| 1 |
Nitrogen occur in the atmosphere as................. molecules. |
- A. Triatomic
- B. Diatomic
- C. Polyatomic
- D. None of these
|
| 2 |
The contents of sodium in leaf tissus vary from. |
- A. 0.01 - 10%
- B. 10-15%
- C. 12-16 %
|
| 3 |
If a key is stiff in a lock, rub the end of the key a soft pencil, which types of elements we obtain. |
- A. Graphite
- B. Silver
- C. Gold
- D. Paltinum
|
| 4 |
Ice floats on the surface of water due to. |
- A. Higher density
- B. Lower density
- C. Normal density
- D. Very High density
|
| 5 |
Which gas is slightly soluble in water. |
- A. Neon
- B. Carbon di oxide
- C. Argon
- D. Oxygen
|
| 6 |
The density of ice at o°C is & nbsp |
- A. 0.918g/cm3
- B. 0.618g/cm3
- C. 0.718g/cm3
- D. 0.8/8 g/cm3
|
| 7 |
What type of liquid has abnormal freezing and boiling point. |
- A. Water
- B. Juice
- C. Petrol
- D. Diesel
|
| 8 |
The form of carbon which is not crystalline is. |
- A. Charcoal
- B. Graphite
- C. Bucky Ball
- D. Diamond
|
| 9 |
Each day a normal man breathe............ litres of air. |
- A. 20,000 to 15,000
- B. 10,000 to 15,000
- C. 15,000 to 20,000
- D. 21,000, to 31,000
|
| 10 |
The process which increases the amount of carbon dioxide in air is called |
- A. photosynthesis
- B. respiration
- C. oxidation
- D. vaporization
|
