(a) Name one indicator which turns red on adding an acid.

(b) Name one indicator which turns red on adding a base.

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Solution

(a) Litmus (blue litmus paper)

(b) Turmeric

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Similar questions

(a) Name three acids used in the laboratory.

(b) Name one indicator that turns red on adding a base.

(c) Name the reaction when an acid is mixed with a base.

(d) Write the name of two indicators that occur naturally.

(e) Name three types of salts. Give one example of each type of salt.

Q. Solution A turns universal indicator blue to purple whereas solution B turns universal indicator orange to red.
(a) What will be the action of solution A on litmus?
(b) What will be action of solution B on litmus?
(c) Name any two substances which can give solutions like A.
(d) Name any two substances which can give solutions like B.
(e) What sort of reaction takes place when solution A reacts with solution B?

Solution A turns universal indicator blue to purple whereas solution B turns universal indicator orange to red.

(a) What will be the action of solution A on litmus?

(b) What will be action of solution B on litmus?

(d) Name any two substances which can give solutions like B.

(e) What sort of reaction takes place when solution A reacts with solution B?

Question 3

Turmeric is a natural indicator. On adding its paste to acid and base separately, which colours would be observed
(a) Yellow in both acid and base.
(b) Yellow in acid and red in base.
(c) Pink in acid and yellow in base.
(d) Red in acid and blue in base.

Q. Four drops of red litmus solutions were added to each one of the following substances.
Which one turns red litmus solution blue.

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(a) Name one indicator which turns red on adding an acid. (b) Name one indicator which turns red on adding a base.

(a) Litmus (blue litmus paper) (b) Turmeric

(a) Name one indicator which turns red on adding an acid.

(b) Name one indicator which turns red on adding a base.

(a) Litmus (blue litmus paper)

(b) Turmeric