Question

Which of the following groups contains no ionic compounds?
(a) HCN , NO2 , Ca(NO3)2
(b) PCl5  , LiBr , Zn(OH)2
(C) NaH  , CCl4 , SF4
(d) KOH , CaF2 , NaNH2
(e) CH2O , H2S , NH3
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Answer 1

Answer:

E contains no ionic compounds. They're all covalently bonded.

hope it helps you...

Answer 2

The compounds formaldehyde, hydrogen sulfide, and ammonia are all covalent compounds. Hence option (e) has no ionic compounds.

• Formaldehyde(HCHO) is an organic compound belonging to the class of aldehydes. It has two C-H covalent bonds and a double bond between C and O.
• Hydrogen sulfide(H₂S) is a covalent compound with two covalent bonds between two hydrogens and sulfur. Sulfur and hydrogen share one electron each, forming a covalent bond.    
• Ammonia(NH₃) is a covalent molecule with three covalent bonds between nitrogen and three hydrogens.