Question # 1

Mesophere extend forms 50 km to:

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50 km

12 km

60 km

85 km

Temporary hardness is because of .

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Ca(HCO₃)₂

CaCO₃

MgCO₃

MgSO₄

According to Bronsted and Lowry concept a base is a substance that can accept.

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Proton

Electron pair

Neutron

Electron

Night blindness is because of deficiency of:

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Vitamin A

Protein

Vitamin C

Vitamin D

Conversion of dead plants into coal by the action of bacteria and heat is called.

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Carbonization

Catenation

Hydrogenation

Cracking

What one of the following does not contain protein?

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Pulses

Potatoes

Beans

Eggs

Number of vitamins in vitamin B complex is.

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10

8

6

12

Water which produces good lather with soap is called.

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Soft water

Hard water

Heavy water

All of them

When the number of moles of both sides are equal in a reaction then the unit of Kc will be:

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no unit

mol-2 dm6

mol dm3

mo-2 dn

Coal having 90% carbon contents is called.

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Peat

Lignite

anthracite

bituminous

Aromatic compounds are given this name because of;

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smell they have

slippery touch they have

bitter taste they have

sour taste they have

The body reactions are catalized by.

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Amino acids

Lipids

Enzymes

Fatty acids

The reaction in which the products can recombine to form reactants are called.

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Reversible reaction

Irreversible reaction

Decomposition

Addition

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