Soln:

a) Standard solution is any solution of known concentration.

b) There are two types of standard solution

i. Primary standard solution.
ii. Secondary standard solution.

c) Characteristic of good standard solution (primary)

i. The solution should have a high molecular weight.
ii. Should be very pure.
iii. Should not change with a degree of hydration.
iv. Should not be affected in air when weighing.
v. Should be available.