| 1 |
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
|
| 2 |
Which one of the following salts makes the water permanent hard. |
- A. NaCO<sub>3</sub>
- B. NaHCO<sub>3</sub>
- C. Ca(HCO<sub>3</sub>)<sub>2</sub>
- D. CaSO<sub>4</sub>
|
| 3 |
Neurological damage is caused by the poisoning of. |
- A. Lead
- B. Cadimium
- C. Mercury
- D. All of them
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| 4 |
The heat capacity of water is. |
- A. 4.2 Jg<sup>-1</sup> K<sup>-1</sup>
- B. 2.1 Jg<sup>-1</sup>K<sup>-1</sup>
- C. 3.2 Jg<sup>-1</sup>K<sup>-1</sup>
- D. 5.9 Jg<sup>-1</sup>K<sup>-1</sup>
|
| 5 |
Which one of the following disease causes severe diarrhea and can be fatal: |
- A. Jaundic
- B. Dysentery
- C. Cholera
- D. Typhoid
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| 6 |
Which process is responsible for ascending of water in roots: |
- A. evaporation
- B. transpiration
- C. condensation
- D. capillary action
|
| 7 |
Which disease cause liver inflammation? |
- A. Typhoid
- B. Jaundice
- C. cholera
- D. Hepatitis
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| 8 |
The chemical used in Clark's method is: |
- A. CaO
- B. slaked lime(Ca(OH)s)
- C. washing soda
- D. sodium zeolite
|
| 9 |
Which one of the following ion does not cause hardness in water? |
- A. Ca<sup>+2</sup>
- B. Mg<sup>-2</sup>
- C. SO<sup>-2</sup>
- D. Na<sup>+</sup>
|
| 10 |
Which gas is used to destroy harmful bacteria in water? |
- A. Iodine
- B. Chlorine
- C. Flourine
- D. Bromine
|