Question # 1

Pressure remaining constant, at which temperature the volume of a gas will become twice of what it is at 0°C

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546°C

200°C

546 K

273 K

Considering the physical properties of the gases, which of the following statements about particles of gas is not true. The particles

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orderly arranged

randomly moving

having wide spaces

causing pressure

London dispersion forces are the only force present among the:

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molecules of water in liquid state

atoms of helium in gaseous state at high temperature

molecules of solid iodine

molecules of hydrogen chloride gas

A graph is plotted, P on x-axis and V on y-axis for a given mass at constant temperature, we shall get:

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a curve with different peaks

a curve called isotherm

straight line parallel to x-axis

a straight line

Ice floats on water because

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the hydrogen bonding in ice is stronger than that of in water

empty spaces are left in ice

ice has two-dimensional structure

the bond length of the oxygen and hydrogen bond is different in water and ice

Density of H₂gas at 0°C is 0.09 under 1 atmospheric pressure. The density of O₂gas under the same conditions of temperature and pressure is

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0.36

1.00

1.44

1.18

Ethyl and methyl groups are equidistant in a chain, the preference is given to?

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Ethyl

methyl

both ethyl and methyl

methyl mostly

Which one of the following is not an alicyclic compound?

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Cyclohexene

Cyclohexane

Benzene

Cyclopentane

Which of the following is not a correct postulate of the kinetic theory of gases

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the gas molecules are in random motion

the collision between the molecules are perfectly elastic

the average kinetic energies of different gases are equal at a particular temperature

the pressure exerted on the walls of the container is due to intermolecular forces

Esters have fruity smell and are used as artificial favours. Amyl acetate gives flavour of

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Banana

Jasmine

Pineapple

Orange

For which mechanisms, the first step involved is the same

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E1 and E2

E2 and SN2

E2 and E1

E1 and SN1

Which of the following compounds contains the highest percentage by mass of nitrogen?

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Ammonia, NH₃

Ammonium carbamate, NH₂CO₂NH₄

Ammonium carbonate, (NH₄)₂CO₃

Hydrazine, N₂H₄

Chief source of water and soil pollution is

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Mining

Thermal power plant

Agro-industry

All the above

A chemical inert and heat resistant plastic, that is made form tetrafluoroethlene, is called

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Teflon

PVC

Bakelite

Polyamide

The electropositive elements from

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Acidic oxides

Basic oxides

Neutral oxides

None

If the value of principal quantum number is 3. the total possible values for magnetic quantum number will be

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1

4

9

12

Alkyl halides in which a halogen atom is bonded to that carbon atom which directly bonded with one hydrogen atom is called

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Primary alkyl halides

Secondary alkyl halides

Tertiary alkyl halides

Quaternary alkyl halides

What is the total number of different chloroethanes, formula C₂H_6-nCl_n, where n can be any integer from 1 to 4

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4

6

7

8

Atmosphere of big/metropolitan cities is polluted most by

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Automobile exhausts

Pesticide residue

Household waste

Radio-active fall out

The coinage metals are

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Ni, Pd, Pt

Cu, Ag, Au

Zn, Al, Pb

Fe, Si, Sn

In an ooctahedral crystal field splitting, the number of orbitals pushed down in energy is

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3

2

5

Zero

Each molecule of haemoglobin is 68000 times heavier than one atom of

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C

H

N

O

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