Subjects
Science TNSB Mentoring
Class 9
Acids, bases and salts
Classification of acids

7. Acids and bases in our daily life

Question:

4 m.

1. Which of the following products contains lactic acid?

Curd
Lemon
Vinegar
Grapes
None of these

2.

In nature, the toothpaste we use is a base. What is the reason for this?

It neutralizes the acids in the mouth.
It increases acid content in the mouth.
Bases protect the inner layers of teeth.
Bases are non-reactive with the skin.
None of these

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