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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