It is recommended that liquor ammonia botthe should be opened after cooling it in ice for sometime. This is because liquor ammonia:
(I) The principal reducing product is NO gas
(II) Cu metal is oxidised to Cu²⁺ (aq.) ion which is blue in colour.
(III) NO is paramagnetic and has one unpaired electron in antibonding molecular orbital
(IV) No reacts with O₂ to produce NO₂ which is linear in shape
Choose the correct statements:

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I, II, III

I, III

II, IV

All the above

answer is A.

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Detailed Solution

It is recommended that liquor ammonia bottle should be opened after cooling it in ice for sometime. This is because liquor ammonia:
(I) The principal reducing product is NO gas
(II) Cu metal is oxidised to Cu²⁺ (aq.) ion which is blue in colour.
(III) NO is paramagnetic and has one unpaired electron in antibonding molecular orbital

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