Question # 1

Water is purified by:

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Filtration

aeration

coagualation

All of these

Which is unnecessary for purification of water for drink purposes:

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coagulation

aeration

treatment with lodine

treatment with chlorine

Butane has isomeric forms

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3

4

2

1

Which of the following is woody raw material used for making pulp and paper:

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Eucalyptus

Bagasse

Wheat straw

Cotton linter

Helical structure of protein is stabilized by

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Peptide bond

Dipeptide bond

Van der wall's forces

Hydrogen bonding

Which of the following has isomorphous structure with MgO

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NaF

S

Sn

N

In a group, the atomic radii from top to bottom

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increase

decrease

don't change

show variable trend

Hardness which can be removed by boiling is called

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Permanent hardness

Temporary hardness

Stiffness

Toughness

Honey contains glucose and fructose along with some other ingredients. It has greater viscosity due to:

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irregular shape of the molecules

greater molecular size and strong intermolecular forces

H-bonding

irregular shape of the molecules

Benzene reacts with Ethyl chloride in presence of AICls to give

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Benzalchloride

Benzyl chloride

Ethyl benzene

Benzotrichloride

Which of the following is not a macromolecule?

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diamond

graphite

iodine

silica

Kinetic energy of the molecules is due to

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Transnational motion

Rotational motion

Vibrational motion

All of these

Orthophosphoric acid is

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Monobasic

Dibasic

Tribasic

Tetrabasic

Action of Zn with alkyl halides in the presence of an inert solvent forms higher alkanes. This reaction is known as

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Wurtz reaction

Frankland's reaction

Cannizaro reaction

Kalobe's reaction

Aspirin is

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Acetyl salicylic acid

Phenyl salicylic acid

Salicylic acid

Benzoic acid

Ethyl alcohol is industrially prepared from ethylene by

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permanganate oxidation

Catalytic reduction

Absorbing in H₂SO₄followed by hydrolysis

Fermentation

The e.m value for positive rays maximum for:

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Oxygen.

Nitrogen.

Helium.

Hydrogen.

NH₃, HCL, H₂O, HL are:

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Diatomic molecules

Poly-atomic molecules

Mono-atomic molecules

Hetero atomic molecules

A salt producing hydrocarbon among these compounds is

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Ehyne

Ethene

Methane

Ethane

Octane number can be changed by

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Isomerisation

Alkylation

Cyclisation

All of these

The acid present in the stings of bees and wasps in

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Acetic acid

Formic acid

Formalin

Formaldehyde

Air pollution is not caused by

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Pollen grains

Hydroelectric power

Industries

Automobiles

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