| 1 |
Which element protects teeth from decay? |
- A. Potassium
- B. Fluorine
- C. Sodium
- D. Calcium
|
| 2 |
Hookworm is a parasite that infects the: |
- A. large intestine
- B. small intestine
- C. stomach
- D. liver
|
| 3 |
Example of pest is |
- A. Weeds
- B. Herbs
- C. Insect
- D. All of them
|
| 4 |
The process of removing temporary hardness of water. |
- A. Clark's method
- B. Washing soda method
- C. Sodium zeolite
- D. Filteration method
|
| 5 |
Hook worm infects. |
- A. Liver
- B. Small intestine
- C. Large intestine
- D. Stomach
|
| 6 |
Which one of the following properties of water is responsible for rising of water in plants? |
- A. Specific heat capacity
- B. Viscosity
- C. Excellent solvent action
- D. Capillary action
|
| 7 |
Inland water includes. |
- A. River
- B. Lakes
- C. Streams
- D. All of them
|
| 8 |
Which is not a heavy metal. |
- A. Cadmium
- B. Lead
- C. Zinc
- D. Murcury
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| 9 |
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>
|
| 10 |
Sodium zeolite is resin of: |
- A. NaAl(SiO<sub>3</sub>)<sub>2</sub>
- B. KAl(SiO<sub>3</sub>)<sub>2</sub>
- C. LiAl(SiO<sub>3</sub>)<sub>2</sub>
- D. RbAl(SiO<sub>3</sub>)<sub>2</sub>
|