Question # 1

All water soluble metallic oxides have characteristic of:

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acidic

basic

neutral

amphoteric

Halogenation of methane on the presence of diffused sunlight takes place.

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Only in one step

Slowly in one step

Freshly in two steps

In a series of four steps

According to Arrhenius concept acid is a substance which dissociates in aqueous solution to give.

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Hydrogen ions

Hydroxide ions

Both a and b

None of these

Halogenation of alkanes in the presence of diffused sunlight takes place.

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Suddenly, only in one step

Slowly in one step

In a series of step

Fastly in two steps

Which acid is present in our stomach.

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Nitric acid

Hydrochloric acid

Sulphuric acid

All of these

What one of the following does not contain protein?

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Pulses

Potatoes

Beans

Eggs

Carbon monoxide is harmful to us because.

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It paralyses the lungs.

It damages lungs tissues.

It reduces oxygen carrying ability of haemoglobin

It makes the blood coagulate.

Ozone has a smell

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Bitter

Rotten egg

Sweat

None of them

Which is the natural sugar found in starchy food.

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Pentose

Dextrose

Hexose

All of them

The % age of carbon in peat is :

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60%

70%

80%

90%

Which factor determines the severity of a pollutant?

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Chemical nature

concentration

Persistence

All of them

The smell of photocopies machine is due to the presence of.

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Chlorine gas

Neon gas

Helium gas

Ozone gas.

The recombination of O and O₂ in mid stratosphere is an

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Exothermic reaction

Endothermic reaction

Heat absorbing process

None of these

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