(A) Substances that are easily oxidised (like fats and oils in food) undergo rancidity when exposed to oxygen. To prevent this,food items are flushed

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Adding nitrogen and keeping them in airtight containers.

(A) Substances that are easily oxidised (like fats and oils in food) undergo rancidity when exposed to oxygen. To prevent this,food items are flushed with an inert gas like $N_2$ (nitrogen) to displace oxygen. Additionally,keeping them in airtight containers prevents further contact with atmospheric oxygen,thereby extending their shelf life.

Class 10 Science Chemical Reactions and Equations Mix Examples - Chemical Reactions and Equations

Medium

The substances which get oxidised easily can be kept for longer duration by:

A
Adding nitrogen and keeping them in airtight containers.
B
Adding nitrogen and keeping them in sun for few days.
C
Adding oxygen and keeping them in airtight containers.
D
Adding oxygen and keeping them in sun for few days.

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Chemical Reactions and Equations

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Mix Examples - Chemical Reactions and Equations

Translate the following statements into chemical equations and then balance them.
$(a)$ Hydrogen gas combines with nitrogen to form ammonia.
$(b)$ Hydrogen sulphide gas burns in air to give water and sulphur dioxide.

Medium

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Write true or false for the following statement:
The thermal decomposition reaction of calcium sulphate (gypsum) is used in black and white photography.

Easy

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Give the characteristic tests for the following gases:
$(a)$ $O_2$
$(b)$ $H_2$

Medium

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The colour formed on the surface of copper powder when it is heated in a china dish is:

Easy

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Name the oxidising and reducing agent in the following reaction:
$CuO + H_{2} \longrightarrow Cu + H_{2}O$

Easy

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The substances which get oxidised easily can be kept for longer duration by:

Similar Questions

Translate the following statements into chemical equations and then balance them.$(a)$ Hydrogen gas combines with nitrogen to form ammonia.$(b)$ Hydrogen sulphide gas burns in air to give water and sulphur dioxide.

Write true or false for the following statement:The thermal decomposition reaction of calcium sulphate (gypsum) is used in black and white photography.

Give the characteristic tests for the following gases:$(a)$ $O_2$$(b)$ $H_2$

The colour formed on the surface of copper powder when it is heated in a china dish is:

Name the oxidising and reducing agent in the following reaction:$CuO + H_{2} \longrightarrow Cu + H_{2}O$

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Translate the following statements into chemical equations and then balance them.
$(a)$ Hydrogen gas combines with nitrogen to form ammonia.
$(b)$ Hydrogen sulphide gas burns in air to give water and sulphur dioxide.

Write true or false for the following statement:
The thermal decomposition reaction of calcium sulphate (gypsum) is used in black and white photography.

Give the characteristic tests for the following gases:
$(a)$ $O_2$
$(b)$ $H_2$

Name the oxidising and reducing agent in the following reaction:
$CuO + H_{2} \longrightarrow Cu + H_{2}O$