Question # 1

A peptide having molecular mass of more than 10,000 is called as

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Fat

Vitamin

Carbohydrate

Proteins

In gasses and liquid, temperature is the measure of:

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Average transnational kinetic energies of molecules.

Average vibrational kinetic energies of molecules.

Average rotational kinetic energies of molecules.

None of above.

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

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sulphates

sulphites

sulphides

sulphate aerosols

Alcohol is less acidie than phenol due to

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higher ka value

Instability of alkoxide ion

stability of carbocation

Stability of phenol

The dehydration of ethyl alcohol with concentrated H2SO4 at 140°C gives

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Ethene

Alcohol

Diethyl ether

Carboxylic acid

The particles in solids are

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widely separated and moving randomly

widely separated not moving

moving randomly but not separated

close together and vibrating slightly

Liquids have definite volume due to

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Negligible spaces

Intermolecular force

Motion

Both a and b

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

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)

Which set of elements is good loser of electrons

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F2. Cl2, Br2

N, P. As

O. S, Se

Li, Na, K

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

The reactivity order of alkyl halides for a paricular alkyl group is

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Fluoride > chloride > bromide > iodide

Chloride > bromide > fluoride > iodide

Iodide > bromide > chloride > fluoride

Bromide > iodide > chloride > fluoride

A food chemist wants to create the odour of pineapples for a product. An ester with this odour has the formula C₃H₇COOC₂H_5.Which pair of reagents would produce this ester

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C₂H₅CI and C₃H₇COOH

C₂H₅OH and C₃H₇CONH₂

C₂H₅OH and C₃H₇COOH

C₃H₇OH and C₂H₅COCI

The malt-sugar in the presence of yeast or invertase gives

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Fructose

Glucose

Lignin

Alcohol

The oxidation number of Mn is KMnO₄is

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+2

+4

+6

+7

The oxidation number of Ni in [Ni(CO)₄] is

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+1

0

+4

-4

In CH₄, all the H-C-H bond angles are

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120°

107°

109°

109.5°

The nitration of benzene takes place when it is heated with a mixture of conc.HNO₃and conc. H₂SO₄at 50°C in ratio of

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1 : 2

1 : 1

1 : 3

2 : 1

Steps in SN , reactions are:

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One

Two

Three

Four

The raw materials for the manufacture of urea fertilizer is

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Hydrogen and ammonia

Steam, methane, ammonia

Methane and air

None of these

Phenol is used in the preparation of

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Bakelite

Phenatherene

Cellulose

All of these

Which one of the following gases is used for artificial ripening of fruits

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Ethane

Ethyne

Methane

Propane

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