(a)When common salt is added to water, it dissolves. Name the property which is exhibited by this activity. (b)The melting points of solids (A), (B), (C) and (D) are 50C, 250C, 110C and 160C respectively. Name the solid which has strongest inter particle forces of attraction. (c)Suppose you are going out on a hot summer day. Should you wear a cotton T-shirt or nylon T-shirt? Give reason also. (d)Which is more volatile: Liquid A (Boiling point 85C) or water (Boiling point 100C)?
The answers are as follows:
a) Solubility.
b) Higher the melting point higher will be the intermolecular force of attraction and so
solid B will have the strongest inter particular force of attraction.
c) Cotton T-shirts are favoured as they are light fabric and absorb the water evaporated from our body and keeps us. Also, they have small pores which allow fresh air to in and that keep us cool.
d) Lower the boiling point higher is the volatility. So, Liquid A is more volatile.
a) Solubility.
b) Higher the melting point higher will be the intermolecular force of attraction and so
solid B will have the strongest inter particular force of attraction.
c) Cotton T-shirts are favoured as they are light fabric and absorb the water evaporated from our body and keeps us. Also, they have small pores which allow fresh air to in and that keep us cool.
d) Lower the boiling point higher is the volatility. So, Liquid A is more volatile.