Give one example of each of the following.
(a) A non-metal which is lustrous
(b) A non-metal which is liquid at room temperature
(c) A metal which is soft

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Solution

(a) Iodine
Non-metals are generally non-lustrous but iodine shows an exceptional behaviour by being a lustrous non-metal.
(b) Bromine
Non-metals generally exist in solid or gaseous state at room temperature but bromine is an exceptional non-metal that exists in liquid state.
(c) Sodium
Metals are generally hard but sodium is a metal which is soft.

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