Question # 1

A polymeric substance that is formed in the liquid state and then hardened to a rigid solid is called:

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fiber

plastic

varnish

polyamide resin

A polymeric substance that is formed in the liquid state and then hardened to a rigid solid is called

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Fibre

Plastic

Varnish

Polyamide resin

The structure of a polymer depends upon how the monomer-repeating unit joins to makes a polymer, What is not the type of structure of a polymer?

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synthetic polymer

linear polymer

branched

cross linked or inter connected polymer

which one pair has the same oxidation state of-Fe?

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FeSO4 and FeCl4

FeCl4and FeCl3

FeSO4 and FeCl2

Fe2(SO4)3 and FeSO4

The attractive forces which are created due to repulsion of electronic cloud of the molecules are

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dipole-dipole forces

ion dipole forces

instantaneous dipole-induced dipole forces

dipole-induced dipole forces

The number of molecules in one dm³of water is close to:

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6.02/22.4 x10²³

12.04/22.4 x10²³

18/22.4x 10²³

55.6x6.02x10²³

Which one of following statement about three about three states of matter is incorrect?

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in solids the particles vibrate about fixed positions

energy is released when a gas turns back to a liquid

particles in gases move in a random manner

the closer particles are together, smaller the force of attraction between them

The radioactive disintegration of 238U92 is

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First order

Second order

Third order

Zero order

Which is unnecessary for purification of water for drinking purpose?

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Coagulation

Treatment with iodine

Aeration

Chlorination

Ozone is produced in regions:

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tropical

Polor

antaric

equator

The volume of a real gas

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is constant

increases with T decrease

becomes zero at absolute zero

never becomes zero

The oxidation number of chromium in K₂Cr₂O₇is

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14

12

6

None of these

Which of the following mixture of liquids show negative deviation form Raults law

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Ethyl alcohol and ether

HCI and water

Phenol- water

Chlorobenene-bromobenene

Those amino acids which contain two carboxylic groups are called ______ amino acids

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Acidic

Basic

Neutral

None of these

Which have better penetrating power

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Alpha rays

Beta rays

Gamma rays

X-rays

The general formula of amino acids is

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The compound prepared by a substitution reaction of benzene is

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Acetophenone

Glyoxal

Cyclohexame

Hexabromo cyclohexane

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Rate is independent of concentration of water since it is in excess

Rate is independent of concentration of ester since it is in exces

Rate depends upon the concentration of acid catalyst added

Rate = k[CH₃COOC₂H₅]^1/2[H₂O]^1/2

Which of the following molecules have multiple bonds

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CH₄

C₂H₄

C₂H₆

CCI₄

A compound having empirical formula C₃H₃O and its molecular mass is 110.02. Its molecular formula is

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C₃H₃O

C₆H₆O₂

C₉H₉O₃

C₃H₆O₂

When fused PbBr2 is electrolyzed :

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Lead appears at anode.

Lead appears at cathode.

Bromine appears at cathode.

Lead appears at both electrodes.

Sterols, vitamin D and terpenese belong to

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Simple lipids

Complex lipids

Derived lipids

None

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