| 1. | The nucleus of an atom consists of |
| a. | electrons and neutrons |
| b. | electrons and protons |
| c. | protons and neutrons |
| d. | All of the above |
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Answer: (c).protons and neutrons
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| 2. | The number of moles of solute present in 1 kg of a solvent is called its |
| a. | molality |
| b. | molarity |
| c. | normality |
| d. | formality |
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Answer: (a).molality
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| 3. | The most electronegative element among the following is |
| a. | sodium |
| b. | bromine |
| c. | fluorine |
| d. | oxygen |
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Answer: (c).fluorine
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| 4. | The metal used to recover copper from a solution of copper sulphate is |
| a. | Na |
| b. | Ag |
| c. | Hg |
| d. | Fe |
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Answer: (d).Fe
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| 5. | The number of d-electrons in Fe2+ (Z = 26) is not equal to that of |
| a. | p-electrons in Ne(Z = 10) |
| b. | s-electrons in Mg(Z = 12) |
| c. | d-electrons in Fe(Z = 26) |
| d. | p-electrons in CI(Z = 17) |
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Answer: (d).p-electrons in CI(Z = 17)
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