Which of the following statements are correct about the reaction be...

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Which of the following statements are correct about the reaction between the copper metal and dilute \( \mathrm{HNO}_{3} \) ?
(I) The principal reducing product is \( \mathrm{NO} \) gas
(II) Cu metal is oxidised to \( \mathrm{Cu}^{2+}(a q \).\( ) ion which is blue in colour. \)
\( \mathrm{P} \)
(III) NO is paramagnetic and has one unpaired electron in antibonding molecular orbital
(IV) NO reacts with \( \mathrm{O}_{2} \) to produce \( \mathrm{NO}_{2} \) which is linear in shape
Choose the correct statements:
(a) I, II, III
(b) IoII
(c) II, IV
(d) All the above
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