Question # 1

The bond angle between H-O-H in water is:

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104.5^o

104.6^o

104.7^o

104.8^o

The freezing point of water is:

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10 ^oC

100^oC

0^oC

46^oC

Froth flotation process is used to concentrate the ore on:

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Density basis

Concentration basis

Wetting basis

Magnetic basis

Which colour of HI is ?

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Orange

Purple

Red

Colourless

Which acid is used an electrolyte in lead storage battery?

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H₂SO₄

HNO₃

HCl

CH₃COOH

The density of water is ................. at 4^oC

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1 gcm^-1

2 gcm^-1

3 gcm^-1

4 gcm^-1

Molecular formula of butyne is .

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C₄H₆

C₃H₄

C₄H₇

C₄H₈

Concentration of copper are is carried out by process.

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Roasting

Forth floatation

Gravity sepration

Electrostatic separation

Number of vitamins in vitamin B complex is.

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10

8

6

12

General formula of Alkyl radical is..

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C₆H_2n-2

C_nH_2n+2

C₁₁H_2n-1

C_nH_2n-2

Which one of the following is used as jet fuel.

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Kerosene oil

Lubricating oil

Fuel oil

Diesel oil

In which one of the following is a substitution reaction?

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Halogenations of alkynes

Halogenations of alkenes

Halogenations of alkanes

Bromination of alkenes

General formula of alcohols is:

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RCHO

ROH

O= R - C -OH

O = R - C- R

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