Question # 1

For gas obeying Boyle's law if pressure is double, the volume becomes:

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Remains constant.

Double.

One half.

None of above.

Amino acid which synthesized many hormones is

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Valine

Phenylalanine

Alanine

Histidine

How many zones through which charge passes in a rotary kiln.

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3

4

5

6

Surface and ground water sources are contaminated by various human activities which of the followings is not a human activity that causes contamination in fresh water

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live stock waste

oil leaks and spills

disposal of industrial effluents

rain

Aniline is the derivative of the benzene containing the

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Hydroxyl group

Amino group

Amido group

Imido group

The temperature of the gas is raised from 27°C to 927°C the root mean square velocity is

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√927/27 times the earlier value

Same as before

Halved

Doubled

In crystal of sodium chloride, a Cl-1 ion present at the corner of cube is shared between how many cubes?

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8

4

6

10

A molecule of polysaccharide on hydrolysis produces _________ molecules of monosacharides:

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many

Few

2-10

100

Which process of ester will yield carboxylic acid?

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Hydration

Hydrolysis

Oxidation

Reduction

H-bonding is maximum in:

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ethanol

benzene

diethyl ether

water

The weakest intermolecular forces present in a liquid may be

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Dipole-induced dipole forces

dipole-dipole forces

instantaneous forces

electrostatic forces between ions in a ionic solid

Calcium acetate when dry distilled gives

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Formaldehyde

Acetaldehyde

Acetone

Acetic anhydride

How many moles of hydrogen atoms does 3.2 g of methane, CH₄, contain?

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0.02

0.2

0.4

0.8

Formaline Contains ______% alcohol

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80

37

8

52

Which one of the following is not a nucleophile

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H₂O

H₂S

BF₃

NH₃

Cotton is ______% cellulose

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90

100

99

30

Which of the following may affect the rate constant (k) fro a reaction :

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Change in concentration.

Change in pressure.

Change in pH.

Change in temperature.

The electron releasing effect of methyl group is significant and it makes ring a good

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Electrophilic

Nucleophilic

Nucleophobic

Hydrophobic

In Lucas test teriary alcohol make an oily layer

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Immediately

In 10 mins

On heating

Not

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Introduction of an inert gas at constant volume

Introduction of PCl₃(g) at constant

Introduction of PCl₅(g) at constant volume

Introduction of Cl₂at constant volume

Enzymes are chemically

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Carbohydrates

Proteins

Fatty acids

Phospholipids

An excess of aqueous silver nitrate is added to aqueous barium chloride and precipitate is removed by filtration. What are the main ions in the filtrate

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