Question # 1

Condensed formula of ethane is.

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C₃H₈

C₂H_2n+2

C₂H_2n-2

C_nH_2n+1

What is the colour of hydrogen iodide in product?

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Purple

Yellow

Blue

Colorless

Out of twenty how many amino acids can by synthesized by human body?

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Five

Ten

Seven

Twelve

Concentration of copper are is carried out by process.

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Roasting

Forth floatation

Gravity sepration

Electrostatic separation

Which is a Lewis base?

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H⁺

NH₄

BF₃

AlCl₃

DNA was discovered by

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J .Watson

Funk

Robert brown

Hopkins

Indicators are the

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Inorganic compounds

Organic compounds

Ionic compounds

Covalent compounds

Cause of Night blindness is.

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Deficiency of vitamin B

Deficiency of vitamin A

Deficiency of vitamin D

Deficiency of vitamin E

The functional group -COOH is found in.

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Aldehydes

Esters

Carboxylic acids

alcohols

Which one of the following properties of water is responsible for rising of water in plants?

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Specific heat capacity

Viscosity

Excellent solvent action

Capillary action

Ozone is formed in:

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Troposphere

Stratosphere

Mesosphere

Thermosphere

Building block of lipids are.

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Fatty acids

Carboxylic acids

Mineral acids

Alcohols

The green house effect is proportional to the amount of which gas in air.

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CO₂

O₂

N₂

All of them

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