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B
KCl
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C
SO2
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D
NaOH
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Solution
The correct option is D
NaOH
CH4 and SO2 are covalent compounds because they have elements with nearly same electronegativity. KCl is a salt, thus ionic NaOH is actually Na+ held ionically to OH−. In OH−, O is covalently bonded to H. Thus, NaOH has covalent and ionic bond