Question # 1

The main structure features of proteins is

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An ester linkage

An ether linkage

The peptide linkage

All

Which one is not a pollutant normally?

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Hydrocarbons

Carbon dioxide

Carbon monoxide

Sulphur dioxide

White lead is

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Basic lead acetate

Acidic lead carbonate

Basic lead carbonate

Basic lead hydroxide

In crystal structure of sodium chloride, the arrangement of CI^-ions is

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Fcc

Both Fcc and bcc

Bcc

None of these

Evaporation of water is

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An exothermic change

an endothermic change

A process where no heat changes occur

A process accompanied by chemical reaction.

What quantity of limestone (CaCO₃) on heating will give 56 kg of CaO?

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1000 kg

56 kg

44 kg

100 kg

The kinetic theory of gases predicts that total kinetic energy of a gaseous assemble depends on

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Pressure of the gas

Temperature of the gas

Volume of the gas

Pressure, temperature, and volume of the gas.

Which of the following is not present in RNA?

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Uracil

Thymine

Ribose

Phosphate

Which one is the property of an ideal solvent?

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Should be expensive

It should react chemically with the solute

Impurities should crystallize along with the solute

Should be safe to use

Which of the following reaction is used for detecting presence of carbonyl group?

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Reaction with hydroxylamine

Reaction with hydrazine

Reaction with phenyl hydrazine

All

The reagent which forms crystalline osazone derivation when treated with glucose is

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Fehling solution

Phenyl hydrazine

Benedict solution

Hydroxyl amine

As a fixing agent in photography, sodium thisoulphate is used for

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Dissolving out unreacted silver bromide

Converting silver halides to metallic silver

Reducing solubility of AgBr

Preventing overdeveloping and fogging.

Atmosphere of big/metropolitan cities is polluted most by

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Automobile exhausts

Pesticide residue

Household waste

Radio-active fall out

Which one of the halogen acid is a liquid?

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HF

HCl

HBr

Hl

Salol is prepared from

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Salicyclic acid and phenol

Salicyclic acid and methyl alcohol.

Both

None

Benezene is obtained by fractional distillation of

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Heavy oil

Anthracene oil

Middle oil

Light oil

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