Balbharati Class 8 General Science Solutions Introduction to Acid and Base

Welcome to NCTB Solutions. Here with this post we are going to help 8th class students for the Solutions of Balbharati Class 8 General Science Book Chapter 12, Introduction to Acid and Base. Here students can easily find step by step solutions of all the questions in Introduction to Acid and Base. Also our Expert Science Teacher’s solved all the problems with easily understandable language with proper guidance so that all the students can understand easily. Here in this post students will get chapter 12 solutions. Here all the Question Answer are based on Balbharati latest syllabus. Here all the question and answer are based on Maharashtra State Board latest syllabus.

Introduction to Acid and Base Exercise question Solutions :

Question no – (2)

Answer :

(a) H₂SO₄ → Sulphuric Acid.

(b) Ca(OH)₂ → Calcium Hydroxide.

(c) HCl → Hydrochloric Acid.

(d) NaOH → Sodium Hydroxide.

(e) KOH → Potassium Hydroxide.

(f) NH₄O → Ammonium Hydroxide.

Question no – (3)

Answer :

Sulphuric Acid has highest importance in chemical industry because it can be used in many different ways like in the production of chemical fertilizers, explosives, medicines, dyes and paints. It is also used in batteries in its diluted form.

Question no – (4)

Answer :

(a) HCL or Hydrochloric Acid is used for getting chloride salt.

(b) Sodium Bicarbonate is present in the rock, the acid reacts with the carbonate to release carbon dioxide which turns lime water milky.

(c) In order to find out if the chemical is acid or base we can use various indicators like litmus papers, phenolphthalein, methyl orange, methyl red or natural home made indicators that by changing its original color let us understand if its acid or base by comparing it with the known color change pattern.

Question no – (5)

Answer :

(a) Differences between acid and base are as follows :

Acid :

Acids are sour in taste.
They contain Hydrogen ion as a main constituent.
It turns blue litmus red.

Base :

Bases are bitter in taste.
They contain Hydroxide Ion as a main constituent.
It turns red litmus blue.

(b) An indicator does not get affected by salt because salt is neither an acid nor a base.

(c) Salts and water are produced by neutralization process.

(d) Acids are used in industries to produce battery, chloride salts, dyes, explosives, paints, sterilize water and to make white paper from wood pulp.

Question no – (6)

Answer :

(a) Main constituent of acid is Hydrogen Ion(H+)

(b) Main constituent of base is Hydroxide Ion(OH-)

(c) Tartaric acid is a Weak acid.

Question no – (7)

Answer :

(1) Tamarind → (c) Tartaric Acid

(2) Curd → (d) Lactic Acid

(3) Lemon → (b) Citric Acid

(4) Vinegar → (a) Acetic Acid.

Question no – (8)