IOM 2014 MCQs

Question 1

N-propyl bromide on reduction with alc. KOH gives

Accepted Answer

Propene

Answer

Propane

Answer

Ethane

Answer

Propyne

Question 2

Which has highest knocking property?

Accepted Answer

straight chain olefins

Answer

aromatic hydrocarbons

Answer

branched chain olefins

Answer

heterocyclic compounds

Question 3

Which of the following contains dipole induced dipole interactions?

Accepted Answer

HCl and He

Answer

SiF4 and He

Answer

Cl2 and CCl4

Answer

H2O and C4H5OH

Question 4

The movement of dispersion medium under the influence of electric field is called?

Accepted Answer

electro osmosis

Answer

electrophoresis

Answer

cataphoresis

Answer

polythene

Question 5

Which of the following forms nylon?

Accepted Answer

Polyamide

Answer

Polyster

Answer

poly vinyl chloride

Answer

polythene

Question 6

Which of the following occurs when an electron in an excited state moves to ground state?

Accepted Answer

light is emitted

Answer

atom undergoes spontaneous decay

Answer

energy is absorbed

Answer

charge increases

Question 7

Dehydration is most easiest in case of?

Accepted Answer

Tertiary alcohol

Answer

Secondary alcohol

Answer

Primary alcohol

Answer

CH3OH

Question 8

Covalent character of transition metal increases with

Accepted Answer

increase in oxidation state

Answer

decrease in ionization energy

Answer

decrease in oxidation state

Answer

increase in ionization energy

Question 9

IUPAC name of CH3−O−CH2−CH2−O−CH3 is

Accepted Answer

dimethoxy ethane

Answer

dimethoxy ether

Answer

2-methoxy-3-oxy butane

Answer

2-keto butanoic acid

Question 10

A liquid is found to scatter a beam of light but leaves no residue in a filter paper. The liquid can be described as

Accepted Answer

colloid

Answer

true solution

Answer

oil

Answer

Suspension

Question 11

Two electrons in K shell will differ in ....quantum number

Accepted Answer

spin

Answer

principal

Answer

magnetic

Answer

Azimuthal

Question 12

The third law of thermodynamics helps in finding?

Accepted Answer

absolute entropy

Answer

enthalpy

Answer

internal energy

Answer

free energy

Question 13

A substance follows zero order kinetics if the rate constant is R and the initial concentration is a then the half life will be

Accepted Answer

a/2k

Answer

ak/2

Answer

k/2

Answer

l/ak

Question 14

Peptisation is

Accepted Answer

converting precipitate into colloidal solution

Answer

purification of colloids

Answer

movement of colloidal particles towards the electrodes

Answer

precipitation of colloidal particles

Question 15

Volume of water that should be added to 50mL of 4N HCI to obtain 1N solution is

Accepted Answer

150 ml

Answer

200 ml

Answer

100 ml

Answer

50ml

Question 16

A gas gets decolurises by alkaline KMnO4 solution but does not give precipitate with ammonical AgNO3 solution? not ethye

Accepted Answer

ethylene

Answer

acetylene

Answer

methane

Answer

ethane

Question 17

An ideal gas cannot be liquefied because

Accepted Answer

intermolecular forces are neglible

Answer

critical temperature is low

Answer

intermolecular space is high

Answer

molecules are relatively smaller

Question 18

The compound formed as result of oxidation of ethyl benzene by KMnO4 is

Accepted Answer

benzoic acid

Answer

acetophenone

Answer

benzyl alcohol

Answer

benzophenone

Question 19

Iodoethane reacts with ale KCN followed by complete hydrolysis gives

Accepted Answer

propanoic acid

Answer

ethylamine

Answer

ethanamine

Answer

acetonitrile

Question 20

In the reaction; Ag + H2SO4 → AgSO4 + SO2 + H2O, H2SO4 acts as

Accepted Answer

oxidising agent as well as acid

Answer

reducing agent as well as an acid

Answer

dehydrating agent

Answer

catalyst

Question 21

Which of the following has the highest ionization energy?

Accepted Answer

$1s^2\,2s^2\,2p^3$

Answer

$1s^2\,2s^2\,2p^6\,3s^2\,3p^4$

Answer

$1s^2\,2s^2\,2p^4$

Answer

$1s^2\,2s^2\,2p^6\,3s^2\,3p^3$

Question 22

How many isomeric ethers can be formed from $\mathrm{C_4H_{10}O}$?

Accepted Answer

$3$

Answer

$2$

Answer

$4$

Answer

$5$

Question 23

10 mole of ideal gas at 27°C undergoes isothermal expansion resulting in doubled volume. The work done by the gas (R=1.98 cal) is

Accepted Answer

41.3 x 10³

Answer

4.13 x 10⁵

Answer

4.13 x 10³

Answer

413 x 10³ cal

Question 24

The reactivity order of alkyl halides is

Accepted Answer

RI > RBr> RCI

Answer

RCI > RI > RBr

Answer

RCI > RBr > RI

Answer

RI > RCI > RBr

Question 25

The end product $X$ is: $\mathrm{CH_3COOH}\xrightarrow{\mathrm{NH_3}}A\xrightarrow{\Delta}B\xrightarrow{\mathrm{P_2O_5}}X$

Accepted Answer

acetonitrile

Answer

ethanamide

Answer

acid anhydride

Answer

ethyl amine

Question 26

An electric current of 0.25 ampere was passed through acidified water for 2 hours. What will be the volume of H2 produced at NTP? (1 coulomb of electricity produce 10⁻⁵ gm of water)

Accepted Answer

0.108 l

Answer

0.408 l

Answer

0.216 l

Answer

0.36 l

Question 27

Which intermediate is formed on chlorination of isobutene in presence of peroxide?

Accepted Answer

tert-butyl free radical

Answer

tert-butyl carbocation

Answer

tert-butyl carbanion

Answer

carbene

Question 28

A toothpaste has 0.20g/l fluoride, its concentration in ppm is

Accepted Answer

200

Answer

150

Answer

250

Answer

400

Question 29

During the estimation of halogens, sodium extract is first boiled with nitric acid so as to

Accepted Answer

Decompose NaCN and Na2S

Answer

Increase the solubility of AgNO3

Answer

Make silver halides insoluble

Answer

Dissolve AgCN

Question 30

Two waves each of loudness 'L' superimpose to produce beats. The maximum loudness of beats will be:

Accepted Answer

4L

Answer

L

Answer

2L

Answer

6L

Question 31

The magnification of an astronomical telescope is 5. The power of its eye-piece is +10D. What is the power of its objective lens?

Accepted Answer

+2D

Answer

+4D

Answer

-2D

Answer

+1D

Question 32

A simple pendulum has time period T1 when on earth's surface and T2 when taken to a height R above the earth's surface (where R the radius of the earth) then the value of T2/T1 is

Accepted Answer

2

Answer

4

Answer

√2

Answer

1

Question 33

X ray is produced at 50KV. The minimum wavelength of x ray emitted is:

Accepted Answer

0.25 Å

Answer

2.5 Å

Answer

5 Å

Answer

0.5 Å

Question 34

The correct sequence of electromagnetic wave in decreasing order of frequency:

Accepted Answer

X-ray, visible ray, microwave

Answer

Infra-red, visible ray, UV-ray

Answer

X-ray, visible ray, UV-ray

Answer

microwave, UV-ray, X-ray

Question 35

If 1500 cal of heat is supplied to a system and 1000J of work is done, what is increase in internal energy?

Accepted Answer

4300 J

Answer

2000J

Answer

5000J

Answer

6000

Question 36

A cylinder contains 150cc of ideal gas at 27°C and 650 mm pressure. On constant pressure, the volume of gas at 0°C is:

Accepted Answer

136.5 cc

Answer

130 cc

Answer

140cc

Answer

150cc

Question 37

Two tuning fork A and B sounded together to produce 5 beats. The frequency of B 512 Hz. When fork A is filed and sounded together, the beat frequency increases. The frequency of A is:

Accepted Answer

517Hz

Answer

502Hz

Answer

5.17Hz

Question 38

In electromagnetic wave, orientation of electric and magnetic waves is

Accepted Answer

90°

Answer

0°

Answer

180°

Answer

120°

Question 39

The resultant of two force 3P and 2P is R. If the first force is doubled then the resultant is also doubled. The angle between the force is:

Accepted Answer

120°

Answer

45°

Answer

60°

Answer

90°

Question 40

The velocity of light in a glass of refractive index 1.5 is 2 x 10⁸ m/s. the refractive index of liquid is

Accepted Answer

1.44

Answer

1.2

Answer

0.64

Answer

0.8

13IOM 2014

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