Question # 1

Surfactants are organic compounds; used in detergents which reduce the

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viscosity of water

surface tension of water

boiling point of water

wetting ability of water

Simplest Structure of a protein that has only covalent bonding between amino acids is

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2° structure

3°structure

1° structure

4° structure

Oxides of sulphur react in atmosphere by various reactions to form:

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sulphates

sulphites

sulphides

sulphate aerosols

It is very much difficult to cook food at Mount Everest, because

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temperature of atmosphere is very low

the boiling point of water is 69°C

water becomes heavier

the boiling point of water is increased

The formation of acetic anhydride from acetic acid follows the mechanism

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SN

AN

SE

AE

At same temperature which substance has high kinetic energy:

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Liquid water

N₂gas in a container

Solid piece of iron

Solution of alcohol and water

The geometry of diamonds is

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tetragonal

cubic

rhombohedral

none of these

In which molecule. all atoms are coplanar?

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CH4

BF3

NH3

PH3

A covalent bond may be

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100% covalent

Partial ionic

100% ionic

Both a and b

Which woody raw material is used for the manufacture of paper pulp?

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cotton

bugases

poplar

rice straw

The value of critical temperature of a gas depends upon its:

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Size

Intermolecular forces in it

Shape

All of above

"Each different compound should have a different name" was published by IUPAC system of nomenclature in

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1892

1830

1947

1979

Soil remediation means

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To make it suitable for cultivation of crops

To make it acidic

To make it alkeline

To add manure into it

The experimental relationship between a reaction rate and the concentration of reactants is known as

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Order

Molecularity

Rate constant

Rate law

Which of the following is a colligative property?

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Melting point

Osmotic pressure

Freezing point

Sublimation temperature

The charge over mass ratio of electron is:

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1.6 x 10^-1 C Kg^-1

9.1 x 10^-31 C Kg^-1

1.7588 x 10¹¹ C Kg^-1

6.62 x 10^-34 C Kg^-1

Which of the followings is not a nulceophile

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OH^-

NH₃

C₂H₅O^-

Br₂

Which of the following has unchanged valency?

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H

Na

Fe

Oxygen

Solutions with same osmotic pressures are called

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Hypertonic

Hypotonic

Isotonic

Normal

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3

4

5

2

N₂3H₂⇌ 2NH₃

_{Which of the following change will favorthe formation of more}NH₃at equilibrium in above reaction :

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By adding NH_3.

By removingH_2.

By decreasing pressure.

By increasing pressure.

The reaction of an alkyl halide with RCOOAg produces

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Ester

Ether

Aldehyde

Ketone

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