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Question-1
Sodium sulphate is

(A) An acid	(B) A base
(C) An alkali	(D) A salt

Question-2
Sodium carbonate is not used in

(A) Softening of water	(B) Manufacture of cement
(C) Detergents	(D) Manufacture of glass

Question-3
The reaction between an acid and a base is known as

(A) Neutralisation	(B) Addition
(C) Substitution	(D) Displacement

Question-4
What happens when a CO₂ fire extinguisher cylinder is inverted and the stopper is opened by pushing the plunger ?

(A) An explosion takes place	(B) CO₂ will comes out
(C) Water comes out	(D) Nothing will happen

Question-5
Which is known as plaster of paris ?

(A) CaSO₄.5H2O	(B) CaSO₄.3H2O
(C) CaSO₄.3/2H2O	(D) CaSO₄.1/2H₂O

Question-6
The substance which indicates the presence of acid or base by change of its smell is known as :

(A) household indicator	(B) acid-base indicator
(C) olfactory indicator	(D) none of these

Question-7
Metals react with dilute acids to give metal salts and

(A) Water	(B) Oxygen
(C) CO₂	(D) H₂

Question-8
A solution reacts with crushed egg-shells to give a gas that turns lime-water milky. The solution contains

(A) NaCl	(B) HCl
(C) LiCl	(D) KCl

Question-9
Which base is used to neutralise the excess acid in the stomach?

(A) Nitric acid	(B) Formic acid
(C) Citric acid	(D) Antacid

Question-10
A house wife found that the bread prepared by her is hard and small in size, which ingredient has she forgotten to add?

(A) Na₂CO₃	(B) NaOH
(C) NaHCO₃	(D) Na₂O

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Std 10

CBSE

Practice in Related Chapters
Acids, Bases and Salts
Metals and Non-metals
Periodic Classification of Elements
Carbon and its Compounds
Chemical Reactions and Equations