Question # 1

the removal of which ion causes water softening.

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Na⁺

Mg²

Li⁺

K⁺

Which is not a heavy metal.

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Cadmium

Lead

Zinc

Murcury

The % age of carbon is bituminous is

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60

70

80

90

Which of the following is fat soluble vitamin?

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Vitamin A

Vitamin E

Vitamin K

All of these

The process which convert vegetable oil into banaspati ghee called.

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Hydrogenation

Halogenation

a and b

None of these

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

Which gas protects the Earth's surface from ultraviolet radiations?

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CO₂

CO

N₂

O₃

Composition of carbon in the diesel oil.

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C₇-C₁₀

C₁₀-C₁₂

C₁₃-C₁₅

C₁₅-C₁₈

Which salt is used for the manufacture of detergents, pulp and paper?

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NaCl

Na₂CO₃

Na₂SiO₃

NaCl

In the beginning the rate of reverse reaction is

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Negligible

Moderate

Very fast

Slow

Our planet earth consists of ____________ natural Spheres.

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1

4

6

8

Which one of the following does not contain proteins.

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In pulses

In Potatoes

In fruits

In eggs

The % age of carbon in coke is

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60

70

90

98

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