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JEE Main Chemistry question

ChemistryChemical Bonding and Molecular StructureJEE Main

How many of the following compound(s) contain(s) no covalent bond(s)? KCl, KCN, PH_3, O_2, B_2H_6, CO_2, H_2SO_4

Answer: 1

Solution

is purely ionic, with no covalent bonds. All the others contain at least one covalent bond: (C≡N covalent within the cyanide ion),

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Question ID VK-156881