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Statement 1: A brown gas which intensifies on adding copper turnings in concentrate $H_{2} S O_{4}$ ; test for $N {O_{3}}^{-}$ .
Statement 2: Cu reacts with concentrate $H N O_{3}$ to give brown colored $N O_{2}$ gas

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Statement – 1 is true, statement – 2 is true; statement – 2 is a correct explanation for statement – 1.

Statement – 1 is true, statement – 2 is true; statement – 2 is NOT a correct explanation for statement – 1.

Statement – 1 is true, statement – 2 false.

Statement – 1 is false, statement – 2 true.

answer is A.

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Detailed Solution

On adding Cu turning brown color intensifies because it also convert $H N O_{3}$ into $N O_{2}$
$C u + H N O_{3} \to C u {(N O_{3})}_{2} + N O_{2} + O_{2}$

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