MEDIUM
10th CBSE
IMPORTANT
Earn 100

We have often noticed that a food containing oil or fat, if left for a long time i.e., stale food, develops a bad taste and bad smell. This is because the oils and fats in such foods get oxidised with the passage of time. The oxidation of oils or fats result into a bad smell and bad taste.
Read the above passage and answer the following question:
What is rancidity?

Important Questions on Chemical Reactions and Equations

MEDIUM
10th CBSE
IMPORTANT

We have often noticed that a food containing oil or fat, if left for a long time i.e. stale food, develops a bad taste and bad smell. This is because the oils and fats in such foods get oxidised with the passage of time. The oxidation of oils or fats result into a bad smell and bad taste.
Read the above passage and answer the following question:

State any two methods to prevent rancidity.

MEDIUM
10th CBSE
IMPORTANT

We have often noticed that a food containing oil or fat, if left for a long time i.e. stale food, develops a bad taste and bad smell. This is because the oils and fats in such foods get oxidised with the passage of time. The oxidation of oils or fats result into a bad smell and bad taste
Read the above passage and answer the following question:

Which method can be followed at home for the preservation of food ?

MEDIUM
10th CBSE
IMPORTANT
Why are decomposition reactions called the opposite of combination reactions? Give one example of each type.
MEDIUM
10th CBSE
IMPORTANT
Express the following facts in the form of a balanced chemical equation: When a strip of copper metal is placed in a solution of silver nitrate, metallic silver is precipitated and a solution of copper nitrate is formed.
EASY
10th CBSE
IMPORTANT
What do you mean by neutralisation reaction? Give one example.
MEDIUM
10th CBSE
IMPORTANT
What do you mean by precipitation reaction? Give an example.
MEDIUM
10th CBSE
IMPORTANT
What is rancidity? State two ways to prevent rancidity of food items.
MEDIUM
10th CBSE
IMPORTANT
What is corrosion? Write the reaction taking place during the corrosion of iron stating the conditions required? State two ways of preventing corrosion.