Q4. Mark ‘T’ if the statement is true and ‘F’ if it is false.

(a) Generally, non-metals react with acids.                       ( )

(b) Sodium is a very reactive metal.                                  ( )

(c) Copper displaces zinc from zinc sulphate solution.      ( )

(d) Coal can be drawn into wires.                                       ( )

Answers (1)

(a) Generally, non-metals react with acids.                       (F)

                -Non-metals do not react with acids (because they cannot donate an electron to hydrogen ion).

(b) Sodium is a very reactive metal.                                  (T)

                -Sodium reacts with water to liberate heat. That is why it is kept in kerosene.

(c) Copper displaces zinc from zinc sulphate solution.      (F)

                -Zinc is more reactive than copper. Hence, copper cannot displace zinc.

(d) Coal can be drawn into wires.                                       (F)

                - Coal is very brittle and breaks when force is applied.

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