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LU__B.Sc__19042017
LINGAYA’S UNIVERSITY
TIME : 1:30 Hrs.
MM : 60
SAMPLE PAPER - B.Sc. EXAM
PHYSICS
1.
An object of size 10 cm is kept at a distance of 10 cm from a convex lens. If the focal length of
the lens is 5 cm, the size of the image is
(a)
2.
6.
7.
(d) 15 cm
0.1 m
(b)
0.15 m
(c)
0.20 m
(d) 0.30 m
1000 nm
(b)
500 nm
(c)
400 nm
(d) 600 nm
6
(b)
3
(c)

(d) 2 
What is the velocity of light in a medium with refractive index 1.5?
(a)
2  106 m / s
(b)
3  106 m /s
(c)
1.5  106 m / s
(d)
2.5  106 m / s
Which among the following electromagnetic rediations is the most energetic?
(a)
Infra red light
(b)
Visible light
(c)
Ultraviolet light
(d)
Microwaves
Which of the following particles has the shortest de-Broglie wavelength, if all of them move
with same speed?
beta particle
(b)
alpha particle
(c)
proton
(d) neutron
(c)
h/c
(d)
The mass of a photon of wavelength  is given by
(a)
9.
5 cm
A glass plate of thickness 1.5 m and refractive index 1.5 is introduced between one of the slits
and screen in a Young’s double slit experiment. If the wavelength of the monochromatic source
used is  = 0.75 m, the phase difference between the interfering waves at the centre of the
screen is equal to
(a)
8.
(c)
A diffraction grating with
lines/m is used to determine the wavelength of a monochromatic
source. The angle of first order diffraction is 30°. The wavelength of the source is
(a)
5.
20 cm
104
(a)
4.
(b)
A biconvex lens of focal length 10 cm is to be made from a glass material. If the refractive index
of the material is 1.5, what must be the radius of curvature of the surface of the lens?
(a)
3.
10 cm
h  /c
(b)
 / hc
hc / 
The radius of a nucleus with A = 256 is 8 fermi (1 fermi = 1 × 10–15 m). The radius of a nucleus
with A = 4 is
(a)
1 fermi
(b)
2 fermi
(c)
3 fermi
(d) 4 fermi
10. Photons of energy 6 eV fall on the surface of a metal with work function 4 eV. The stopping
potential of the metal surface is
(a)
2V
(b)
10 V
(c)
3V
(d) 1 V
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11. Addition of a minute quantity of phosphorus to a silicon crystal makes it
(a)
am n-type semiconductor
(b)
a bad conductor
(c)
a good conductor
(d)
a p-type semiconductor
12. The electric current in a circuit is given by I  I0 sin  t    . What is the dimension of  ?
(a)
second
(b)
1/second
(c)
mater/second
(d)
dimensionless
13. The velocity varies with time according to the relation, v  3t  4 . The distance travelled by
the body in t = 2 s will be
(a)
10 m
(b)
12 m
(c)
14 m
(d) 16 m
14. When a projectile is at the highest point on its trajectory, the period and kinetic energies are
respectively.
(a)
maximum and minimum
(b)
minimum and zero
(c)
zero and maximum
(d)
maximum and zero
15. A block of mass 2 kg starts moving when the angle of inclination of the inclined plant is 60°. If
the coefficient of kinetic friction is 0.6, the frictional force is
(a)
2N
(b)
1N
(c)
4N
(d) 0.5 N
CHEMISTRY
16. SNI reaction is favored by
(a)
non polar solvents
(b)
more number of alkyl group on the carbon atom attached to the halogen atom
(c)
small groups on the carbon attached to the halogen atom
(d)
no groups on the carbon attached to the halogen atom
17. Phenol is less acidic than
(a)
ethanol
(b)
o-nitrophenol
(c)
o-methylphenol
(d)
o-methoxyphenol
18. Chlora ethane reacts with compound Z to form diethyl ether. Identify Z?
(a)
NaOH
(b)
H2SO4
(c)
C2H2ONa
(d)
Na2C2O3
19. Which of the following reagents may be used to distinguish between phenol and benzoic acid?
(a)
Tollens’ reagent
(b)
Molisch reagent
(c)
Neutral FeCl3
(d)
Aqueous NaOH
20. In the following sequence of reactions, the alkene affords the compound ‘B”.
O2
H2O
CH3 CH  CHCH2 
 A 
B
Zn
The compound B is
(a)
CH2CHO
(b)
CH2COCH3
(c)
CH2 CH2 CHO
(d)
CH2 CH2 COCH3
21. How many chiral carbons are there in   D      glucos e ?
(a)
five
(b)
six
(c)
three
(d) four
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22. Why are contain rubbers called as ‘vulcarized rubber’?
(a)
They are formed under volcanic eruption
(b)
They are prepared by adding 5% of sulphur as cross-linking agent
(c)
They do not use any co-monomer
(d)
By the addition of excessive co-monomer
23. One of the common components of photochemical smog is
(a)
formaldehyde
(b)
acetaldehyde
(c)
methane
(d) CO2
24. Sodium dodecylbenzenesulphomate refers to
(a)
anionic detergent
(b)
soap
(c)
cationic detergent
(d)
nonionic detergent
25. Which one of the following acts as antihistamine?
(a)
Equanil
(b)
Morphine
(c)
Serotonine
(d)
Bromophemulamine
26. The actual atomic weight of an element is represented in
(a)
number
(b)
“u”
(c)
“amu”
(d) “mu”
27. The weight of nascent oxygen in miligrams obtained from 6.32 g of potassium permanganate
(Molecular weight 158) in acid medium is
(a)
16
(b)
0.016
(c)
0.16
(d) 1.6
28. The value of Planck’s constant in units of Js is
(a)
6.626  10 23
(b)
6.626  1027
(b)
6.626  1023
(d)
6.626  1027
29. The mass of proton having a wavelength of 4.2Å is
(a)
4.78  10 33 kg
(b)
4.78  10 32 kg
(c)
7.17  10 32 kg
(d)
2.39  10 32 kg
30. The measurement of a thermodynamic property known as temperature is based on
(a)
zeroth law of thermodynamics
(b)
first law of thermodynamics
(c)
second law of thermodynamics
(d)
kirchoff’s equation
BIOLOGY
31. Calvin cycle include
(a)
carboxylation
(b)
reduction
(c)
regeneration of RuBP
(d)
all
(c)
Regeneration
32. Which process of Calvin cycle requires RuBP?
(a)
Carboxylation
(b)
Reduction
(d) None
33. Reduction process of Calvin cycle requires how many ATP and NADPH for reduction of one
molecule of CO2?
(a) 2 mole ATP and 3 mole NADPH
(b)
2 mole ATP and 2 mole NADPH
(c)
1 mole ATP and 2 mole NADPH
(d)
3 mole ATP and 2 mole NADPH
34. How many mols of ATP is required to regenerate one mole of RuBP?
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(a)
1
(b)
2
(c)
3
(d) 4
35. First stable product of Calvin cycle has
(a)
2 carbon atoms
(b)
3 carbon atoms
(c)
4 carbon atoms
(d)
6 carbon atoms
36. In dark reaction, first reaction is the
(a)
carboxylation
(b)
decarboxylation
(c)
dehydrogenation
(d)
deamidation
37. In C4 plants, CO2 combines with PEP in presence of
(a)
PEP carboxylase
(b)
RuBP carboxylase
(c)
RuBP oxygenase
(d)
hydrogenase
38. Dark reaction of photosynthesis is called so because it
(a)
can also occur in dark
(b)
does not require light energy
(c)
cannot occur during day time
(d)
occurs more rapidly at night
(d)
zero gradient
39. In plants, water moves from
(a)
less negative to more negative gradient
(b)
more negative to less negative gradient
(c)
similar gradient
40. Osmosis involves
(a)
flow of water without a membrane
(b)
flow of solute from a semipermeable membrane
(c)
flow of solvent (H2O) through a semipermeable membrane
(d)
none of the above
41. Root hair absorbs water from soil through
(a)
turgor pressure
(b)
ion exchange
(c)
osmosis
(d) DPD
42. Active transport
(a)
release energy
(b)
requires energy
(c)
produces ATP
(d)
produces a toxic substance
43. Which of the following is true regarding ruttation?
I.
Occurs through stomata
II.
Occurs through hydathodes
III.
Loss of pure water
IV,
Occurs mostly during night and early morning
Correct statements are
(a)
I, II and III
(b)
I and II
(c)
II and IV
(d) I and III
(b)
less than pure solvent
(b)
blockage of xylem
44. Osmotic pressure of a solution is
(a)
(c)
greater than pure solvent
equal to pure solvent
(d)
less than or greater than pure solvent
45. Wilting of plant is due to
(a)
blockage of phloem
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(c)
when some root and phloem are removed
(d)
tracheid is blocked
46. Single stranded DNA is found in :
(a)
tobacco mosaic virus
(b)
Dahlia mosaic virus
(c)
Rous Sarcoma virus
(d)
  174
47. Clear areas in becterial colony caused by phage particles are called :
(a)
bactirio phages
(b)
plasmids
(c)
plaques
(d) prophages
(b)
chlamydomonas
(c)
Penicillium
(d) Nostoc
48. Heterocyst is found in :
(a)
ulothrix
49. Black-wart disease of potato is caused by
(a)
Plasmodiophora brassicae
(b)
Synchytrium endobioticum
(c)
Peronospora viticola
(d)
Puccinia graminis
spore
(c)
protonema
(d) gametophyte
Funaria
(c)
Pteris
(d) marsilea
(c)
Marchantia
(d) funaria
(c)
Pinus
(d) Gnetum
50. The juvenile stage of the moss plant is known as :
(a)
prothallus
(b)
51. False indusium is found in
(a)
Riccia
(b)
52. Horsetail is the common name of :
(a)
Equisetum
(b)
Ophioglossum
53. A gymnosperm having vessel is :
(a)
Cedrus
(b)
Cycas
54. In coconut fruit the milkey water is :
(a)
free nucellar endosperm
(b)
cellular endosperm
(c)
embryo
(d)
non-endospermic tissue
(c)
Pinaceae
55. Resin is obtained from :
(a)
Malvaceae
(b)
Taxaceae
(d) Rosaceae
56. In which of the following categories of plant diseases biological control is used generally :
(a)
soil borne
(b)
insect borne
(c)
water borne
(b)
a helical structure
(d) air borne
57. An ATP is :
(a)
an amino acid
(c)
is a high energy molecule which breaks down to ADA + Pi
(d)
an enzyme
58. The casparian strip is found in :
(a)
within the secondary wall of parenchyma cells
(b)
on four sides of endodermal cell
(c)
between xylem and phloem cells
(d)
between all epidermal cells
59. Fuelgen staining is specific for :
(a)
Protein
(b)
RNA
(c)
Lipids
(d) DNA
(c)
Syntypes
(d) Isotypes
60. Two similar holotypes are called :
(a)
Mesotypes
(b)
Meotypes
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