| 1 |
Tin has isotopes. |
|
| 2 |
Nickel has isotopes |
|
| 3 |
How many moles of water results by burning 4 mole of H2 with excess of oxygen. |
- A. 1 mol
- B. 2 mol
- C. 3 mol
- D. 4 mol
|
| 4 |
A glass is full of water and contains 6.02 x 10<sup>23</sup>molecules of H2O The mass of water molecules is. |
- A. 18 gm
- B. 90 g
- C. 120 g
- D. 180 g
|
| 5 |
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
|
| 6 |
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
|
| 7 |
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
|
| 8 |
What is the mass of aluminium is 204 g of the aluminum oxide Al2O3. |
- A. 26 g
- B. 27 g
- C. 54 g
- D. 108 g
|
| 9 |
Isotopes differ in |
- A. Properties which depend upon mass
- B. Arrangement of electrons in orbital
- C. Chemical properties which depend upon weight
- D. Atomic number
|
| 10 |
Which of the following contains the same number of molecules as 9 g of water. |
- A. 2 g of hydrogen gas
- B. 14 g of nitrogen gas
- C. 32 g of oxygen gas
- D. 44 g of carbon dioxide gas
|