In ruby laser, the stimulated emission is due to transition from
A
metastable state to any lower state
B
any higher state of lower state
C
metastable state to ground state
D
any higher state to ground state
Question 2Single Answer
A direct current I flows along the length of an infinitely long straight thin walled pipe, then the magnetic field is
A
uniform throughout the pipe not zero
B
zero only along the axis of the pipe
C
zero at any point inside the pipe
D
maximum at the centre and minimum at the edge
Question 3Single Answer
convex lens made of glass has focal length 0.15m in air. If the refractive index of glass is 3/2, and that of water is 4/3 the focal length of lens when immersed in water is
A
0.45 m
B
0.15 m
C
0.30 m
D
0.6 m
Question 4Single Answer
Two sources are said to be coherent if they produce waves
A
having a constant phase difference
B
of equal wavelength
C
of equal speed
D
having same shape of wavefront
Question 5Single Answer
Three resistors 1 Ω, 2 Ω, 3Ω resistor a 3 V battery is connected. The current through 3 Ω resistor is -
A
0.75 A
B
1 A
C
2 A
D
1.5 A
Question 6Single Answer
Temperature can be expressed as derived quantity in terms of
A
length and mass
B
mass and time
C
length, mass and time
D
None of these
Question 7Single Answer
Electron volt is a unit of
A
potential difference
B
charge
C
energy
D
capacity
Question 8Single Answer
Dimensions of impulse are
A
[MLT –1]
B
[MLT²]
C
[MT–2]
D
[ML–1T–3]
Question 9Single Answer
Potential is measured in
A
joule/coulomb
B
watt/coulomb
C
newton–second
D
None of these
Question 10Single Answer
One Nanometer is equal to
A
10–9m
B
10–6m
C
10–10m
D
10–3m
Question 11Single Answer
Maxwell is the unit of
A
magnetic susceptibility
B
intensity of Magnetisation
C
magnetic Flux
D
magnetic Permeability
Question 12Single Answer
Which of the following is derived physical quantity ?
A
Mass
B
Velocity
C
Length
D
Time
Question 13Single Answer
What are the units of magnetic permeability ?
A
Wb A–1 m–1
B
Wb–1 Am
C
Wb A m–1
D
Wb A–1 m
Question 14Single Answer
The dimensions of pressure gradient are
A
[ML–2 T–2]
B
[ML–2 T–1]
C
[ML–1 T–1]
D
[ML–1 T–2]
Question 15Single Answer
The dimensions of Rydberg's constant are
A
[M0L–1T]
B
[MLT–1]
C
[M0 L–1T0]
D
[ML0 T2]
Question 16Single Answer
'Farad' is the unit of
A
resistance
B
conductance
C
capacitance
D
inductance
Question 17Single Answer
S.I. unit of surface tension is
A
degree/cm
B
N/m
C
N/m²
D
Nm
Question 18Single Answer
Which one of the following pairs does not have the same dimension ?
A
Potential energy and Kinetic energy
B
Density and specific gravity
C
Focal length and height
D
Gravitational force and frictional force
Question 19Single Answer
Which one of the following physical quantity has the same unit as that of pressure ?
A
Angular momentum
B
Stress
C
Strain
D
Work
Question 20Single Answer
The symbol of SI unit of inductance is H. It stands for
A
Holm
B
Halogen
C
Henry
D
Hertz
Question 21Single Answer
Light year is a measure of
A
time
B
distance
C
total amount of light falling on the Earth in a year
D
average intensity of light falling on the Earth in a year
Question 22Single Answer
Which one of the following is not a dimension less quantity ?
A
Strain
B
Relative density
C
Frequency
D
Angle
Question 23Single Answer
The dimensions of universal gas constant are
A
[L² M¹ T–2 K–1]
B
[L¹ M² T–2 K–1]
C
[L¹ M¹ T–2 K–1]
D
[L² M² T–2 K–1]
Question 24Single Answer
The dimensions of magnetic moment are
A
[L²A¹]
B
[L²A–1]
C
[L²/A³]
D
[LA²]
Question 25Single Answer
The dimensions of Wien's constant are
A
[ML0TK]
B
[M0LT0K]
C
[M0L0TK]
D
[MLTK]
Question 26Single Answer
The dimensional formula of wave number is
A
[M0L0T–1]
B
[M0L–1T0]
C
[M–1 L–1 T0]
D
[M0 L0 T0]
Question 27Single Answer
The dimensional of Hubble ‘s wave number is
A
[T–1]
B
[M0L0T–2]
C
[MLT4]
D
[MT–1]
Question 28Single Answer
The dimensions of solar constant is
A
[M0L0T0]
B
[MLT–2]
C
[ML²T–2]
D
MT–3
Question 29Single Answer
The dimensional formula for entropy is
A
[MLT–2K¹]
B
[ML2 T-2]
C
[ML²T–2K–1]
D
[ML²T–2K]
Question 30Single Answer
Dimension of specific heat are
A
[ML² T–2 K]
B
[ML² T–2 K–1]
C
[ML²T²K–1]
D
[L²T–2K–2]
Question 31Single Answer
The physical quantity which has the dimensional formula [M¹T–3] is
A
surface tension
B
solar constant
C
density
D
compressibility
Question 32Single Answer
Which one of the following elements is used as a timekeeper in atomic clocks ?
A
Potassium
B
Caesium
C
Calcium
D
Magnesium
Question 33Single Answer
Which one of the following is the value of one nanometer ?
A
10–7 cm
B
10–6 cm
C
10–4 cm
D
10–3 cm
Question 34Single Answer
What is the unit of pressure ?
A
Newton/sq. meter
B
Newton–meter
C
Newton
D
Newton/meter
Question 35Single Answer
The unit of pressure is
A
kg/cm²
B
kg/cm
C
kg/mm
D
kg/cm3
Question 36Single Answer
Which one of the following quantities doe not have unit ?
A
Stress
B
Force
C
Strain
D
Pressure
Question 37Single Answer
Dimensional formula for thermal conductivity is here K denotes the temperature:
A
MLT–2K
B
MLT–2K–2
C
MLT–3K
D
MLT–3K–1
Question 38Single Answer
Which of the following is the unit of molar gas constant ?
A
JK–1 mol–1
B
Joule
C
JK–1
D
J mol–1
Question 39Single Answer
Density of liquid is 16.8 g cm–3. Its value in the International System of Units is
A
16.8 kgm–3
B
168 kgm–3
C
1680 kgm–3
D
16800 kgm–3
Question 40Single Answer
The dimensional formula of couple is
A
[ML² T–2]
B
[MLT²]
C
[ML–1T–3]
D
[ML–2T–2]
Question 41Single Answer
Subtract 0.2 J from 7.26 J and express the result with correct number of significant figures.
A
7.1 J
B
7.06 J
C
7.0 J
D
7 J
Question 42Single Answer
Multiply 107.88 by 0610 and express the result with correct number of significant figures.
A
65.8068
B
65.807
C
65.81
D
65.8
Question 43Single Answer
When 97.52 is divided by 2.54, the correct result is
A
38.3937
B
38.394
C
38.39
D
38.4
Question 44Single Answer
Which of the following is the most accurate ?
A
200.0m
B
20 × 10¹ m
C
2×10²m
D
data is inadequate
Question 45Single Answer
The area of a square is 5.29 cm². The area of 7 such square taking into account the significant figures is:
A
37cm²
B
37.030 cm²
C
37.03 cm²
D
37.0 cm²
Question 46Single Answer
The SI unit of coeffient of mutual inductance of a coil is
A
henry
B
volt
C
farad
D
weber
Question 47Single Answer
The S.I. unit of pole strength is
A
Am²
B
Am
C
Am–1
D
Am–2
Question 48Single Answer
Which is dimensionless ?
A
Force/acceleration
B
Velocity/accerleration
C
Volume/area
D
Energy/work
Question 49Single Answer
The expression [ML–1T–2] does not represent
A
pressure
B
power
C
Stress
D
Young's modulus
Question 50Single Answer
The dimensional formul of current density is
A
[M0L–2T–1Q]
B
[M0L2T1Q–1]
C
[MLT–1Q]
D
[ML–2T–1Q²]
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Chemistry
Question 51Single Answer
10-6 M NaOH is diluted 100 times. The pH of the diluted base is
A
between 7 and 8
B
between 5 and 6
C
between 6 and 7
D
between 10 and 11
Question 52Single Answer
In the electrolysis of acidulated water, it is desired to obtain 1.12 cc of hydrogen per second under STP condition. The current to be passed is
A
1.93 A
B
9.65 A
C
19.3 A
D
0.965 A
Question 53Single Answer
The one which decreases with dilution is
A
molar conductance
B
conductance
C
specific conductance
D
equivalent conductance
Question 54Single Answer
Vapour pressure of pure ‘A’ is 70 mm of Hg at 25oC. It forms an ideal solution with ‘B’ in which mole fraction of A is 0.8. if the vapour pressure of the solution is 84 mm of Hg at 25oC, the vapour pressure of pure ‘B’ at 25oC is
A
28 mm
B
56 mm
C
70 mm
D
140 mm
Question 55Single Answer
A 6% solution of urea is isotonic with
A
1 M solution of glucose
B
0.05 M solution of glucose
C
6% solution of glucose
D
25% solution of glucose
Question 56Single Answer
Which of the following is not a synthetic fibre:
A
Anygora
B
Rayon
C
Nylon
D
Polyster
Question 57Single Answer
Which one of the following is not contained in Portland cement ?
A
Ca3Al2O6
B
Ca3SiO5
C
Ca2SiO4
D
Ca3(PO4)2
Question 58Single Answer
What is the reson for white cement to be white ?
A
It does not contain carbon
B
It does not contain silicon
C
It does not contain iron
D
It does not contain calcium
Question 59Single Answer
Which fertilizer is assimilated directly by the plant ?
A
Super phosphate
B
Nitrolim
C
Muriate of Potash
D
Humus
Question 60Single Answer
Which of the following chemicals is used in foam fire extinguishers ?
A
Aluminium sulphate
B
Copper sulphate
C
Cobalt sulphate
D
Nickel sulphate
Question 61Single Answer
What is a mixture of potassium nitrate, powdered charcoal and sulphur called ?
A
Glass
B
Cement
C
paint
D
Gun powder
Question 62Single Answer
Which one of the following chemicals is used in beauty parlours for hair – setting ?
A
Sulphur based
B
Phosphorus based
C
Silicon based
D
Iron based
Question 63Single Answer
Which one of the following is used as a mordant in dyeing and tanning industry ?
A
Magnesium oxide
B
Magnesium carbonate
C
Magnesium chloride
D
Magnesium sulphate
Question 64Single Answer
Which one of the following substances is used in the manufacture of safety matches ?
A
Red phosphorus
B
White phosphorus
C
Phosphorus trioxide (P2O3)
D
Black phosphorus
Question 65Single Answer
Which one of the following polymeric materials is used for making bullet proof jacket ?
A
Nylon –6, 6
B
Rayon
C
Kevlar
D
Dacron
Question 66Single Answer
Which one of the following is another name of RDX
A
Cyanohydrin
B
Dextran
C
Cyclohexane
D
Cyclonite
Question 67Single Answer
Which one of the following is used as an explosive ?
A
Phosphorus trichloride
B
Mercuric oxide
C
Graphite
D
Nitroglycerine
Question 68Single Answer
Flint glass is obtained from which of the following ?
A
Zinc and barium borosilicate
B
Sand, red lead and potassium carbonate
C
Sodium aluminium borosilicate
D
Pure silica and zinc oxide
Question 69Single Answer
Which one of the following correctly defines the state of glass ?
A
Crystalline solid
B
Super cooled liquid
C
Condensed gas
D
Liquid crystal
Question 70Single Answer
Which one of the following is not used as fertilizer ?
A
Ammonium nitrate
B
Ammonium sulphide
C
Ammonium phosphate
D
Ammonium sulphate
Question 71Single Answer
Which one of the following elements is needed in the human body to transfer electrical signals by nerve cells ?
A
Lithium
B
Sodium
C
Rubidium
D
Caesium
Question 72Single Answer
Which one of the following is NOT true for bleaching powder ?
A
It is used as a reducing agent in chemical industries
B
It is used for bleaching wood pup in paper factories
C
It is used for disinfecting drinking water
D
It is used for bleaching linen in textile industry
Question 73Single Answer
Hard glass having the same ingredientsas soft glass excepts.
A
hard glass have Na in place of K
B
hard glass having K in place of Na
C
hard glass having both Na and K
D
None of the above
Question 74Single Answer
A complete fertilizer provides
A
N,P, K
B
S, K, N
C
S, B, K
D
N, S, P
Question 75Single Answer
Antacids are commonly used to get rid of acidity in the Stomach. A commonly used antacid is.
A
sodium hydrogen phthalate
B
magnesium hydroxide
C
calcium hydroxide
D
manganese acetate
Question 76Single Answer
Annealing of glass is done to.
A
make it brittle
B
make it opaque
C
make it transparent
D
None of the above
Question 77Single Answer
Petrochemicals are obtained from.
A
coal
B
petroleum
C
coal tar
D
All of these
Question 78Single Answer
The use of chemicals for treatment of diseases is called as.
A
isothermotherapy
B
angiotherapy
C
physiotherapy
D
chemotherapy
Question 79Single Answer
Which of the following is a hypnotic drug ?
A
luminal
B
salol
C
catechol
D
chemisol
Question 80Single Answer
Teflon is a polymer of which of the following monomers ?
A
Tetrafluoroethylene
B
Vinyl chloride
C
Acetylene dichloride
D
None of the above/More than one of the above
Question 81Single Answer
LPG used as domestic fuel chiefly contains–
A
Methane
B
Propane
C
Ethylene
D
Butane
E
None of the above/More than one of the above
Question 82Single Answer
Glass is a.
A
liquid
B
colloid
C
non–crystalline amorphous solid
D
crystalline solid
Question 83Single Answer
Which one of the following acids is used for etching glass ?
A
H2SO4
B
HNO3
C
HF
D
HCI
Question 84Single Answer
What is the purpose of adding plasticizers in paint manufacturing process ?
A
They act as a film–forming constituent
B
They reduce the viscosity
C
They prevent the polymerization and condensation
D
They provide elasticity to the film and minimize its cracking
Question 85Single Answer
Which raw material is used in the preperation of soft glass ?
A
K2CO3, SiO2, CaCO3
B
K2CO3, SiO2, PbCO3
C
Na2CO3, SiO2, CaCO3
D
Na2CO3, SiO2, PbO
Question 86Single Answer
What is the composition of nitrolim – a chemical fertilizer ?
A
Nitrogen and limestone
B
Calcium carbide and nitrogen
C
Calcium carbide and carbon
D
None of above
Question 87Single Answer
the major component used in preparation of different type of glasses is.
A
Silica
B
Sodium borate
C
Calcium silicate
D
Sodium silicate
Question 88Single Answer
Salts of which of the following elements provide colours to fireworks ?
A
Zinc and sulphur
B
Potassium and mercury
C
Strontium and barium
D
Chromium and nickel
Question 89Single Answer
Given below are two statements :
Statement I : Phenyl is used as a household germicide.
Statement II : Phenyl is phenol derivative and phenol is an effective germicide.
In the light of the above statement, choose the correct answer from the options given below:
A
Both Statement I and II are correct and Statement II is the correct explanation of Statement I
B
Both Statement I and Statement II are true but Statement II is NOT the correct explanation of Statement I
C
Statement I is correct, but Statement II is incorrect
D
Statement I is incorrect, but Statement II is correct
Question 90Single Answer
Given below are two statements :
Statement I : Coal–based thermal power stations contribute to acid–rain.
Statement II : Oxides of carbon are emitted when coal burns.
In the light of the above statement, choose the correct answer from the options given below:
A
Both Statement I and II are individually correct and Statement II is the correct explanation of Statement I
B
Both Statement I and Statement II are individiaully correct but Statement II is not the correct explanation of Statement I
C
Statement I is correct, but Statement II is incorrect
D
Statement I is incorrect, but Statement II is correct
Question 91Single Answer
Terfenadine is commonly used as a/an.
A
transquilizer
B
antihistamine
C
antimicrobial
D
antibiotic
Question 92Single Answer
Which one of the following is not a tranqualizer ?
A
Equanil
B
Veronal
C
Salvarsan
D
Serotonin
Question 93Single Answer
Barbituric acid and its derivatives are well known.
A
antipyretics
B
analgesics
C
antiseptics
D
tranquilizers
Question 94Single Answer
Which one among is not an analgesic ?
A
Ibuprofen
B
Naproxen
C
Aspirin
D
Valium
Question 95Single Answer
Various phenol derivatives, tincture of iodine (2 – 3%) I 2 in (water/alcohol) and some dyes like methylene blue are.
A
antiseptics
B
disinfectants
C
analgesics
D
antipyretics
Question 96Single Answer
Commonly used antiseptics 'Dettol' is a mixture of.
A
o–chlorophenozylenol + terpeneol
B
o–cresol + terpeneol
C
phenol + terpeneol
D
chloroxylenol + terpeneol
Question 97Single Answer
Which of the following is not an antiseptic drug ?
A
Iodoform
B
Dettol
C
Gammexene
D
Genatian violet
Question 98Single Answer
Which one of the following substances is made from natural raw materials ?
A
Rayon
B
Nylon
C
Polyster
D
Polystyrene
Question 99Single Answer
The polymeric fibre used as a substitute for wool in making synthetic blankets, sweaters, etc. is.
A
nylon
B
teflon
C
orlon
D
bakelite
Question 100Single Answer
The cleaning of dirty clothes by soaps and detergents is deue to a type of molecules called surfactants, which are present in soaps and detergents. The surfactant molecules remove the dirt by.
A
making the cloth slippery
B
producing some gases between the dirt and the cloth
C
dissolving the dirt
D
forming some aggregates of themselves and take away the dirt in the core of the aggregates
Biology
Question 101Single Answer
Plant viruses usually contain :
A
RNA
B
DNA
C
DNA and RNA
D
DNA or RNA
Question 102Single Answer
Viruses were discovered by :
A
Stanley
B
Ivanowski
C
Twort
D
Herelle
Question 103Single Answer
Which statement best defines viruses?
A
Acellular infectious agents that replicate only inside living host cells
B
Cellular microorganisms containing only DNA
C
Free-living microorganisms capable of independent metabolism
D
Cellular microorganisms containing only RNA
Question 104Single Answer
Which infectious agents consist essentially of small, naked RNA molecules without a protein coat?
A
Virions
B
Prions
C
Viroids
D
Bacteriophages
Question 105Single Answer
Coliphage f X 174 contains :
A
double stranded RNA
B
single stranded DNA
C
double stranded DNA
D
single stranded RNA
Question 106Single Answer
Viruses differ from living organisms in that, they :
A
can grow inside a living host
B
can multiply inside a living host
C
can undergo mutation inside a living host
D
are non-cellular
Question 107Single Answer
Virus which attacks E.coli is called :
A
bacteriophage
B
coliphage
C
phytophage
D
zoophage
Question 108Single Answer
Which characteristic distinguishes viruses from cellular organisms?
A
They possess ribosomes for protein synthesis
B
They have independent energy metabolism
C
They are acellular and depend on host cells for replication
D
They reproduce by binary fission
Question 109Single Answer
The genome of a temperate bacteriophage integrated into the bacterial chromosome is termed as?
A
Prophage
B
Episome
C
Plasmid
D
Capsomere
Question 110Single Answer
Virus was crystallized and isolated first by :
A
J.D. Ivanowski
B
F.C. Bawden
C
W.M. Stanley
D
K.M. Smith
Question 111Single Answer
Little leaf disease of brinjal is primarily associated with which pathogen?
A
Phytoplasma
B
Begomovirus
C
Fungus
D
Viroid
Question 112Single Answer
Which approximate size range includes many of the smallest known conventional virus particles?
A
20–30 nm
B
100–150 nm
C
500–700 nm
D
1–2 µm
Question 113Single Answer
Which of the following is devoid of protein coat, with a constitution of RNA only ?
A
Tobacco mosaic virus
B
Poxvirus
C
Potato spindle tuber virus
D
None of the above
Question 114Single Answer
Genetic modification brought about by a virus in a bacteria is known as :
A
transformation
B
transduction
C
conjugation
D
candidiasis
Question 115Single Answer
Which property makes the classification of viruses as strictly living or non-living problematic?
A
They reproduce independently outside cells
B
They possess cellular organelles but lack DNA
C
They replicate in host cells but are metabolically inactive outside them
D
They perform independent respiration outside host cells
Question 116Single Answer
Influenza viruses contain which type of genetic material?
A
Double-stranded DNA
B
Single-stranded RNA
C
Single-stranded DNA
D
Double-stranded RNA
Question 117Single Answer
Edward Jenner is best known for pioneering vaccination against which disease?
A
Smallpox
B
Chickenpox
C
Rabies
D
Poliomyelitis
Question 118Single Answer
Roux Sarcoma virus contains :
A
RNA
B
DNA
C
DNA and RNA
D
None of these
Question 119Single Answer
Which of the following is a viral disease of potato ?
A
Early blight of potato
B
Late blight of potato
C
Leaf roll of potato
D
None of the above
Question 120Single Answer
The term Virus' has been derived from a Latin word meaning :
A
poison
B
secretion
C
cell
D
venom
Question 121Single Answer
Which of the following is an example of DNA containing plant virus ?
A
Tobacco mosaic virus
B
Potato mosaic virus
C
Cauliflower mosaic virus
D
Tomato mosaic virus
Question 122Single Answer
Rabies is caused by :
A
viruses
B
slime moulds
C
fungi
D
bacterium
Question 123Single Answer
A clear area produced when bacteriophages lyse bacterial cells growing on a culture medium is called a?
A
Plaque
B
Colony
C
Streak
D
Capsule
Question 124Single Answer
An antiviral substance produced by many vertebrates in response to viral infection for resisting the multiplication of viruses is known as :
A
antivirin
B
antigen
C
virion
D
interferon
Question 125Single Answer
Viruses with two types of symmetry, i.e., icosahedral head and helical tail are called :
A
picornaviruses
B
binal viruses
C
riboviruses
D
none of these
Question 126Single Answer
What generally happens to contractile-vacuole activity when a freshwater Amoeba is transferred to a sufficiently hypertonic saline solution?
A
It increases rapidly
B
It remains unchanged
C
It decreases markedly or may cease
D
The vacuole divides repeatedly
Question 127Single Answer
What is the median adhesive pad located between the two terminal claws of a cockroach leg called?
A
Unguis
B
Arolium
C
Tibial spur
D
Cercus
Question 128Single Answer
The binomial system of Carolus Linnaeus was devoid of which of the following categories ?
A
Genus and species
B
Class and order
C
Phylum and family
D
Kingdom and class
Question 129Single Answer
The mouthparts of a cockroach are adapted primarily for which mode of feeding?
A
Biting and chewing
B
Piercing and sucking
C
Siphoning
D
Sponging
Question 130Single Answer
Which mosquito is the biological vector responsible for natural transmission of human malaria?
A
Male Culex
B
Female Culex
C
Female Aedes
D
Female Anopheles
Question 131Single Answer
Amniota group includes :
A
Aves and Reptiles
B
Pisces, Amphibia and Reptiles
C
Amphibia, Reptiles and Aves
D
Reptiles, Aves and Mammalia
Question 132Single Answer
Which combination correctly represents the principal mouthparts of a cockroach?
A
Labrum, mandibles, first maxillae, labium and hypopharynx
B
Labrum, antennae, tibia, labium and cerci
C
Mandibles, antennae, femur, maxillae and labium
D
Labrum, wings, mandibles, hypopharynx and tibia
Question 133Single Answer
In a typical winged insect, the two pairs of wings are borne on which thoracic segments?
A
Prothorax and mesothorax
B
Mesothorax and metathorax
C
Prothorax and metathorax
D
Prothorax and first abdominal segment
Question 134Single Answer
Which is true ?
A
Pisces, Reptiles and birds are poikilotherms
B
Pisces, Amphibians and Reptiles are Anamniota
C
Aves, Mammals and Reptiles are homeotherms
D
Reptiles, Aves and Mammais are Amniota
Question 135Single Answer
Which sequence correctly represents the general forward flow of haemolymph through the dorsal vessel of a cockroach?