EASY PSC | Finger Print Searcher

Question 1

What is the actual weight of a body having mass 10 kg ?

A

9.8 N

B

– 9.8 N

C

98 N

D

– 98 N

Question 2

What is the velocity of Radio waves in free space ?

A

3 × 10^8 m.s^–1

B

6 × 10^8 m.s^–1

C

1 × 10^8 m.s^–1

D

2 × 10^8 m.s^–1

Question 3

A half wave rectifier produces 80 watts output power when an a.c. power of 200 watts is applied as input. What is the rectification efficiency ?

A

80%

B

40%

C

2.5%

D

25%

Question 4

Which of the following electromagnetic radiation is used for producing crystal diffraction patterns ?

A

Visible light

B

X-rays

C

Radio waves

D

Infrared radiations

Question 5

The self destruction of an unstabilised transistor by thermal run away is caused by

A

Emitter current

B

Base current

C

Collector current

D

All

Question 6

Oscillator in an electronic circuit is used for

A

Energy conversion

B

Energy production

C

Energy destruction

D

No effect

Question 7

Identify the reason for getting different colours in the case of oil spread over water.

A

Non-uniform thickness

B

Non-uniform inclination

C

Non-uniform thickness and inclination

D

None

Question 8

Where do we find maximum cosmic ray intensity ?

A

Between poles and equator

B

Equator

C

Geomagnetic poles

D

Below sea level

Question 9

Which is the main energy source of sun ?

A

Organic fuels

B

Radiation from other galaxies

C

Fusion reaction

D

Fission reaction

Question 10

Identify the weakest force.

A

Weak nuclear force

B

Strong nuclear force

C

Electromagnetic force

D

Gravitational force

Question 11

A particle is executing simple harmonic motion. What fraction of the total energy is kinetic, if the displacement is 1/2 the amplitude ?

A

1/2

B

0

C

1/8

D

3/4

Question 12

Which among the following is not the unit of time ?

A

Parsec

B

Millisecond

C

Lunar month

D

Solar day

Question 13

Which factor determines the difference between isothermal and adiabatic elasticity ?

A

Ratio of velocities

B

Ratio of densities

C

Ratio of specific heats

D

Ratio of pressures

Question 14

Most probable position of a particle in a box for n = 1 state is at

A

x = 0

B

x = L/4

C

x = L/2

D

x = 3/4 L

Question 15

How much energy is required to knock out an electron from the innermost orbit ?

A

13.6/2 eV

B

13.6 eV

C

27.2 eV

D

0

Question 16

Which observation led to the discovery of deuterium by Harold Urey in 1932 ?

A

Difference in mass

B

Difference in wavelength

C

Difference in field effect

D

Difference in magnetic properties

Question 17

Two charges ‘4e’ and ‘e’ are separated by a distance ‘a’. Where a third charge ‘q’ should be placed to keep the equilibrium ?

A

a/3 from e

B

a/2 from e

C

a/4 from e

D

at e

Question 18

Identify the quark having greatest rest mass.

A

Strange

B

Up

C

Down

D

Bottom

Question 19

Which among the following is a Three-level laser ?

A

He-Ne laser

B

Semiconductor laser

C

Ruby laser

D

Nd : YAG laser

Question 20

Identify the multivibrator which generates square waves of its own.

A

Bistable

B

Astable

C

Monostable

D

ON stable

Question 21

In an adiabatic expansion, let U₁ and U₂ be the internal energies of the initial and final state. Which is the correct expression ?

A

U1 > U2

B

U1 = U2

C

U1 < U2

D

None of the above

Question 22

What is the change in entropy when 341.25 grams of ice at 0°C is converted into water at the same temperature ? latent heat of ice = 80 cal/g.

A

100 cal/g

B

0.01 cal/g

C

27300 cal/g

D

4.266 cal/g

Question 23

What is the average Fermi energy at 0 K ?

A

3/5 EF

B

1/2 EF

C

5/3 EF

D

2/3 EF

Question 24

What is VANTA BLACK ?

A

Vertically aligned nanotube arrays

B

Vertical arrays of nanotube alignment

C

Vertically aligned nanotype arrays

D

Virtually aligned nanotube arrays

Question 25

What happens to the Gibb’s function in a first order phase change ?

A

Decreases

B

Increases

C

Infinite

D

Constant

Question 26

“It is impossible to transfer heat from a cold body to a hot body without doing external work.” This is

A

Planck’s statement

B

Kelvin statement

C

Carnot’s statement

D

Clausius’ statement

Question 27

Biogas produced by the anaerobic decomposition of organic materials

A

Ethane

B

Methane

C

Carbon dioxide

D

Ammonia

Question 28

An electrical device that converts the energy of light directly into electricity

A

Photo detector

B

Laser

C

Photovoltaic cell

D

Maser

Question 29

What is the number of nuclei remaining after ‘n’ half life periods ?

A

N0/2^n

B

N0/4^n

C

N0/0.5^n

D

N0/0.693^n

Question 30

Objects which are comprised of even number of Fermions comes under the category

A

Mesons

B

Bosons

C

Leptons

D

Baryons

Question 31

What is the difference between a zone plate and a convex lens ?

A

Zone plate has one focal length

B

Convex lens has number of foci

C

Both have one focal length

D

Zone plate has number of foci

Question 32

How is the emission of photoelectrons produced ?

A

Elastic collision between a photon and a phonon

B

Elastic collision between a phonon and an electron

C

Inelastic collision between a photon and an electron

D

Elastic collision between a photon and an electron

Question 33

What is the momentum of the gamma ray photon having wavelength 10^–10 m ?

A

h × 10^–10

B

h × 10^10

C

hc × 10^10

D

hc × 10^–10

Question 34

The couple per unit twist for a hollow cylinder and a solid cylinder is C₁ and C₂ respectively. Choose the correct expression.

A

Cl < or = C2

B

C1 < C2

C

C1 = C2

D

C1 > C2

Question 35

Which one contributes maximum to the density of universe ?

A

Visible matter

B

Solids and liquids

C

Dark matter

D

Gases and biomass

Question 36

Large hadron collider is situated at

A

ISRO

B

CERN

C

VSSC

D

INFN

Question 37

‘Little Boy’ is the name of

A

Little planet

B

TNT

C

Hydrogen bomb

D

Atom bomb

Question 38

What is the name given to lines drawn through different places having the same declination ?

A

Isoclinic lines

B

Isenthalpic lines

C

Isogonic lines

D

Isometric lines

Question 39

What is the new resistance of a wire of resistance ‘R’ drawn ‘n’ times its original length ?

A

n^2R

B

nR

C

nR/2

D

2nR

Question 40

Who received Nobel Prize for the discovery of photoelectric effect ?

A

Louis de Broglie

B

Albert Einstein

C

Niels Bohr

D

Max Planck

Question 41

Which of the following molecules have larger bond angle ?

A

NF3

B

PF3

C

AsF3

D

SbF3

Question 42

Among the following iso-electronic ions which have larger ionic radius ?

A

N3–

B

O2–

C

F–

D

Na+

Question 43

Among the following compounds :
(i) CH3 – COOH
(ii) (CH3)2CH – COOH
(iii) (CH3)3C – COOH
(iv) H – COOH
The acidity order is

A

(i) > (ii) > (iv) > (iii)

B

(iv) > (i) > (ii) > (iii)

C

(iv) > (ii) > (i) > (iii)

D

(ii) > (i) > (iii) > (iv)

Question 44

Match the following :
A
(i) lyman series
(ii) Paschen series
(iii) Balmer series
(iv) Pfund

B
(i) Far Infra-red
(ii) Infra-red
(iii) Near Infra-red
(iv) Ultra-violet
(v) Visible

A

(i) – (i), (ii) – (iii), (iii) – (iv), (iv) – (ii)

B

(i) – (iii), (ii) – (i), (iii) – (iv), (iv) – (ii)

C

(i) – (iv), (ii) – (ii), (iii) – (v), (iv) – (i)

D

(i) – (v), (ii) – (iv), (iii) – (iv), (iv) – (ii)

Question 45

How many α and β particles are lost when ₉₂U²³⁸ is converted to ₈₈Ra²²⁶ ?

A

3α-particles and 2β-particles

B

2α-particles and 3β-particles

C

1α-particle and 3β-particles

D

4α-particles and 3β-particles

Question 46

Packing fraction is related to

A

Nuclear spin

B

Mass defect

C

Radioactivity

D

Atomic number

Question 47

Which of the following is the correct order of bond dipole moment ?

A

C-Cl > C-Br > C-I

B

C-I > C-Br > C-Cl

C

C-Cl < C-I < C-Br

D

C-Br < C-I < C-Cl

Question 48

Among the following molecule which has the longest C-H bond length ?

A

Ethene

B

Ethyne

C

Ethane

D

All have same C-H bond length

Question 49

Trimethyl amine is a weaker base than dimethyl amine due to

A

Inductive effect

B

Electromeric effect

C

Resonance effect

D

Steric effect

Question 50

Identify an electrophile.

A

SO2

B

SO3

C

NF3

D

H2O

Question 51

Entropy is a measure of

A

Heat content

B

Free energy

C

Enthalpy

D

Randomness

Question 52

Diels-Alder reaction is an example of which type of reaction ?

A

Electrophilic addition

B

Nucleophilic addition

C

Pericyclic reaction

D

Sigmatropic reaction

Question 53

Compounds HCN and HNC are

A

Tautomers

B

Metamers

C

Functional isomers

D

Conformers

Question 54

Baeyer’s reagent is

A

Aqueous KmnO4 solution

B

1% Alkaline KmnO4 solution

C

Acidic KmnO4 solution

D

Aqueous solution of KmnO4 and K2Cr2O7

Question 55

The compound which does not show Friedel-Craft’s reaction is

A

Chlorobenzene

B

Toluene

C

Nitrobenzene

D

Phenol

Question 56

Which of the following molecule can exhibit geometrical isomerism ?

A

CH3 – CH = CH2

B

(CH3)2C = CH2

C

CH3 – CH = C(CH3)2

D

CH3 – CH = CH – CH3

Question 57

The reagent which may be used to distinguish between starch and cellulose is

A

Tollen’s reagent

B

Iodine solution

C

Acetic anhydride

D

Fehling’s solution

Question 58

The polysaccharide on hydrolysis give only fructose is

A

Cellulose

B

Amylopectin

C

Amylose

D

Inulin

Question 59

Glucose and mannose may be obtained by Kiliani synthesis from

A

d-arabinose

B

d-xylose

C

d-ribose

D

d-lyxose

Question 60

The oxides of nitrogen which is isoelectronic with CO₂ is

A

NO

B

N2O2

C

NO2

D

N2O

Question 61

Gamma rays are

A

Extremely small and fast moving particles of matter

B

High speed positrons

C

Electromagnetic radiations

D

High speed neutrons

Question 62

Among the following which electromagnetic radiation has maximum wavelength ?

A

Ultraviolet

B

Radio waves

C

X-rays

D

Infrared

Question 63

The half-life period of a radioactive element is 140 days. After 560 days, one gram of the element will reduce to

A

1/2 g

B

1/4 g

C

1/8 g

D

1/16 g

Question 64

Splitting of spectral line when atoms are subjected to strong electric field is called

A

Stark effect

B

Zeeman effect

C

Photoelectric effect

D

Decay

Question 65

Which of the following has the largest atomic radius ?

A

Li

B

K

C

Ra

D

Sr

Question 66

Which among the following is the strongest acid ?

A

HF

B

HCl

C

Hbr

D

HI

Question 67

Halogen which shows highest electropositive character is

A

F

B

I

C

Cl

D

Br

Question 68

The gas used for inflating the tires of airplanes is

A

N2 and He

B

H2 and He

C

N2 and H2

D

Ar and He

Question 69

Plaster of Paris is

A

CaSO4.H2O

B

CaSO4.2H2O

C

CaSO4.½ H2O

D

CaSO4.1½ H2O

Question 70

Which of the following compounds has the lowest anion to cation size ratio ?

A

LiF

B

NaF

C

Csl

D

CsF

Question 71

The fingerprint region in the IR spectrum is

A

900 – 1400 cm^–1

B

12500 – 400 cm^–1

C

666 – 50 cm^–1

D

666 – 4000 cm^–1

Question 72

Which of the following is a chromophore ?

A

NH2

B

NO2

C

Br

D

OH

Question 73

When λ_max of a compound shifts to a longer wavelength, the compound is said to have undergone

A

Hypsochromic shift

B

Hyperchromic shift

C

Bathochromic shift

D

None of the above

Question 74

Which of the following is thermosetting plastic ?

A

Perspex

B

Bakelite

C

PVC

D

PVA

Question 75

The acid used in the synthesis of nylon 66 is

A

Formic acid

B

Stearic acid

C

Palmetic acid

D

Adipic acid

Question 76

Which among the following aldehyde undergoes Aldol condensation ?

A

HCHO

B

C6H5 – CHO

C

CH3CHO

D

All the above

Question 77

Which is the correct order of reactivity of alkyl halides in SN2 reaction ?

A

RF > RCl > RBr > RI

B

RF > RBr > RCl > RI

C

RCl > RBr > RF > RI

D

RI > RBr > RCl > RF

Question 78

Which of the following is an intensive property ?

A

Viscosity

B

Mass

C

Volume

D

Internal energy

Question 79

The SI unit of Radioactivity is

A

Curie

B

Rutherford

C

Becquerel

D

Roengten

Question 80

X-rays are used for the study of crystal structure because

A

X-rays are completely absorbed by the crystal

B

The wavelength of X-rays is of the same order of magnitude as the interatomic spacing in crystals

C

The wavelength of X-rays is very small in comparison with the interatomic spacing in crystals

D

The crystals are completely transparent to X-rays

Question 81

Which of the following is a computer code ?

A

UPS

B

IEEE

C

ASCII

D

HTTP

Question 82

What is FTP ?

A

File Translation Process

B

File Transfer Process

C

Folder Transfer Protocol

D

File Transfer Protocol

Question 83

A computer can store data on all of the following devices except

A

Keyboard

B

Floppy disk

C

HDD

D

CD-RW

Question 84

Authentication of any electronic record by means of an electronic procedure is called

A

Two factor authentication

B

Digital signature

C

Biometric authentication

D

Cryptography

Question 85

A markup language used for creating web pages and web applications

A

COBOL

B

HTML

C

PL/1

D

HTTP

Question 86

Choose the output device.

A

Sensors

B

Microphone

C

Scanner

D

Monitor

Question 87

An attack that tricks people into providing sensitive information

A

Ransomware

B

Adware

C

Phishing

D

DOS attack

Question 88

A ________ is a network security system that uses rules to control incoming and outgoing network traffic.

A

Key logger

B

Telnet

C

Spyware

D

Firewall

Question 89

Section 66A of Information Technology Act, 2000 is concerned with

A

Preventing posting of harmful and offensive information

B

Preventing unauthorised access of computer resources

C

Controlling domain name service

D

Controlling internet service providers

Question 90

Which of the following is a Cyber Crime ?

A

Testing

B

Ethical hacking

C

Child grooming

D

Debugging

Question 91

Indian Independence Act, 1947 granted what sort of status to India ?

A

Republic

B

Swaraj

C

Dominion

D

Poorna Swaraj

Question 92

The principle of communal representation in India was first introduced in which Act ?

A

The Indian Council Act, 1909

B

The Indian Council Act, 1861

C

Government of India Act, 1935

D

Indian Council Act, 1892

Question 93

Who said these words about Cripps Proposals : ‘‘Post-dated cheque on a failing Bank” ?

A

Mahatma Gandhi

B

Sardar Patel

C

M. N. Roy

D

G. Ayyangar

Question 94

Under which Act, Union Public Service Commission was formed ?

A

1919 Act

B

1909 Act

C

1858 Act

D

1935 Act

Question 95

When the Constituent Assembly was formed ?

A

1944

B

1946

C

1947

D

1945

Question 96

The emergency powers of the President are modelled on the Constitution from which country ?

A

U.S.A.

B

Germany

C

U.K.

D

South Africa

Question 97

Powers, Privileges and Immunities of Parliament and its members are protected by

A

President

B

Speaker

C

Prime Minister

D

Election Commissioner

Question 98

The final interpreter of the Constitution of India

A

Cabinet

B

President

C

Parliament

D

Supreme Court

Question 99

Which Amendment Act lowered the voting age from 21 to 18 years ?

A

61^st

B

64^th

C

65^th

D

60^th

Question 100

All disputes in connection with elections to Lok Sabha is submitted to

A

High Court

B

Supreme Court

C

Returning Officer

D

Election Commission

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