Mr. Verma, the science teacher, provided the following information about the four samples i.e. P, Q, R, and S.
| Samples | Flow of electricity | Malleability |
| P | Yes | No |
| Q | No | No |
| R | No | Yes |
| S | Yes | Yes |
Now, he told the students to identify them. The correct identifications are
a) P is copper and Q is sulfur
b) Q is coal and S is copper
c) R is iron and S is copper
d) Q is sulfur and R is coal
Correct Answer: b) Q is coal and S is copper
Explanation:
Sulfur and coal are poor conductors of heat and electricity. They are non-metals and break down into powdery mass upon tapping with a hammer. Thus, they do not possess malleability property.
However, iron and copper are good conductors of electricity and possess the property of malleability, as they can be beaten harder to transform into sheets.
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