set 2 MCQ Questions & Answers Detailed Explanation

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The following question based on acids, bases, salts and metals topic of general science mcq

Questions : Acid rain is caused due to _____________ .

(a) CO2 , NO2 , H2

(b) SO2 N2 , O2

(c) CO2 , O2 , SO2

(d) CO2 , SO2 , NO2

The correct answers to the above question in:

Answer: (d)

Acid rain is caused due to increased pollution in the air.

The poisonous gases like sulphur dioxide, carbon dioxide and nitrogen dioxide react with water to form sulphuric acid, carbonic acid and nitric acid respectively.

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Question : 1

Which of the following is ‘quicklime’ –

a) Ca(OH)2

b) CaCO3

c) CaO

d) CaCl2 .6H2O

Answer: (c)

Question : 2

Baking soda is

a) Sodium Dihydrogen Carbonate

b) Disodium Hydrogen Carbonate

c) Sodium Hydrogen Carbonate

d) Sodium Carbonate

Answer: (c)

Question : 3

Which of the following is a weak base ?

a) KOH

b) NH4OH

c) NaOH

d) none of these

Answer: (b)

NH4OH as it is not get completely ionized in aqueous solution.

Question : 4

Washing soda has the formula –

a) Na2CO3 .10H2O

b) Na2CO3 .H2O

c) Na2CO3 .7H2O

d) Na2

Answer: (a)

Question : 5

Which of the following statement is true?

a) Bases are sour in taste

b) The reaction between acid and a base is exothermic reaction

c) Acids are bitter in taste

d) The reaction between an acid and a base is endothermic reaction.

Answer: (b)

This reaction is exothermic.

i.e. Heat is evolved HCl + NaOH ⟶ NaCl + H2O + Heat

Question : 6

Which of the following compounds is basic in nature ?

a) CaCl2 .6H2O

b) NaCl

c) Ca(OH)2

d) CuSO4 .5H2O

Answer: (c)

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