Question

1. Blue litmus paper is dipped in a solution and it remains blue. What is the

chemical nature of the solution? Explain .

2. Name any four sour substances used in our everyday life.

3. Name the acid present in curd?

4. Identify the organisms given in the picture below and name the acid present in

their sting? UI​

Answer 1

1. Blue litmus paper is dipped in a solution and it remains blue. What is the

chemical nature of the solution? Explain .

2. Name any four sour substances used in our everyday life.

3. Name the acid present in curd?

4. Identify the organisms given in the picture below and name the acid present in

their sting? UI

Answer 2

1. Either neutral or basic
2. tomato, vinegar, soap, antacids
3. lactic acid
4. Bee/ant, formic acid