MCQ
Which of the following compounds are covalent
- ✓${H_2}$
- B$CaO$
- C$KCl$
- D$N{a_2}S$
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$(a)\,N{H_4}N{O_2}\xrightarrow{\Delta }{N_2} + {H_2}O$
$(b)\,N{H_4}N{O_3}\xrightarrow{\Delta }{N_2}O + {H_2}O$
$(c)\,N{a_2}C{O_3}\xrightarrow{\Delta }N{a_2}O + C{O_2}$
$(d)\,N{H_4}Cl\xrightarrow{\Delta }N{H_3} + HCl$
$(a)$ saline hydrides produce $H_2$ gas when reacted with $H_2O.$
$(b)$ reaction of $LiAH_4$ with $BF_3$ leads to $B_2H_6.$
$(c)$ $PH_3$ and $CH_4$ are electron - rich and electron-precise hydrides, respectively.
$(d)$ $HF$ and $CH_4$ are called as molecular hydrides.

$(I)$ Cis $-[Co(NH_3)_2(en)_2]^{+3}$
$(II)$ Trans $-[Ir \,Cl_2\, (C_2O_4)_2]^{-3}$
$(III)$ $[Rh(en)_3]^{+3}$
$(IV)$ Cis $-[Ir(H_2O)_3Cl_3]$