Question

9. Many ionic crystals dissolve in water because
(a) water is an amphiprotic solvent
(b) water is high boiling liquid
(c) the process is accompained by positive heat of
solution
(c) water decreases the interionic attraction in the crystal
lattice due to solvation
10. Which one of the following has a giant covalent
structure?
(a) PbO2
(b) SiO2
(C) Naci
(d) AICI:
11. Which one of the following is a covalent molecule?
(a) Al_C16
(b) Al_03
(C) AIF
(d) All of these​

Answer 1

Answer:

9.a

10.a

11.b

I think this answers are correct

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