MCQ
Define brittleness.
- ATendency to break when force is applied.
- BTendency to roll into rods.
- CTendency to become soft on heating.
- DNone of above.
Explanation:
When a force (e.g. a hammer) is applied on a substance and it breaks easily, it is said to be brittle.
Non - metals are generally brittle in nature, i.e. they break when hammered.
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| Column A | Column B |
| (i) Ionic bond | (a) $\mathrm{NH}_{3}$ |
| (ii) Polar covalent bond | (b) $\mathrm{C}_{60}$ |
| (iii) Non-polar bond | (c) $\mathrm{N}_{2}$ |
| (iv) Fullerene | (d) NaCl |