Question # 1

The suspended particles in the raw water can be removed by the

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Coagulation

Aeration

Hydration

Dehydration

The vapour density of a gas is 11.2.The volume occupied by 11.2 g of this gas at N.T.P is

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22.4 litres

11.2 litres

1 litre

2.24 litres

What is the co-ordination number of face centered cubic structure?

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12

8

6

10

The kinetic energy of three moles of gas is:

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3/2 RT

3 RT

1/2 RT

2 RT

Which of the following polymer has application in paper industry

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Starch

Glycogen

Protein

All

Silk is an example of

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animal fiber

vegetable fibre

mineral fibre

none of these

Which of the following compound have empirical formula, but no molecular formula

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H20

C6H6

H₂O₂

NaCl

SO₂produced by volcanoes is about

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75%

67%

69%

70%

A covalent bond may be

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100% covalent

Partial ionic

100% ionic

Both a and b

An electron with drawing group attached to e-position in phenol

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makes it basic

Stabilises the phenoxide ion

decreases its basicity

allows it to precipitate in aqueous solution

Optimum PH for enzyme pepsin is

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01

2

05

6.5

The difference between amount of heat actually released and that of calculated is called

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Bonding energy

Activation energy

Resonance energy

Transition energy

Vegetable oils are

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Unsaturated fatty acids

Glycerides of unsaturated fatty acids

Glycerides of saturated fatty acids

Essential oils obtained from plants

The range of visible spectrum is

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300 - 600 nm

600 - 900 nm

400 - 750 nm

100 - 300 nm

Which of the following is not affected by light

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The art of electroplating was given by

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Faraday

Edison

Thomas Gradam

Brugan

Which one does not declourized KMnO₄

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Alkenes

Alkynes

Bezene

All above

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The percentage of methane in natural gas is

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50%

60%

85%

90%

Which of the following elements is not present abundantly in earth's crust?

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Silicon

Aluminium

Sodium

Oxygen

Sulphuric acid reacts with PCl₅to give

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Thionyl chloride

Sulphur monochloride

Sulphuryl chloride

Sulphur tetrachloride

Which of the following is a water soluble vetamin?

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Niacin

Riboflavin

Trypsin

Ascorbic acid

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