A gas (X) is obtained when copper reacts with dilute `HNO_(3)`. The gas thus formed reacts with oxygen to give brown fumes of (Y). (Y) when dissolved in water gives an important acid (Z) and the gas (X). X, Y and Z respectively are

Options

A. `NO, NO_(2), HNO_(3)`
B. `NO_(2), NO, HNO_(3)`
C. `N_(2)O, NO, HNO_(2)`
D. `NO, N_(2)O, HNO_(3)`

Answer

A

Explanation

`3Cu+8HNO_(3("dil"))rarr3Cu(NO_(3))_(2)+underset("(X)")(2NO)+4H_(2)O`
`2NO+O_(2) hArr underset("(Y)")(2NO_(2))`
`underset("(Y)")3NO_(2)+H_(2)Orarrunderset("(Z)")(2HNO_(3))+underset("(X)")(NO)`