Q.4 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. ( )

a) Generally, non-metals react with acids. ( F )
b) Sodium is a very reactive metal. ( T )
c) Copper displaces zinc from zinc sulphate solution. ( F )
d) Coal can be drawn into wires. ( F )

EXPLANATION :

a) Generally, non-metals react with acids. This statement is not true because when a substance reacts with acids it provides electrons to the H+ ions produced by the acids. Non-metals are acceptors of electrons and hence, they cannot donate electrons.

b) Sodium is a very reactive metal. This statement is true because sodium is quite reactive with air and its reactivity is a function of the relative humidity or water-vapour content of the air. The corrosion of solid sodium by oxygen is accelerated by the presence of small amounts of impurities in the sodium.

c) Copper displaces zinc from zinc sulphate solution. This statement is not true because copper is less reactive than zinc and hence cannot displace zinc from its solution.

d) Coal can be drawn into wires. This statement is not true because coal is mostly composed of carbon which is ultimately a non-metal. As non-metals doesn't show ductility hence coal cannot be drawn into wires and if stretched, it breaks.