| 1 |
The percentage of water in human body is about: |
- A. 60%
- B. 50%
- C. 70%
- D. 80%
|
| 2 |
A disease is caused by excess of bile pigments in the blood is. |
- A. Typhoid
- B. Jaundice
- C. Cholera
- D. Dysentery
|
| 3 |
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>
|
| 4 |
The density of water is ................. at 4<sup> o</sup>C |
- A. 1 gcm<sup>-1</sup>
- B. 2 gcm<sup>-1</sup>
- C. 3 gcm<sup>-1</sup>
- D. 4 gcm<sup>-1</sup>
|
| 5 |
Mercury poisoning cause: |
- A. neurological damage
- B. high blood pressure
- C. kidney damage
- D. gastro
|
| 6 |
Which gas is used to destroy harmful bacteria in water? |
- A. Iodine
- B. Chlorine
- C. Flourine
- D. Bromine
|
| 7 |
The percentage of potable water on earth is. |
- A. 2%
- B. 0.2%
- C. 0.02%
- D. 0.002%
|
| 8 |
The heat capacity of water is greater than rocks. |
- A. 4 times
- B. 5 times
- C. 6 times
- D. 7 times
|
| 9 |
Temporary hardness is due to the presence of bicarbonates of. |
- A. Calcium
- B. Magnsium
- C. Both of them
- D. None of them
|
| 10 |
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>
|