set 3 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 4 EXERCISES
The following question based on acids, bases, salts and metals topic of general science mcq
List-I | List-II |
A. Blue vitriol | 1. Sodium bicarbonate |
B. Epsom salt | 2. Sodium hydroxide |
C. Baking soda | 3. Magnesium sulphate |
D. Caustic soda | 4. Copper sulphate |
(a) A-3; B-4; C-1; D-2
(b) A-3; B-4; C-2; D-1
(c) A-4; B-3; C-2; D-1
(d) A-4; B-3; C-1; D-2
The correct answers to the above question in:
Answer: (d)
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Read more chemistry ncert Based General Science Questions and Answers
Question : 1
What is anode mud ?
a) Impurities collected at anode in electrolysis during purification of metals
b) Fan of anode
c) Metal of anode
d) All of these
Answer »Answer: (a)
Question : 2
‘Alum’ is an example of –
a) double salt
b) acids
c) single salt
d) none of these
Answer »Answer: (a)
$K_2SO_4 + Al_2(SO_4)_3 .24H_2O$ ⟶ Alum
Question : 3
Bleaching powder is soluble in cold water giving a milky solution due to –
a) lime present in it
b) calcium carbonate formation
c) available chlorine
d) the absorption of carbon dioxide from atmosphere
Answer »Answer: (a)
Bleaching powder is actually a mixture of calcium hypochlorite CaOCl2 and the basic chloride CaCl2 with some slaked, Ca(OH)2 .
Question : 4
Which of the following statements regarding oxidation and reduction are correct?
- In oxidation, loss of electron takes place whereas in reduction, gain of electron takes place.
- In oxidation, gain of electron takes place whereas in reduction, loss of electron takes place.
- Oxidizing agent decreases the oxidation number but reducing agent increases the oxidation number.
- Oxidizing agent increases the oxidation number but reducing agent reduces the oxidation number.
a) 2 and 3
b) 1 and 3
c) 2 and 4
d) 1 and 4
Answer »Answer: (d)
Question : 5
Which of the following acid do not contain Oxygen?
a) Sulphuric Acid
b) Hydrochloric Acid
c) Nitric Acid
d) All of the above
Answer »Answer: (b)
Question : 6
Which one of the following is coated on the photographic plate?
a) Silver bromide
b) Silver chloride
c) Silver oxide
d) Silver iodide
Answer »Answer: (a)
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