Download summative assessment question paper for class x

SUMMATIVE ASSESSMENT ( I )
Class X
Sub: SCIENCE
Section A
1. You are given with two wires of the same material, one thicker and the
other thinner. Which one has lesser resistivity?
2 Why it is advised that ash and water should not be used to wash
Aluminium vessels?
3. What are wind energy farms?
4. Which one is a chemical change- common salt (Sodium chloride)
added to water or common salt added to lemon juice ?
5. Explain parasitic nutrition with two examples.
6.
Why it is advised that the fried food items has to be kept in air tight
containers once the packets are opened? Give one method to extent the
shelf life of fried items and other items prepared in oil.
7.
(i) Define olfactory indicators
(ii) Which, among the four natural materials given, CANNOT
be used as an Acid- base indicator
a) Red cabbage extract
b) Extract of the flower Hydrangea
c) Extract of the flower Petunia
d) Potato juice
8. A white powder which when made to a paste with water, sets
hard with little expansion and therefore has medical and commercial
applications. Identify the chemical and write its chemical formula. Also
write the chemical formula of the compound from which it is prepared?
9. What types of chemical bonds are formed between?
a) metal atoms and non metal atoms b) non metal atoms and
non metal atoms
10. Differentiate between renewable and non-renewable sources of
energy with one example for each ?
11. What is the use of fuse wire in domestic circuit? How is this connected in
the circuit?
12. A student studies the magnetic effect of current around a current carrying
straight conductor using a magnetic compass and reports the following
(i) the degree of deflection of the magnetic compass increase
when the compass is moved away from the conductor.
(ii) the degree of deflection of the magnetic compass increase
when the current through the conductor is increased.
Which of the above observations of the student appears to be
incorrect and why?
13.
Out of metals and alloys, which one is most suited for
i) connecting wire
ii) heating element
Give one reason each to support your answer
14. List the disadvantages of using biomass as fuel in the
conventional manner. Give two examples of technological input to
improve efficiency of these fuels.
15.
Why Baking soda can be used as
a) an antacid
b) an ingredient of soda- acid fire extinguishers
c) an ingredient of baking powder.
16. a) A person, accidently, has kept a leaking dry cell with its Zinc
coating exposed, on a copper platter. After few days he has
noticed a permanent mark/patch in the platter. Explain the
reason for the observation.
b) Write the balanced chemical equation for the reaction
between Zinc metal and aqueous Copper Sulphate solution.
17. With the help of a diagram explain reflex arc and reflex action
18.
Design an experiment to demonstrate hydrotropism
19.
An insulated copper wire P is connected to a galvanometer. What would
you observe in the deflection of galvanometer when
i) A current carrying coil Q is brought near it?
ii) Strength of the current in coil Q is increased?
Give reason and name the phenomenon involved
20.
a) Quick lime and water are mixed carefully in a beaker and a
thermometer is introduced to the reaction medium. What will
observation? Give the reason for the observation.
b) Give the example of another substance which will give the
same observation when treated with water.
be your
21.
State the law that relates current through a resistor and heat
produced Two bulbs rated 60 W, 200V and 40 W, 200V are
connected in series to a 200 V supply. What will be the
current drawn from the supply line.
22. In the circuit given below, R1, R2 and R3 have values of 12, 6
and 4 respectively and the battery is of 4 V
i) Calculate current in each resistor
ii) Total current
iii) Total resistance
23. Draw diagram of human alimentary canal and label the following
i) Part in which starch digestion starts
ii) Part in which bile is stored
iii) Part in which nutrients are absorbed
iv) Part in which water is absorbed
a) Mention the role of hydrochloric acid in the stomach
b) What function is served by the following
i) Gastric sphincter
ii)
Anal sphincter
OR
a) Draw diagram of respiratory system and label the following
i) Part though which air is taken in
ii) Part which protects the lungs.
iii) Part which carry the air into the lungs
b) What are alveoli? Mention their role in respiration
c) Differentiate between aerobic and anaerobic respiration.
24. a) Name an alloy of Iron which is used to make cooking utensils
b) What is the use of ‘solder’?
c) Which alloy of copper is used for making decorative
materials?
d) Which metal is alloyed with sodium to prepare Sodium amalgum?
e) Why the metals high in the reactivity series cannot be
extracted by the reduction of their ores using the reducing
agents like coke? How these ores are reduced to their
metals?
Or
I.
a) Name a metal which will melt on a hot summer day
b) Name a metal which is not lustrous
c) Name a non metal which is a liquid at room temperature
d) Name a non metal which is a good conductor of electricity
II. Distinguish between electrolytic reduction and electrolytic
refining processes in metallurgy with an example each.
25. What are magnetic field lines? How is the direction of a magnetic field at a
point determined ?
Draw the magnetic field lines of the magnetic field due to a
circular coil of current. State any two methods by which strength of this
field can be increased
OR
Give any two properties of magnetic field lines . Draw the magnetic field
lines of the magnetic field due to a long straight solenoid. State any two
methods by which strength of this field can be increased.
Section B
26. When aqeous solutions of Silver Nitrate and sodium Chloride are
Mixed with each other, a white curdy precipitate is formed due to
a) exothermic reaction
b) combination of reaction
c) displacement reaction
d) double displacement reaction
27.
When a red litmus paper was dipped into a colourless solution,
that felt soapy on touch, given a colour change to blue. The
solution is
a)
Acidic
b) Basic
c)
Neutral
d) Can’t say
28. When a white powder was mixed with dil. HCl, a colourless
odourless gas was produced which can turn lime water milky.
The powder may be
a)
NaOH
b) Na2SO4
c) Na2CO3
d)
NaCl
29. A detergent powder solution which is very irritant to skin is
tested for its pH value. What could be its possible pH
a)
less than 7.5
c)
30.
b) more than 8.5
7
d) Between 5.5 and 7.5
The blue colour of the aqueous Copper sulphate solution can be
changed to colourless by adding sufficient quantity of
a) Iron powder
b) Zinc powder
c) Silver powder
d) Both Zinc and Aluminium powders
31.
The statement that is most correct about the following circuit is
A2
A3
A1
(a) A1 and A2 show the same reading
(b) A2 and A3 show the same reading
(c) A1 and A3 show the same reading
(d) All the ammeters show the same reading
32.
In an electric circuit, three resistors R1, R2 and R3 are connected in series
such that R1=2R2. If V1, V2 and V3 are the voltages across R1, R2 and R3
respectively, then
(a) V1=2V2
33.
(b) V2=2V3
(c) V1=2V3
(d) V1=V2 =V3
For carrying out the experiment, on finding the equivalent resistance of
two resistors connected in parallel, a student sets up the circuit as shown.
On further verification he finds out that he circuit has one or more of the
following faults
A
V
i) The resistors R1 and R2 have not been correctly connected in
parallel
ii) The voltmeter has not been correctly connected in the circuit
iii) The ammeter and key have not been correctly connected in the
circuit
Out of these three , the actual fault in the circuit is/are
a) Both i) and ii)
b) Both ii) and iii)
c)
d)
34.
Only i)
Only ii)
To determine the equivalent resistance of a series combination of two
resistors R1 and R2 , a student arranges the following set up.
A
V
Which of the following statements will be true for this circuit
a) Incorrect reading for current I as well as potential difference V
b) Correct reading for current I but incorrect reading for potential
difference V
c)
Incorrect reading for current I but correct reading for potential
difference V
d)
35.
Correct reading for both current I and potential difference V *
Two students set up their circuits for finding the equivalent resistance of
two resistors connected in series in two different ways as. shown.
Circuit –I
Circuit -II
V
V
A
A
The circuit(s) likely to be labelled as incorrect:
(a) are neither of the two circuits.
(b) is only circuit I.
(c) is only circuit II.
(d) are both the circuits
36. The gas liberated from the germinating seeds during respiration is
37.
a) Oxygen
b) Nitrogen
c) carbon monoxide
d) carbon dioxide
After removing chlorophyll, when iodine test is performed on the
destarched leaf , kept in sunlight for six hours. The expected observation would
be
a)The entire leaf turn blue
b)The covered part of the leaf turns blue
c)The part not covered turns blue
d) The colour of the iodine solution remains same.
38. To observe stomata under the microscope,
a) Peel from upper surface of the leaf is taken
b) Peel from lower surface of the leaf is taken
c) Peel from mid rib portion of the leaf is taken
d) Peel from the growing tip of the onion root is taken
39. The sketch of the stomata given below, the correct set of labeling is
a) 1-guard cell, 11 - stoma. 111—starch grain, IV- nucleus
b) 1-cytoplasm , II- nucleus, III- stoma. IV-chloroplast
c) 1-guard cell. II-stardh grains, III -nucleus. IV-stoma
d) I- Cytoplasm, II-chloroplast, III -stoma, IV-nucleus.
40. In the following experimental set up, KOH solution is essential.
Which statement is not correct?
a) It absorbs CO2 released during the respiration
b) It does not interfere with respiratory activities of the germinating seeds
inside the flask
c) It helps in the rise of level of substance in the beaker
d) It helps in the colour change of the substance kept in the beaker.
41. To make the plant free of starch , it is
a) Kept in darkness for 72 hours
b) Kept in a room , but with lights on at night only
c) Kept under the shade of tree
d) Kept covered with coloured polythene in a shady place.