Question # 1

Choose an addition polymer among the following

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Terylone

Nylon 6, 6

Polystyrene

Epoxy resin

Which of the following polymer has application in paper industry

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Starch

Glycogen

Protein

All

A molecule which contains two lone pairs and two bond pairs of electrons in valence shell of central atom, geometrical shape of molecules will be

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Tetrahedral

Trigonal pyramidal

Angular

Linear

In most of the cases the molecular crystals are

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very soft

soft

extremely hard

sufficiently hard

Which three element are needed for the health growth of plants:

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S,S,P

N,Ca,P

N,P,K

N,K,C

When chlorofluoro carbon are subjected to U.V they form

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Cations

Aninons

Free radicals

None of these

Liquids are less common than:

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Solids.

Plasmas.

Gases.

All of above.

Which is inorganic polymer?

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Plastic

Rubber

synthetic fiber

Lipids

Relationship between volume of a gas and prevailing conditions of temperature and pressure are called

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Gas laws

Equilibrium laws

Rate laws

None of these

Choose the difference between natural and synthetic fertilizers:

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shapes

usage

crop application

raw material

Which of the following molecules should be more volatile

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HF

HCl

HBr

HI

In lead accumulator the electrolyte is H₂SO₄solution is

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30% H₂SO₄

60% H₂SO₄

80% H₂SO₄

90% H₂SO₄

The number of elements in the first, second and third period are

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2, 8, 18

8, 2, 18

2, 18, 8

2, 8, 8

Among the following polymers, the strongest molecular forces are present in

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Elastomers

Fibres

Thermoplactics

Thermosetting polymers

Pollutant of automobile exhausts that affects nervous system/produces mental diseases is

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Mercury

Lead

Nitrogen oxide

Sulphuric oxide

Molarity of pure water is :

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33.3

55.5

44.4

66.6

Cellulose does:

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Satisfy human appetite

Stimulates intestinal peristalsis

Gives fibre and bulk to the food

All of these

If Grignard reagent is allowed to react with another alkyl halide the main product is

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An alkane

Cyclo alkane

Alkyne

An alkene

18 g glucose is dissolved in 90 g of water. The relative lowering vapor pressure is equal to :

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1/5

5.1

1/51

6

Which behaves as insulator for animals body?

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Carbohydrates

Proteins

Fats

Skin

Carboxyl compounds have functional group:

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R-C-X

R-CH=O

RCOR

All

The covalent radius of Cl atom is:

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99.4 pm.

176.7 pm

38 pm

76 pm.

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