Question # 1

Mallic acid is present in

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Apple

Feats

String of bees

Urine

Soda time is a mixture of:

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CaO and NaOH

CaCI2 and NaOH

CaO and ca(OH)2

CaCI2 and KOH

Freezing point of water is:

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-4°C

0°C

-36°C

-58°C

Ammonia is prepared by the process .

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Ostwald

Haber

Clark

All

The order of reactivity of hydrogen halides with alkenes is.

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HI>HBr

HBr>HI

HCl>HBr

HBr < HCl

The percentage of water in human body is about:

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60%

50%

70%

80%

Incomplete combustion of alkanes produce.

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Carbon dixoide only

Carbon monoxide only

Carbon monoxide carbon black and water

Carbon dioxide and carbon black

Example of complex salt is.

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Zinc sulphate

Potash alum

Potassium ferrocynide

Sodium Phosphate

Temporary hardness is removed by adding.

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Quick lime

Slaked lime

Lime stone

Lime water.

Which one of these is used as anaesthesia?

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carbon black

Mehtane

Ethane

Chloroform

The stratosphere layer is at height above the earth's surface.

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0-12 km

12-50 km

50-85 km

65-120 km

The color of Iodine is:

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Purple

Black

Red

Pink

ozone depletion (i.e O3--------------> O2 + O) occurs in:

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lower stratosphere

middle stratosphere

upper stratosphere

troposphere

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