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NEET levelSingle correct optionDifficulty 1 of 3mt121

Blister copper has a blistered surface because

Acarbon dioxide is released by the decomposition of carbonates
Bsteam escapes from the hydrated ore
Coxygen is evolved when the metal cools
D $SO X_{2}$ dissolved in the molten metal escapes during solidification

Answer: D

In the Bessemer converter

Cu X_{2} S

and

Cu X_{2} O

react to give copper and

SO X_{2}

. Some

SO X_{2}

remains dissolved in the melt and bursts out on solidification, leaving blisters.

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