| 1 |
Which is not a heavy metal. |
Cadmium
Lead
Zinc
Murcury
|
| 2 |
Industrial effluents are highly |
Toxic organic compounds.
Inorganic salts.
Heavy metals
All of them
|
| 3 |
Mg2+ and Ca2+ ions react with soap to form calcium and magnesium salts of fatty acids called. |
Gelatin
Scum
Paste
None of them
|
| 4 |
soap is the sodium salt of long chain. |
Amino acids
Fatty acids
Nucleotides
None of them
|
| 5 |
Hard water can cause. |
Stomach disorder
Boiler blasts
Inefficiency of engine
All of them
|
| 6 |
Sodium zeolite is naturally occurring reason of . |
NaAl (SiO<sub>3</sub>)<sub>2</sub>
Na<sub>2</sub>CO<sub>3</sub>
CaCO<sub>3</sub>
Na<sub>2</sub>SIO<sub>3</sub>
|
| 7 |
Temporary hardness in water can he removed by. |
Boiling Method
Using washing soda
Using sodium zeolite
All of them
|
| 8 |
Calcium carbonate is in water. |
Insoluble
Sparingly
None of them
Soluble
|
| 9 |
the removal of which ion causes water softening. |
Na<sup>+</sup>
Mg<sup>2</sup>
Li<sup>+</sup>
K<sup>+</sup>
|
| 10 |
Temporary hardness is due to the presence of bicarbonates of. |
Calcium
Magnsium
Both of them
None of them
|
| 11 |
Gypsum in water is. |
Sparingly soluble
Insoluble
Highly soluble
None of them
|
| 12 |
Chemical form of gypsum. |
MgSO<sub>4</sub>. 5H<sub>2</sub>O
CaSO<sub>4</sub>. 2H<sub>2</sub>O
FeSO<sub>4</sub>. 5H<sub>2</sub>O
CuSO<sub>4</sub>. 5H<sub>2</sub>O
|
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