Which of the following compounds contain(s) no covalent bond(s)? KCl ,   PH 3 ,   O 2 ,   B 2…

1. $\mathrm{KCl},\mathrm{ }{\mathrm{B}}_2{\mathrm{H}}_6$
2. $\mathrm{KCl},\mathrm{ }{\mathrm{B}}_2{\mathrm{H}}_6,\mathrm{ }{\mathrm{PH}}_3$
3. $\mathrm{KCl},\mathrm{ }{\mathrm{H}}_2{\mathrm{SO}}_4$
4. $\mathrm{KCl}$

Solution

Asked in: JEE Main 2018 (08 Apr)

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