| 1 |
The water which produces good lather with soap is called: |
- A. soft water
- B. hard water
- C. heavy water
- D. typical water
|
| 2 |
Gypsum in water is. |
- A. Sparingly soluble
- B. Insoluble
- C. Highly soluble
- D. None of them
|
| 3 |
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>
|
| 4 |
The bond angle between H-O-H in water is: |
- A. 104.5<sup>o</sup>
- B. 104.6<sup>o</sup>
- C. 104.7<sup>o</sup>
- D. 104.8<sup>o</sup>
|
| 5 |
The heat capacity of water is greater than rocks. |
- A. 4 times
- B. 5 times
- C. 6 times
- D. 7 times
|
| 6 |
Some organic compound are soluble in water due to the presence of . |
- A. -OH
- B. H<sup>+</sup>
- C. Botha a and b
- D. Covalent bond
|
| 7 |
Vibrious cholera causes. |
- A. Choleera
- B. Dysentery
- C. Fluorsis
- D. Hepatitis
|
| 8 |
Which disease cause when humans use water of industrial effluents. |
- A. Cancer
- B. Asthma
- C. Jaundice
- D. cholera
|
| 9 |
the removal of which ion causes water softening. |
- A. Na<sup>+</sup>
- B. Mg<sup>2</sup>
- C. Li<sup>+</sup>
- D. K<sup>+</sup>
|
| 10 |
Temporary hardness in water can he removed by. |
- A. Boiling Method
- B. Using washing soda
- C. Using sodium zeolite
- D. All of them
|