| 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 |
Water dissolves non-ionic compound by |
- A. Ion-ion forces
- B. Ion-dipole forces
- C. Dipole -dipole forces
- D. Hydrogen bonding.
|
| 3 |
Density of water at 4°C is: |
- A. 0.976 gem-3
- B. 1 gem-3
- C. 0.956 gem-3
- D. 1.1 gem-3
|
| 4 |
The process by which water rises up from the roots of plants to leaves is called. |
- A. Photosynthesis
- B. Respiration
- C. Surface tension
- D. Capillary action
|
| 5 |
The salts of which element are present in detergent that causes the rapid growth of algae in water bodies is. |
- A. Phosphate
- B. Calcium
- C. Sodium
- D. All of them
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| 6 |
Which one of the diseases causes severe diarrhea and can be fatal? |
- A. Jaundice
- B. Dysentery
- C. Cholera
- D. Typhoid
|
| 7 |
Cholera is caused by |
- A. Protozoa
- B. Virus
- C. Bacteria
- D. Fungi
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| 8 |
Temporary hardness is because of . |
- A. Ca(HCO<sub>3</sub>)<sub>2</sub>
- B. CaCO<sub>3</sub>
- C. MgCO<sub>3</sub>
- D. MgSO<sub>4</sub>
|
| 9 |
One H<sub>2</sub>O molecule can form hydrogen bonding with how many other H<sub>2</sub>O molecules? |
- A. One
- B. Two
- C. Three
- D. Four
|
| 10 |
Which disease cause when humans use water of industrial effuents. |
- A. Cancer
- B. Asthma
- C. Jaundica
- D. Cholera
|