Question # 1

Critical temperature of argon's gas is low. the reason is that

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it contains four lone pairs

it is mono atomic gas

it has as smell signed

its polarizability is low

Velaric acid is obtained from a herb velarian, its IUPAC name is

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Propionic acid

Pentanoic acid

Butyric acid

Caporic acid

The bonding which occurs among polar covalent molecules containing H and one of the small electronegative element such as O, F or N is called

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bridge bonding

metallic bonding

hydrogen bonding

Ionic bonding

pH of an aqueous solution is 3.0 at 25°C. The hydrogen ion concentration in the solution would be

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0.001

0.01

0.0001

10(-5)

All of the following are simple proteins except

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Histones

Albumin

Keratins

Glycoprotein

The normal amount of overhead ozone is about

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250 Du

300 DU

350 DU

400 DU

Suspended matter is settled in purification of water by:

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aeration

coagulation

chlorination

treatment

The exothermic process is

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Evaporation

Sublimation

Respiration

Boiling

The vapour density of a gas is 11.2.The volume occupied by 11.2 g of this gas at N.T.P is

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22.4 litres

11.2 litres

1 litre

2.24 litres

All of following acids have hydrogen bond in liquid state except:

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nitric acid

sulphuric acid

hydrochloric acid

hydrofluoric acid

Observed pressure of gas on the walls of container is less than actual pressure due to

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Hephazard motion

Inter molecular attractive forces

Elastic collision

Repulsive forces

Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?

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Fullerences

Freons

Polyhalogens

Ferrocene

Vinegar is dilute solution of:

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Acitic acid

Formic acid

Butyric acid

Propionic acid

Number of neutrons in heavy hydrogen atom is

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0

1

2

3

Dehydration of glycerol give

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Propane

Propene

Acrolein

Benzene

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2, 3-dimethylbutane

2, 3-methylbutane

2-dimethylbutane

Dimethylbutane

Oxidation of methyl alcohol gives

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Formaldehyde

Acetone

Ester

Acid

Benzophenone can be converted into benzene using

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Fused alkali

Anhydrous AlCl₃

Sodium amalgam in water

Acidfied dichromate

Which alloy contains 50% copper, 25% zinc and 25% nickel

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German silver

Gun metal

Bell metal

Brass

Which gas is used for welding purposes

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Butane

Nitrogen

Methane

Acetylene

SN₂reaction has order of reaction :

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First

Second

Third

Zero

Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water

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SO₂

NO₂

CO

A and b only

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