Match the statements in column A with those in column B.

Column 1 Column 2

Crushing of an ice cube

Heat

Making of curd from milk

Physical change

Plants making their food during sun-shine

Rusting

The energy given-out/ absorbed during a chemical change

Photosynthesis

Iron gets coated with brown powdery deposit in moist air

Chemical Change

Column 1	Column 2
Crushing of an ice cube	Heat
Making of curd from milk	Physical change
Plants making their food during sun-shine	Rusting
The energy given-out/ absorbed during a chemical change	Photosynthesis
Iron gets coated with brown powdery deposit in moist air	Chemical Change

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Solution

1. Crushing of an ice cube- (b) Physical change
The crushing of ice is considered a physical change as there is no formation of a new compound. Ice is made up of water molecules and after crushing it, it is still made up of water molecules.
2. Making of curd from milk- (e) Chemical Change
Making of curd from milk is a chemical change as a new product is getting formed that is different from the reactant being used.
3. Plants making their food during sun-shine- (d) Photosynthesis
Plants use sunlight to make their food with the help of other substances like carbon dioxide, and water in the chlorophyll part of the leaves. This process is known as photosynthesis. The reaction involved in this process is written below-
$6 {CO}_{2} + 6 H_{2} O \overset{sunlight}{\to} C_{6} H_{12} O_{6} + 6 O_{2}$
4. The energy given out/ absorbed during a chemical change-(a) Heat
Heat can be absorbed or released during a chemical reaction.
5. Iron gets coated with the brown powdery deposit in moist air- (c) Rusting
The chemical change that converts the iron into brown-colored powder in moist air is referred as rusting. Due to this the strength of the iron decreases and eventually, it becomes useless.
Hence, the correct matches are listed below:
Column A Column B
1. Crushing of an ice cube (b) Physical Change
2. Making of curd from milk (e) Chemical Change
3. Plants making their food during sun-shine (d) Photosynthesis
4. The energy given out/ absorbed during a chemical change (a) Heat
5. Iron gets coated with the brown powdery deposit in moist air (c) Rusting

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Match the statements in Column A with those in Column B.

$\begin{matrix} Column A & Column B 1. & A metal which reacts with cold water to form hydrogen. & 1. & Reduction. 2. & A gas which is inflammable and a non-supporter of combussion. & 2. & Hydrogenation. 3. & A process in which vanaspati ghee is prepared from vegetable oils. & 3. & Oxidation. 4. & The removalof hydrogen or addition of oxygen. & 4. & Sodium. 5. & The addition of hydrogen or removal of oxygen. & 5. & Hydrogen. \end{matrix}$

Match the statements in Column A, with those in Column B :

Column 1	Column 2
The process due to which a liquid changes to gaseous state at a fixed temperature by the absorption of heat energy.	Rise in temperature
A change takes place in a substance on the absorption of heat energy when no change of the state or dimensions takes place.	Sublimation
A process due to which a solid directly changes to gaseous state on the absorption of heat energy.	Evaporation
The process due to which certain substances burn in air or oxygen releasing a large amount of heat energy.	Vaporisation
The process of change of liquid into gas at any temperature.	Combustion.

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Column A	Column B
1. Crushing of an ice cube	(b) Physical Change
2. Making of curd from milk	(e) Chemical Change
3. Plants making their food during sun-shine	(d) Photosynthesis
4. The energy given out/ absorbed during a chemical change	(a) Heat
5. Iron gets coated with the brown powdery deposit in moist air	(c) Rusting