acids, bases, salts and metals - Category wise Question and Answer Practice Test with Solutions

acids, bases, salts and metals PRACTICE TEST [4 - EXERCISES]

set 1

set 2

set 3

set 4

Question : 6

Acid rain is caused due to _____________ .

a) CO2 , NO2 , H2

b) SO2 N2 , O2

c) CO2 , O2 , SO2

d) CO2 , SO2 , NO2

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.

Question : 7

Which of the following is ‘quicklime’ –

a) Ca(OH)2

b) CaCO3

c) CaO

d) CaCl2 .6H2O

Answer: (c)

Question : 8 [PCS (Pre) 2016]

Baking soda is

a) Sodium Dihydrogen Carbonate

b) Disodium Hydrogen Carbonate

c) Sodium Hydrogen Carbonate

d) Sodium Carbonate

Answer: (c)

Question : 9

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 : 10

Common salt besides being used in the kitchen can also be used as the raw material for making

  1. Washing soda
  2. Bleaching powder
  3. Baking soda
  4. Slaked lime

a) (i), (ii) and (iv)

b) (i) and (iii)

c) (i) and (ii)

d) (i), (iii) and (iv)

Answer: (b)

$NaCl + H_2O + CO_2 + NH_3 ⟶ NH_4Cl + {NaHCO_3} ↙\text"Baking soda"$

$2NaHCO_3 ⟶↖\text"heat" Na_2CO_3 + H_2O + CO_2$

$\text"Na_2CO_3"↙\text"Sodium carbonate" + 10 H_2O ⟶ {Na_2CO_3 10 H_2O} ↙\text"Hydrated sodium carbonate (washing soda)"$

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1691 acids bases salts and metals based general science mcq set 2 question answer with explanation pdf
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