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Which of the following groups contains no ionic compounds?

A. HCN, NO2, Ca(NO3)2

B. PCl5, LiBr, Zn(OH)2

C. KOH, CCl4, SF4

D. CH2O, H2S, NH3

1 answer

I suppose the answer is D since all of the others contain ionic compounds; however, let me point out that CH2O, H2S and NH3 are polar and CH2O does have a small amount of ionic character since Ka is relatively large.
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