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Q.

Which of the following statements is correct?

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a

In gaseous state, HNO3 is an angular molecule

b

NO2 gas is produced  by the reaction of copper metal with dilute nitric acid.

c

With dil. HNO3, Zn gives NO gas

d

Nitric acid does not oxidize gold and platinum

answer is D.

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Detailed Solution

In gaseous state, HNO3 is a planar molecule. With dil. HNO3. Zn produces N2O, while Cu produces NO gas.3Cu+8HNO3 (dil.) ⟶3CuNO32+2NO+4H2O4Zn+10HNO3( dil. )⟶4ZnNO32+5H2O+N2ONO2 gas is produced by the action of concentrated nitric acid on metal.Cu+4HNO3 (conc.)→CuNO32+2NO2+2H2O
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Which of the following statements is correct?