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Alkali and Bases

Among the giv...

Question

Among the given substances, identify the one which is basic in nature.

A

Lemonade

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B

Tomato

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C

Toothpaste

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D

Vinegar

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Solution

The correct option is C Toothpaste
Lemonade, tomato, and vinegar contain acids in it hence they are acidic substances.
However, toothpaste contains a base called sodium carbonate. Hence, it is basic in nature.

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Q. The pH values of certain familiar substances are given below

Substance	pH value
Blood	7.4
Baking soda	8.2
Vinegar	2.5
Household ammonia	12

Analyse the data in the table and answer the following questions
a) Which substances are acidic in nature?
b) Which substances are basic in nature?

p H

values of certain substances are given below.

Substance	pH value
(1) Human blood	$7.4$
(2) Baking soda	$8.2$
(3) Vinegar	$2.5$
(4) Household Ammonia	$12.0$

(a) Which of the substances are acidic in nature?
(b) Which of the substances are basic in nature?

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Alkali and Bases

Standard VII Chemistry

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