| 1 |
One mole of sodium = ______ . |
- A. 24 g
- B. 25 g
- C. 26 g
- D. 23 g
|
| 2 |
_________ can be separated by physical means. |
- A. Mixture
- B. Compound
- C. Solution
- D. Nil
|
| 3 |
Which one is largest? |
- A. Exo
- B. Peta
- C. Atto
- D. Pico
|
| 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 |
How many numbers of moles are equivalent to 8 grams of CO<sub>2</sub>?<br> |
- A. 0.15
- B. 0.18
- C. 0.21
- D. 0.24
|
| 7 |
_________ is an example of substance. |
- A. Carbon
- B. Hydrogrn
- C. Oxygen
- D. Water
|
| 8 |
positive ion hare formed by _________ of electrons. |
- A. Gain
- B. Loss
- C. Sharing
- D. Bonding
|
| 9 |
A _________ is a pure substance is made up of two or more elements. |
- A. Mixture
- B. Elements
- C. Solution
- D. Compound
|
| 10 |
The molecular mass of water is |
- A. 16 amu
- B. 14 amu
- C. 18 amu
- D. 20 amu
|