| 1 |
A limiting reactant is that one which |
- A. Gives greatest number of moles of products
- B. Gives least number of moles of products
- C. Is left behind after the completion of reaction
- D. Is mostly a cheaper substance as compared to other reactants
|
| 2 |
One mole of Carbon -12 has mass |
- A. 0.012 kg
- B. 1 kg
- C. 0.022 kg
- D. 12 kg
|
| 3 |
The total number of protons and neutrons present in the nucleus of an atom is called. |
- A. Mass number
- B. Atomic number
- C. Molecular mass
- D. Relative atomic mass
|
| 4 |
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
|
| 5 |
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
|
| 6 |
How many moles of CO are present having 12.04 x 10<sup>23</sup>molecules of CO2. |
- A. 0.5 mol
- B. 1.0 mol
- C. 1,5 mol
- D. 2.0 mol
|
| 7 |
Which one of the following substances is used as water absorber in combustion analysis. |
- A. Mg(CIO4)2
- B. 50% KOH
- C. Lime water
- D. Dilute solution of NaOH
|
| 8 |
the volume occupied by 1.4 of N2 at S.T.P is |
- A. 2.24 dm3
- B. 22.4 dm3
- C. 1.12 dm3
- D. 112 cm3
|
| 9 |
The smallest collection of ions in an ionic compound is called. |
- A. Formula unit
- B. Chemical formula
- C. Formula mass
- D. Molecular formula
|
| 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
|