MCQ
Which forms a crystal of $NaCl$
- A$NaCl$ molecules
- ✓$N{a^ + }$ and $C{l^ - }$ions
- C$Na$ and $Cl$ atoms
- DNone of the above
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

(Round off to the Nearest Integer).
[Given : Henry's law constant $= K _{ H }=8.0 \times 10^{4} kPa$ for $O _{2}$ Density of water with dissolved oxygen $=1.0\, kg\, dm ^{-3}$ ]
$(I)\,\, AgNO_3$
$(II)\,\, CaCO_3$
$(III) \,\,Pb(NO_3)_2$
$(IV) \,\,Na_2CO_3$