| 1 |
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
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| 2 |
The volume occupied by 16 g of CH4 at S.T.P. |
- A. 224.14 dm3
- B. 22.4 dm3
- C. 1.12 dm3
- D. 2.24 dm3
|
| 3 |
Isotopes differ in. |
- A. Properties which depend upon mass
- B. Arrangement of electrons in orbitals
- C. Chemical properties
- D. None of these
|
| 4 |
During combustion analysis, CO2 produced is absorbed in |
- A. Mg (CLO4)2
- B. 50% KOH
- C. CaCl2
- D. P2O5
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| 5 |
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
|
| 6 |
Paalladium has isotopes. |
- A. 6
- B. <sub>7</sub>
- C. 8
- D. 9
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| 7 |
More abundant isotope of an element is the one with. |
- A. Even atomic number
- B. Odd atomic number
- C. Even mass number
- D. Odd mass number
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| 8 |
What has a mass equal to that of one mole of water. |
- A. 22.4 dm3 of water
- B. One mole of steam
- C. One molecule of water
- D. Two moles of hydrogen molecules and one mole of oxygen molecules.
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| 9 |
The Avogadro constant is the number of. |
- A. Atoms in 1 g of helium ga
- B. Molecules in 35.5 g of chlorine gas
- C. Atoms in 6 h graphite
- D. Atoms in 24 g of magnesium
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| 10 |
The element nickel has isotopes. |
|