Name the following metals.
(i) A metal present in cryolite other than sodium.
(ii) A metal which is unaffected by dilute or concentrated acids.
(iii) A metal present in period 3, group 1 of the periodic table.

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Solution

(i) Cryolite is Na₃AlF₆(sodium hexafluoro aluminate) therefore other than sodium, it also contains Aluminium.
(ii) Platinum is a metal that is unaffected by dilute or concentrated acids
(iii) Sodium is a metal present in period 3, group 1 of the periodic table.

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