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9 Mar 2022
Salts of which of the following elements provide colours to fireworks?
(A) Chromium and nickel
(B) Strontiurn and barium
(C) Potassium and mercury
(D) Zinc and sulphur
Salts of which of the following elements provide colours to fireworks?
(A) Chromium and nickel
(B) Strontiurn and barium
(C) Potassium and mercury
(D) Zinc and sulphur
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