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Which of the following compounds contains(s) no covalent bond(s) ? KCl, PH 3 , O 2 , B 2 H 6 , H 2 SO 4

1. KCl, B 2 H 6 , PH 3
2. KCl, H 2 SO 4
3. KCl
4. KCl, B 2 H 6 Students may find similar question in CP exercise sheet : [ JEE Main, Chapter : Chemical Bonding, Ex # 1, Q. No. 37 ]

Correct answer: KCl

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