| 1 |
Number of the neutrons in helium element. |
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| 2 |
The subatomic particles of an atom are. |
- A. Proton
- B. Electron
- C. Neutron
- D. All of these
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| 3 |
Water, carbon dioxide, ammonia and methane are examples of. |
- A. Atoms
- B. Elements
- C. Compounds
- D. Mixture
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| 4 |
Choose an atom which can-exist idenpendently at room temperature. |
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| 5 |
The number of proton present in atom is called. |
- A. Atomic number
- B. Atomic mass
- C. Atomic weight
- D. Mass
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| 6 |
C6H12O6is he formula of glucose. How many oxygen are there in one molecule of glucose. |
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| 7 |
Which one of the following is a non metallic element. |
- A. Oxygen
- B. Aluminium
- C. Iron
- D. Beryllium
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| 8 |
Matter exist in |
- A. Solid
- B. Liquid
- C. gas
- D. All of these
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| 9 |
Which of the following gas is used by plants for making food. |
- A. Hydrogen
- B. Oxygen
- C. Nitrogen
- D. Carbon dioxide
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| 10 |
Which one of the following is an element. |
- A. O3
- B. CO2
- C. CH4
- D. H2O
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