In __________ process, ions of salts react with water to produce acidity or alkalinity.

If the total hardness of water is greater than its total alkalinity, the carbonate hardness will be equal to

A

Total alkalinity

B

Total hardness

C

Total hardness total alkalinity

D

Non carbonate hardness

Alkalinity in water is expressed as milligrams per litre in terms of equivalent

A

Calcium carbonate

B

Magnesium carbonate

C

Sodium carbonate

D

Calcium hydroxide

Which one of the following metals does not react with water to produce Hydrogen ?

A

Potassium

B

Cadmium

C

Sodium

D

Lithium

which of the following has least Alkalinity ?

A

NH4OH

B

AgOH

C

NH2OH

D

NH2-NH2

Acidity in water is caused due to

A

Mineral acids

B

Free CO₂

C

Aluminium sulphate

D

All the above

The most common cause of acidity in water is

A

Carbon dioxide

B

Oxygen

C

Hydrogen

D

Nitrogen

A machine can produce 10 units in 5 hours. Another machine can produce 5 units in 10 hours. Working together, how many units can they produce in 30 hours?

A

50 units

B

60 units

C

70 units

D

80 units

To check acidity, one had better ------litmus paper.

A

using

B

useful

C

usable

D

use

To check acidity, one had better_____a litmus paper.

A

suing

B

use

C

to use

D

useful

To check acidity, one had better ——litmus paper.

A

using

B

useful

C

usable

D

use

In __________ process, ions of salts react with water to produce acidity or alkalinity.

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