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Q.

Salts of which of the following elements provide colours to fireworks ?

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a

Zinc and sulphur

b

Potassium and mercury

c

Strontium and barium

d

Chromium and nickel

answer is C.

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Detailed Solution

Strontium and barium salts are used to provide colours in fireworks. Barium gives green colour and strontium gives red colour to the firework.

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