Question # 1

Rickets disease is caused by the deficiency of.

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Vitamin D

Vitamin A

Vitamin E

Vitamin C

Alkanes give reaction only

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Addition

Decomposition

Substitution

Displacement

Which of the following gas is used to destroy harmful bacteria in water.

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Iodine

Chlorine

fluorine

Bromine

By which process alkenes are prepared from alcohols:

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Dehelogenation

Dehydrogenation

Dehydration

Dehydro-halogenation

Chemical formula of amino group is

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NH₃

NH₂

NH₄

COOH

Which one of these is used as anaesthesia?

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carbon black

Mehtane

Ethane

Chloroform

Which one of these pollutants are not found in car exhaust fumes?

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CO₂

O₃

NO₂

SO₂

The accumulation of which vitamin causes bone like deposits in the kidney.

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Vitamin D

Vitamin E

Vitamin B

Vitamin A

Which helps in lowering of cholesterol level?

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Vitamin

Fiber

Carbohydratres

All of them

The carbon contents in lignite is.

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80%

50%

60%

70%

PAN stands for

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Poly aniline nitrate

Proxy acetyl nitrate

Poly acetyl nitrite

Proxy acetyl nitrite

Normaily rain water is weakly acidic because.

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SO₃

CO₂

CO₃

NO₂

Dilute acid react with carbonates the produce product except _________

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Salt

Water

Carbon di oxide

Hydrogen gases

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