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

Get top class preparation for CBSE right from your home: fully solved questions with step-by-step explanation- practice your way to success.

Download PDF of This Page (Size: 292K)

Question 1:

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

Answer:

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.

Image shows ph scale

PH Scale

Question 2:

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

Answer:

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

Answer:

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

Answer:

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.

Answer:

  1. Sulphuric acid + Zinc → Zinc sulphate + Hydrogen

  1. Hydrochloric acid + Magnesium → Magnesium chloride + Hydrogen

  1. Sulphuric acid + Aluminium → Aluminium sulphate + Hydrogen

  1. Hydrochloric acid + Iron → Ferric chloride + Hydrogen

Developed by: