Which of the following compounds

Question:

Which of the following compounds contain(s) no covalent bond(s)?]

$\mathrm{KCl}, \mathrm{PH}_{3}, \mathrm{O}_{2}, \mathrm{~B}_{2} \mathrm{H}_{6}, \mathrm{H}_{2} \mathrm{SO}_{4}$

  1. $\mathrm{KCl}, \mathrm{H}_{2} \mathrm{SO}_{4}$

  2. $\mathrm{KCl}$

  3. $\mathrm{KCl}, \mathrm{B}_{2} \mathrm{H}_{6}$

  4. $\mathrm{KCl}, \mathrm{B}_{2} \mathrm{H}_{6}, \mathrm{PH}_{3}$


Correct Option: , 2

Solution:

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