| 1 |
The quantity of a matter in a body is called ____________ |
- A. Mass
- B. Weight
- C. Atom
- D. Molecule
|
| 2 |
It is a triatomic molecule |
- A. Sodium chloride
- B. Water
- C. Chalk
- D. Glucose
|
| 3 |
___________ is a pure substance that can be broken down. |
- A. Matter
- B. Element
- C. Mass
- D. Mixture
|
| 4 |
The formula of benzene is _________ |
- A. C6H6O3
- B. C6H6
- C. C12H22
- D. Nil
|
| 5 |
Polyatomic molecules consist of _________ atoms. |
- A. 1
- B. More than 1
- C. Less than 1
- D. 2
|
| 6 |
Which one of the following pair has the same mass?<br> |
- A. 1 mole of CO and 1 mole of N<sub>2</sub><br>
- B. 1 mole of CO and 1 mole of CO<sub>2</sub>
- C. 1 mole of O<sub>2</sub> and 1 mole of N<sub>2</sub>
- D. 1 mole of O<sub>2</sub> and 1 mole of CO<sub>2</sub>
|
| 7 |
_________ shells of noble gases is complete. |
- A. Outer most
- B. 2
- C. 1
- D. Nil
|
| 8 |
positive ion hare formed by _________ of electrons. |
- A. Gain
- B. Loss
- C. Sharing
- D. Bonding
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| 9 |
The mass of one molecule of water is:<br> |
- A. 18 amu
- B. 18g
- C. 18mg
- D. 18kg
|
| 10 |
Free radical is a |
- A. Extremely stable
- B. Extremely reactive
- C. Extremely inert
- D. All of these
|