Question # 1

All of the following are simple proteins except

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Histones

Albumin

Keratins

Glycoprotein

A term to express the partial pressure of water vapours in a gas is known as

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vapour pressure

aqueous tension

partial pressure

moisture

Which one of the following is a powerful electrophile used to attack on the electrons of benzene ring?

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FeCl2

Cl+

FeCl-4

Cl2

NH₃can form only one hydrogen bond per molecule though it has three partially positively charged hydrogens

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nitrogen in NH₃has only one ions pair of electrons which can make one H-bond

ammonia is a base

ammonia is a weak acid

it ionizes to give one H⁺

pi-bond can be formed by sideways overlap of

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s-orbital

d-orbital

p-orbital

sp orbital

Butane molecule can have maximum no of isomers

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2

5

4

3

Primar structure of proteins refers to

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Coling and folding in form of specilie structure

3d structure

Number of amino acids in a chain

Alpha and Beta sheets

Cholesterol is an important precursor in the biosynthesis of

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Adrenal hormones

Sex hormones

Vitamin-D

All of these

A single chloride free radical of CFCs can destroy upto ozone molecules:

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10

100

1000

100000

Reason for the rancidity of fat is

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Low sponification

High reactivity of fat

Oxidation of fat

All

Which of the following human activities are contaminating surface and ground waters?

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pesticides

septic ranks

petroleum and natural gas production

all of these

The total number of d-bock transition element is

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10

14

40

30

In KO₂the oxidation state of oxygen is

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-2

-1

+1/2

-1/2

Acetone reacts with HCN to form a cyanohydrin. It is an example of

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Electrophilic addition

Electrophilic substitution

Nucleophilic addition

Nucleophilic substitution

In the earth crust sodium is

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2.50%

2.30%

2.40%

3.50%

A colourless liquid, at room temperature reacts with soda lime to form sodium salt of carboxylic acid and ammonia gas. The liquids is

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Propanamide

Propanoic acid

Formamide

Methyl Ethanoate

If we remove one hydrogen atom from an alkane we obtain a group called

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Acetyle group

Formyle group

Alkyle group

Ketyle group

Alkyne is :

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CH_3-CH₃

CH₄

CH₂₌CH₂

C₂H₂

Which of the following is a molecular diseases?

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Allergy

Cancer

German measles

Sickle cell anemia

Which reaction is example of nucleophilic substitution

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Which of the following is an aromatic compound

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Propanol

Cyclohexane

Acetone

Benezene

Vegetables oils are:

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Unsaturated fatty acids

Glycerides of unsaturated fatty acids

Essential oils obtained form plants

None of these

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