Question

3. A red litmus paper turned blue when you
kept it in a test tube containing
*
Vinegar
Curd
Soap Water
Lemon Juice​

Answer 1

It's correct answer is soap water

As, Soap is a combination of a weak acid (fatty acids) and a strong base (lye) , which results in what is known as “alkalai salt,”

And, When red litmus paper comes into contact with any alkaline substance, it turns blue

Answer 2

Answer:

soap water

Explanation:

as its basic .