Question

Question 11 : Which of these is not true of a lattice?
It resembles a scaffold erected for the construction of a building
Lattice is present only in ionic solids
It is an arrangement of geometrical points in a definite pattern in space
A regular periodic arrangement of points in space
Question 12 : Which of the following is not a colligative property?
Increase in latent heat
Boiling point elevation
Freezing point depression
Vapour pressure lowering
Question 13 : A sample of a salt and water solution is homogeneous throughout. Is this sample a mixture or a pure substance?
a mixture, because it has a fixed, definite composition
a mixture, because it can have a variable composition
a pure substance, because it has a definite composition
a pure substance, since it is the same throughout

Answer 1

Question 11: Lattice is present only in ionic solids;

Question 12 : Increase in latent heat;

Question 13 : a pure substance, since it is the same throughout.