroethane explaining it in short.
Q8.Carry out the following conversions:
(i) 1-chlorobutane to n-octane
(ii) Bromomethane to propanone
(iii) Chlorobenzene to 1,2 –dichlorobenzene.
Q9.Write structural formula of 2,3-dichloropentane. State wether it is optically active or not.
Also draw the enantiomers, if they exist.
Also do N.C.E.R.T. question numbers 10.1,10.2,10.3,10.11 and 10.16.
Economics
Que.1 Do the given assignments on the chapters given in the introduction, consumers’
equilibrium, Demand, Elasticity of Demand, Supply, Elasticity of Supply, production Function,
Cost and Budget.
Que2. Draw all the graphs and curves with brief explanation.
Que3. Attempt all the six marks questions from the textbook.
English
Que1. Attempt the last year question paper and CBSE sample papers.
Que2. Write a letter to the station master, Anand informing about the loss of your suitcase which
you realized only on alighting at Anand. You travelled by Navjivan Express from Chennai to
Anand. You are Priya/Prasad of 12, Kasturi Bai Street, Chennai 20.
Que3. You are NITIN/ NATASHA, a student of class XII at KPN Public School, Faridabad. The
student is required to cope with a lot of peer pressure in today’s competitive environment. Write
a letter to the editor of a national daily highliting the kind of pressures an adolescent faces and
suggest the ways to cope with same.
Que4. Write a letter to the Manager, Haldirams, Nagpur , requesting him to supply 60 lunch
packets for your excursion party which would be travelling by GT Express from delhi to
Chennai. Your train would reach Nagpur at 12:15 pm. Mention your coach number and other
relevant details. You are Priti/Pritam, Co-ordinator of the excursion Party of Sriram Vidya
Niketan, Delhi.
Que5. Vishal/Veena , a student of class XII of 10 Green Park, New Delhi is interested in learning
Languages. He/she sees an advertisement in the Times of India issued by the “Institute of
Foreign Languages”, New Delhi about the certificate course in Japanese offered by them. He/she
decides to write a letter to the director of the institute seeking more information about the course
duration, working hours.
Que6. You are Suresh /smita. You come across the following advertisement in a national daily.
You consider yourself suitable and eligible for the post. Write an application in response to the
advertisement.
Applications are invited for the post of a Nursery teacher in a reputed School of
Delhi. The candidate must have at least 5 years experience of teaching tiny-tots. The
applicant must have a pleasant personality. He/she should be creative and
innovative. Attractive salary. Interested candidates should apply to the Principal,
AKS International, Indirapuram, New Delhi, and Within 10 days with detailed
resume.
Business Studies-XII
Q1. DO the assignments given for Chapter-1, 2, 3 and 11 in the business studies assignment.
Q2. Prepare the project on Principles of Management or Marketing to be submitted in July for
evaluation in July reopening tests.
Q3. Regularly read newspaper and paste the cuttings in a scrap file or mail it the id:
[email protected] OR [email protected] for ten days. Can also use enewspaper.( only 2 news articles per day).
Accountancy-XII
Q1. Do the assignments based on Ch- 1, 2,4, 5 of book 3 in Accountancy assignment copy.
Q2. Prepare the comprehensive project to be submitted in July for evaluation in July for
evaluation in July reopening tests.
Q3. Regularly read newspaper and paste the cuttings in a scrap file or mail it the id:
[email protected] or [email protected] for ten days. Can also use enewspaper.( only 2 news articles per day).
Q4. Collect the financial statements of a company from the newspaper or the annual report of the
company. XII D will also prepare the project on ratio analysis of the company selected by them
and approved by the teacher concerned. Ratios to be calculated are:- Short term Solvency Ratios(
Current and Liquid Ratios); Long term Solvency Ratios( Debt Equity Ratio and Prop. Ratio);
Profitability Ratios ( Net Profit Ratios and Return on Investment)
Computer science
CONSTRUCTOR AND DESTRUCTOR
[SET – 1]
Question 1
Answer the questions (i) and (iii) after going through the following class:
class Seminar
{
int time;
public:
Seminar()
//Function 1
{
time = 30;
cout << "Seminar starts now" << endl;
}
void lecture()
//Function 2
{
cout << "Lectures in the seminar on" << endl;
}
Seminar(int duration)
//Function 3
{
time = duration;
cout << "Seminar starts now" << endl;
}
~Seminar()
//Function 4
{
cout << "Thanks" << endl;
}
};
i. Write statements in C++ that would execute Function 1 and Function 3 of class
Seminar.
ii. In Object Oriented Programming, what is Function 4 referred as and when
does it get invoked/called?
iii. In Object Oriented Programming, which concept is illustrated by Function 1
and Function 3 together?
Question 2
Answer the questions (i) and (ii) after going through the following class:
class Test
{
char paper[20];
int marks;
public:
Test () // Function 1
{
strcpy (paper, "Computer");
marks = 0;
}
Test (char p[]) // Function 2
{
strcpy(paper, p);
marks = 0;
}
Test (int m) // Function 3
{
strcpy(paper,"Computer");
marks = m;
}
Test (char p[], int m) // Function 4
{
strcpy (paper, p);
marks = m;
}
};
i. Write statements in C++ that would execute Function 1, Function 2, Function 3
and Function 4 of class Test.
ii. Which feature of Object Oriented Programming is demonstrated using
Function 1, Function 2, Function 3 and Function 4 together in the above class
Test?
3
Consider the definition of the following class:
class Sample
{
private:
int x;
double y;
public :
Sample(); //Constructor 1
Sample(int); //Constructor 2
Sample(int, int); //Constructor 3
Sample(int, double); //Constructor 4
};
i. Write the definition of the constructor 1 so that the private member variables
are initialized to 0.
ii. Write the definition of the constructor 2 so that the private member variable x
is initialized according to the value of the parameter, and the private member
variable y is initialized to 0.
iii. Write the definition of the constructors 3 and 4 so that the private
member variables are initialized according to the values of the parameters.
File Handling - Binary File
[SET – 1]
Question 1
Assuming the class EMPLOYEE given below, write functions in C++ to perform
following:
(i) Write the objects of EMPLOYEE to a binary file.
(ii) Read the objects of EMPLOYEE from binary file and display them on screen.
class EMPLOYEE
{
int ENO;
char ENAME[10];
public :
void GETIT()
{
cin >> ENO;
gets (ENAME);
}
void SHOWIT()
{
cout <<ENO << ENAME <<endl;
}
};
Question 2
Assuming the class Computer as follows :
class computer
{
char chiptype[10];
int speed;
public:
void getdetails()
{
gets(chiptype);
cin>>speed;
}
void showdetails()
{
cout<<“Chip”<<chiptype<<“ Speed= “<<speed;
}
};
Write a function readfile( ) to read all the records present in an already existing
binary file SHIP.DAT and display them on the screen, also count the number of
records present in the file.
Question 3
Given a binary file STUDENT.DAT, containing records of the following class
Student type
class Student
{
char S_Admno[lO]; //Admission number of student
char S_Name[30];
//Name of student
int Percentage;
//Marks Percentage of student
public:
void EnterData()
{
gets(S_Admno);
gets(S_Name);
cin>>Percentage;
}
void DisplayData()
{
cout<<setw(12)<<S_Admno;
cout<<setw(32)<<S_Name;
cout<<setw(3)<<Percentage<<endl;
}
int ReturnPercentage()
{return Percentage;}
};
Write a function in C++, that would read contents of file STUDENT.DAT and
display the details of those Students whose Percentage is above 75.
Question 4
Observe the program segment given below carefully and fill the blanks marked as
Statement 1 and Statement 2 using seekg() and tellg() functions for performing the
required task.
#include <fstream.h>
class Employee
{
int Eno;
char Ename[20];
public:
//Function to count the total number of records
int Countrec();
};
int Item::Countrec()
{
fstream File;
File.open("EMP.DAT",ios::binary|ios::in);
______________________ //Statement 1
int Bytes =
______________________ //Statement 2
int Count = Bytes / sizeof(Item);
File.close();
return Count;
}
Question 5
Write a function in C++ to add new objects at the bottom of a binary file
"STUDENT.DAT", assuming the binary file is containing the objects of the
following class.
class STUD
{
int Rno;
char Name[20];
public:
void Enter()
{cin>>Rno;gets(Name);}
void Display()
{cout<<Rno<<Name<<endl;}
};
Question 6
Observe the program segment given below carefully and fill the blanks marked as
Statement 1 and Statement 2 using seekp() and seekg() functions for performing
the required task.
#include <fstream.h>
class Item
{
int Ino;
char Item[20];
public:
//Function to search and display the content from a particular
//record number
void Search(int );
//Function to modify the content of a particular record number
void Modify(int);
};
void Item::Search(int RecNo)
{
fstream File;
File.open(“STOCK.DAT”,ios::binary|ios::in);
______________________ //Statement 1
File.read((char*)this,sizeof(Item));
cout<<Ino<<”==>”<<Item<<endl;
File.close();
}
void Item::Modify(int RecNo)
{
fstream File;
File.open(“STOCK.DAT”,ios::binary|ios::in|ios::out);
cout>>Ino;
cin.getline(Item,20);
______________________ //Statement 2
File.write((char*)this,sizeof(Item));
File.close();
}
ENTREPRENEURSHIP
Project I. Market Survey( 10 Marks)
Students will have to conduct the survey in any one of the below
mentioned topics and follow the guidelines:
A. Conduct a simple market research with the objective of estimating
demand for an existing product in the market. Students will have to give an
innovative suggestion to the product.
B. Conduct a survey for a new innovative product.
C. Conduct a survey for study on
a) Smoking habits
b) Skill Trading Option in an economic backward neighborhood
c) Wearing Helmets
d) Attitudes of Road Users
e) Conservation of Electricity
f) Rainwater Harvesting
ASSIGNMENT
1.
2.
What is the result of applying, knowledge, skill , competency and creativity
strategically for market orientation?
Name the 2 factros that are involved in sensing opportunities.
3.
Explain “Care to ecology and environment” as a social responsibility of an
entrepreneur.
4.
Explain ‘ ability to perceive and preserve basic ideas’ as a factor in the
process of sensing opportunities.
5.
You are an entrepreneur who is deciding the operational plan for your
business. While deciding the technology to be used, you come across three
alternatives:
a) Use a cheaper technology which lets you dispose of the waste water and
lets you fix the price of your product low.
b) Use a technology that is little expensive as it lets you recycle that waste
water into water fit for drinking. In this case you will have a little higher in
order to earn profits.
c) Use the technology that recycles the waste , do not change the price. And
go about cost cutting though efficient utilization of resources.
6.it is the process of entrepreneurship which involves the translation of useful ideas
into an application which has commercial value.
Identify the process.
7.
Shahida a student of school of rug weaving institute, Turkey, visited her
greand parents in Kashmir for the first time . breath taking mountains scenery,
clear lakes, lush vegetations. The valley is home to a rich bio diversity
including a large number of bird species. Kashmiri lifestyle is essentially slow
paced and reflects religions diversity, they are known to enjoy their music
etc.she also observed that govt. Was stable and well guardedby army.
She founded an ideal place for carpet weaving and employ locaql people to
preserve ethnic touch. She started scaaning and collected the following
information,
a) Help her categorize the information making use of Pestel model.
b) Also state a value communicated by shahida.
8.
“ human life is built around work” identify the form of business organisation
being talked about in following sentences:
a) The one man control is best in world, if the man is big enough to manage
everything.
b) Two heads being better than one
c) Self help as well as mutual help system
d) The birth of this legal person is by law AND CAN BE PUT TO DEATH BY
LAW.
9.
WAHT ARE CHANNELS OF DISTRIBUTION? EXPLAIN VARIOUS
FACTORS AFFECTING THESE CHANNELS.
10.
NAME AND EXPLAIN THE PLAN WHICH GIVES DETAILED
INFORMATION REGARDING HUMAN RESOURCE.
BIOLOGY
A. Prepare one investigatory project based on any biological topic .
The topic should not be theoretical only , if required do the field study or
experiments in the laboratory .The written part should not be in form of
printouts, it should be in hand written form.
B. ASSIGNMENT ( Do the question answers )
1. What are the terms used for similar gametes and dissimilar gametes ?
2. In yeast & Amoeba, the parent cell divides to give rise to two new Individual
cells. How does the cell division differ in these two organisms ?
3. What type of organism can be considered as immortal ?
4. Name the type of flower which favours cross pollination .
5. An anther with malfunctioning tapetum often fails to produce
viable male gametophytes . Why ?
6. What is shield-shaped single cotyledon of monocots called ?
7. What is emasculation ? Explain its importance in hybridization .
8. What happens to the blastocyst immediately after implantation ?
9. Meiotic division during oogenesis is different from that in spermatogenesis .
Ex-plain how and why ?
10. Differentiate between morula and blastula .
11. What is amniocentesis ? Why has the government imposed a statutory ban
inspite of its importance in the medical field ?
12. Explain the permanent methods of birth control .
13. What are the factors that contributed to population explosion in India ?
14. What are the symptoms of Klinefelter”s syndrome and Turner”s syndrome ?
15. Explain chromosomal theory of inheritance .
16. The human male never passes on the gene for red-green colour blindness
to his son .How is it so ?
17. What is point mutation ? Give one example .
18. What is splicing ? Why is splicing necessary in eukaryotic genes ?
19. How is VNTR different from a probe ?
20. What are satellite DNA in a genome ?
21. Retrovirus do not follow central dogma .Comment.
22. What was the composition of the primitive atmosphere that favoured
abiotic origin of life on earth ?
23. What is founder effect ?
24. Define biogeography . How do Darwin”s finches provide the biogeographical
evi-dence in favour of evolution ?
25. Explain natural selection with respect to industrial melanism .
MATHEMATICS:
CHAPTER 5 (CONTINUITY AND DIFFERENTIABLITY):
1. NCERT Exemplar’s examples and exercise.
2. Last 5 years board questions.
3. Revision of unit test-1 paper and worksheet given.
CHAPTER 6 (APPLICATION OF DERIVATIVES):
1. NCERT Exemplar’s examples and exercise.
2. Last 5 years board questions.
3. Revision of unit test-1 paper and worksheet given.
CHAPTER 7 (INDEFINITE INTEGRATION):
1. NCERT Exemplar’s examples and exercise.
2. Last 5 years board questions.
3. Revision of unit test-1 paper and worksheet given.