| 1 |
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
|
| 2 |
Which gas is slightly soluble in water. |
- A. Neon
- B. Carbon di oxide
- C. Argon
- D. Oxygen
|
| 3 |
Which Gas is essential for proteins. |
- A. Sulphur
- B. Hydrogen
- C. Nitrogen
- D. Oxygen
|
| 4 |
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
|
| 5 |
It is an important constituent of DNA and RNA our body |
- A. Iron
- B. Chlorine
- C. Fluorine
- D. Phosphorus
|
| 6 |
The contents of sodium in leaf tissus vary from. |
- A. 0.01 - 10%
- B. 10-15%
- C. 12-16 %
|
| 7 |
Bucky Ball is teh third form of pure. |
- A. Carbon
- B. Graphite
- C. Magnesium
- D. Diamond
|
| 8 |
The sun almost entirely consists to the element |
- A. oxygen
- B. iron
- C. phosphorus
- D. hydrogen
|
| 9 |
It is not crystalline form of carbon |
- A. charcoal
- B. graphite
- C. buckyballs
- D. diamond
|
| 10 |
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
|
