(a) State any three differences between the physical properties of metals and non-metals.(b) Differentiate between metals and non-metals on the basis of their chemical properties.
(c) State three reasons (of which at least one must be chemical) for believing that sodium is a metal.
(d) State three reasons (of which at least one must be chemical) for believing that sulphur is a non-metal.
(e) Which non-metal has been placed in the reactivity series of metals?

Academic Chemistry NCERT Class 10

(a) Differences between metals and non-metals on the basis of their physical properties are given below:

Metals are malleable whereas non-metals are non-malleable.
Metals are ductile whereas non-metals are non-ductile
Metals are good conductors of electricity whereas non-metals are bad conductors of electricity

(b) Differences between metals and non-metals on the basis of their chemical properties are given below:

Metals form basic oxides whereas non-metals form acidic or neutral oxides.
Metals displace hydrogen from water whereas non-metals form acidic or neutral oxides.
Metal displace hydrogen from dilute acids whereas non-metals do not react with dilute acids.

(c) Sodium is found in solid-state. It conducts electricity and forms basic oxides. Therefore, Sodium is a metal.

(d) Sulphur is a brittle solid. It is a non-conductor of electricity and forms acidic oxides. Therefore, Sulphur is a non-metal.

(e) Hydrogen is the non-metal which is placed in the reactivity series of metals.

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Updated on: 10-Oct-2022

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