Question

Match the following

Column 1	Column 2
Boiling point of pure water	100$°$C
Temperature of maximum density of water	4$°$C
Latent heat of fusion	336 J/g
Aerated water	Water containing dissolved carbon dioxide

Answer 1

(A) Boiling point of pure water- (I) 100$°$C

• The temperature at which a liquid starts converting into its vapor state on heating is called the boiling point of the liquid.
• For water, the boiling point is 100$°$C.
• On heating to 100$°$C, water starts boiling and forms steam (water vapor).

(B) Temperature of maximum density of water- (II) 4$°$C

• The density of water is the mass of water per unit volume.
• Water has a unique property such that, it has maximum density at 4$°$C. Density increases from 0$°$C to 4$°$C and then again decreases after 4$°$C.

(C) Latent heat of fusion- (III) 336 J/g

• Latent heat is the heat required to change the state of a substance, without any temperature change.
• Latent heat of fusion is the amount of heat required in Joules to convert 1 Kilogram of solid to liquid without any change in the temperature.
• The value of latent heat of fusion is 3.36 × 10⁵ J/Kg or 336 J/g.

(D) Aerated water- (IV) Water containing dissolved carbon dioxide

• Water containing dissolved carbon dioxide gas is known as aerated water.
• Here the solvent is water (or any other liquid) and the solute is carbon dioxide.
• Example: soda water

(A) Boiling point of pure water	(I) 100$°$C
(B) Temperature of maximum density of water	(II) 4$°$C
(C) Latent heat of fusion	(III) 336 J/g
(D) Aerated water	(IV) Water containing dissolved carbon dioxide