| 1 |
Which one of the properties of water is responsible for rising of water plants?. |
- A. Specific heat capacity
- B. Surface tension
- C. Excellent solvent action
- D. Capillary action.
|
| 2 |
Which element protects teeth from decay? |
- A. Potassium
- B. Fluorine
- C. Sodium
- D. Calcium
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| 3 |
Which element do not causes toxicity in water? |
- A. Lead
- B. Arsenic
- C. Sodium
- D. Mercury
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| 4 |
The process of removing temporary hardness of water. |
- A. Clark's method
- B. Washing soda method
- C. Sodium zeolite
- D. Filteration method
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| 5 |
Neurological damage is caused by the poisoning of. |
- A. Lead
- B. Cadimium
- C. Mercury
- D. All of them
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| 6 |
Hook worm infects. |
- A. Liver
- B. Small intestine
- C. Large intestine
- D. Stomach
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| 7 |
Temporary hardness of water is removed by adding. |
- A. Ca(OH)<sub>2</sub>
- B. NaOH
- C. KOH
- D. CaSO<sub>4</sub>
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| 8 |
Industrial effluents are highly |
- A. Toxic organic compounds.
- B. Inorganic salts.
- C. Heavy metals
- D. All of them
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| 9 |
soap is the sodium salt of long chain. |
- A. Amino acids
- B. Fatty acids
- C. Nucleotides
- D. None of them
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| 10 |
The boiling point of water is. |
- A. 100<sup>o</sup>C
- B. 4<sup>o</sup>C
- C. 0<sup>o</sup>C
- D. 25<sup>o</sup>C
|