| 1 |
Teh process of converting atompspheric nitrogen to useable from is called. |
- A. Nitrogen cycle.
- B. Carbon cycle
- C. Nitrogen fixation
- D. Water cycle
|
| 2 |
The most common element in the universe is |
- A. oxygen
- B. hydrogen
- C. nitrogen
- D. iron
|
| 3 |
The amout of carbon dioxide int eh air is increased by. |
- A. Photosynthesis
- B. Respiration
- C. Burning
- D. Evaporation
|
| 4 |
The deficiency of iodine in human body casue. |
- A. Goiter
- B. Cancer
- C. Tuberculosis
- D. Cholera
|
| 5 |
The process which loops the amount of nitrogen constant in air is |
- A. nitrogen fixation
- B. nitrogen cycle
- C. oxidation
- D. photosynthesis
|
| 6 |
One of the essential part of all living things on the earth |
- A. carbon
- B. nitrogen
- C. hydrogen
- D. oxygen
|
| 7 |
Bucky Ball is teh third form of pure. |
- A. Carbon
- B. Graphite
- C. Magnesium
- D. Diamond
|
| 8 |
Nitrogen occur in the atmosphere as................. molecules. |
- A. Triatomic
- B. Diatomic
- C. Polyatomic
- D. None of these
|
| 9 |
It is an important constituent of DNA and RNA our body |
- A. Iron
- B. Chlorine
- C. Fluorine
- D. Phosphorus
|
| 10 |
Which Gas is essential for proteins. |
- A. Sulphur
- B. Hydrogen
- C. Nitrogen
- D. Oxygen
|
