| 1 |
The volume occupied by 1.6 g of O<sub>2</sub>at STP is |
- A. 22.4 dm<sup>3</sup>
- B. 2.24 dm<sup>3</sup>
- C. 1.12 dm<sup>3</sup>
- D. 112 dm<sup>3</sup>
|
| 2 |
The mass of one mole of electrons is. |
- A. 1.008 mg
- B. 0.55 mg
- C. 0.184 mg
- D. 1.673 mg
|
| 3 |
In mass spectrometry, ions are produced by |
- A. Heat at high temperature
- B. Passing gas through high voltage plates
- C. Throwing fast moving electrons on gas molecules
- D. All of them
|
| 4 |
Which statement is incorrect about 64 g of SO2. |
- A. It is one mole SO2
- B. The number of SO2 molecule are 6.02 x 10<sup>23</sup>
- C. The number of oxygen atoms are 6.02 x 10<sup>23</sup>
- D. The number sulphur atom are 6.02 x 10<sup>23</sup>
|
| 5 |
Bromine has isotopes |
|
| 6 |
Paalladium has isotopes. |
- A. 6
- B. <sub>7</sub>
- C. 8
- D. 9
|
| 7 |
Tin has isotopes. |
|
| 8 |
In Al2O3, the ratio between the ions is |
- A. 1 :2
- B. 2:1
- C. 2:3
- D. 3:2
|
| 9 |
One mole of CH<sub>3</sub>OH and one mole of C<sub>2</sub>H<sub>5</sub>OH have |
- A. Equal number of atoms
- B. Equal number of molecules
- C. Equal number of electrons
- D. Equal number of protons
|
| 10 |
How many moles of AgCI are produced by combination of 1.0 mole of AgNO<sub>3</sub>and 2.0 mole of NaCI |
- A. 1.0
- B. 2.0
- C. 3.0
- D. 4.0
|