# NCERT Class X Science Solutions: Chapter 2 – Acids, Bases and Salts Part 1

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Question 1:

A solution turns red litmus blue, its pH is likely to be

D. Bases turn red litmus blue and acids turn blue litmus red. Basic solution has a pH value more than 7. Since the solution turns red litmus blue, its is likely to be 10.

Question 2:

A solution reacts with crushed egg-shells to give a gas that turns lime-water milky. The solution contains.

B. The solution contains

Question 3:

Of a solution of is found to be completely neutralised by of a given solution of If we take of the same solution of, the amount of solution (the same solution as before) required to neutralise it will be

Dsolution will be required.

Question 4:

Which one of the following types of medicines is used for treating indigestion?

1. Antibiotic

2. Analgesic

3. Antacid

4. Antiseptic

C. Antacid is used for treating indigestion.

Question 5:

Write word equations and then balanced equations for the reaction taking place when

1. Dilute sulphuric acid reacts with zinc granules.

2. Dilute hydrochloric acid reacts with magnesium ribbon.

3. Dilute sulphuric acid reacts with aluminium powder.

4. Dilute hydrochloric acid reacts with iron filings.