| 1 |
CO+ is an example of. |
- A. Free radical
- B. Cationic molecular ion
- C. Anionic molecular ion
- D. Stable molecule
|
| 2 |
The largest number of molecules are present in |
- A. 3.6 of H2O
- B. 4.6 g of C2H5OH
- C. 2.8 g of CO
- D. 5.4 g of N2O5
|
| 3 |
I molar volume of a gas at S.T.P is occupied by |
- A. 1 g of gas
- B. 6 x 10<sup>23</sup>g of gas
- C. 22.4 m<sup>3</sup>of gas
- D. 1 gram molecular mass of gas
|
| 4 |
How many atoms are present in half mol of oxygen gas. Gas exist in diatomic state. |
- A. 3.01 x 10<sup>23</sup>
- B. 6.02 x 10<sup>23</sup>
- C. 2 x 10<sup>23</sup>
- D. 1.003 x 10<sup>23</sup>
|
| 5 |
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>
|
| 6 |
The volume occupied by 1.4 g of N2 at S.T.P is |
- A. 2.24 dm3
- B. 22.4 dm3
- C. 1.12 dm3
- D. 112 cm3
|
| 7 |
Chlorine atom and chloride ions. |
- A. Are chemically identical
- B. Are allotropes of chlroin
- C. Have same number of electrons
- D. Have same number of protons
|
| 8 |
Isotopes are the atoms of same element with similar chemical properties but different |
- A. Atomic number
- B. Atomic volume
- C. Atomic weight
- D. Atomic structure
|
| 9 |
Paalladium has isotopes. |
- A. 6
- B. <sub>7</sub>
- C. 8
- D. 9
|
| 10 |
the number of moles of CO2 which contain 8.0 g of oxygen. |
- A. 0.25
- B. 0.50
- C. 1.0
- D. 1.50
|