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KEAM 2014 Physics and Chemistry Paper

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Question : 105

Total: 120

Which of the following are isoelectronic species?
(i) NH3 (ii) CH3+ (iii) NH2− (iv) NH4+
Choose the correct answer from the codes given below

(i), (ii) , (iii)
(ii), (iii), (iv)
(i), (ii), (iv)
(i), (iii), (iv)
(ii), (iii)

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