Question

22. A single water molecule can form how many hydrogen bonds at a time

Answer 1

A single water molecule can participate in 4 hydrogen bonds because...it can make 2 bonds using the lone pairs on oxygen and also can donate 2 hydrogen atoms.

Answer 2

your answer

a single water molecule can form :-
$4 \: hydrogen \: bond$
because oxygen needs two electrons which are provided from hydrogen at the same time hydrogen can accept two electrons

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