| 1 |
Water, carbon dioxide, ammonia and methane are examples of. |
- A. Atoms
- B. Elements
- C. Compounds
- D. Mixture
|
| 2 |
Which one of the following is a metalloid element. |
- A. Gold
- B. Boron
- C. Silver
- D. Nitrogen
|
| 3 |
The number of proton present in atom is called. |
- A. Atomic number
- B. Atomic mass
- C. Atomic weight
- D. Mass
|
| 4 |
How many atoms are present in one molecule of helium. |
|
| 5 |
The subatomic particles of an atom are. |
- A. Proton
- B. Electron
- C. Neutron
- D. All of these
|
| 6 |
Which one of the following is a non metallic element. |
- A. Oxygen
- B. Aluminium
- C. Iron
- D. Beryllium
|
| 7 |
Choose an atom which can-exist idenpendently at room temperature. |
|
| 8 |
Which of the following gas is used by plants for making food. |
- A. Hydrogen
- B. Oxygen
- C. Nitrogen
- D. Carbon dioxide
|
| 9 |
Matter exist in |
- A. Solid
- B. Liquid
- C. gas
- D. All of these
|
| 10 |
Which of the following state has specific shape and volume. |
- A. Gas
- B. Solid
- C. Liquid
- D. Both a and b
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