Worksheet Solutions

Assertion (A) – Reason (R) based questions

Select the correct answer to these questions from the codes given below:

1. Both (A) and (R) are true but (R) is the correct explanation of the (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of the (A).
3. (A) is true but (R) is false.
4. (A) is false but (R) is true.

Questions

Assertion (A): Lemon juice can be used to clean tarnished copper.

Reason (R): Acids like citric acid in lemon juice can react with oxides on copper surfaces, making them shiny again.

Ans: a

Assertion (A): Flower Petals can be used as natural indicators.

Reason (R): Natural Indicators, like those found in flower petals, change color in response to changes in the acidity or alkalinity of a solution.

Ans: a