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NEET levelSingle correct optionDifficulty 1 of 3mt056

Roasting zinc blende, $ZnS$ , in a plentiful supply of air gives which solid product?

A $ZnCl X_{2}$
B $ZnO$
C $ZnCO X_{3}$
D $Zn$

Answer: B

Roasting heats a sulphide ore in excess air below its melting point. The sulphide is oxidised:

2 ZnS + 3 O X_{2} 2 ZnO + 2 SO X_{2}

. The solid product is zinc oxide.

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