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
(a) their effects on human health
(b) their effect on farmer’s crop
(c) their use in industry
(d) all the above are correct.
The correct answers to the above question in:
Answer: (d)
All the above are correct.
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Read more chemistry ncert Based General Science Questions and Answers
Question : 1
Which chemical compound is present in Bleaching Powder?
a) Calcium Oxychloride
b) Calcium Carbonate
c) Calcium Hydroxide
d) Ammonium Chloride
Answer »Answer: (a)
Question : 2
Why bases are kept in glass bottles?
a) Bases are corrosive in nature
b) Bases produce OH– ions in aqueous solutions
c) Basic solutions are conducting in nature
d) Bases have soapy texture
Answer »Answer: (a)
Question : 3
The hypo solution used in photography is an aqueous solution of
a) Sodium tetrathionate
b) Sodium sulphate
c) Sodium thiosulphate
d) Ammonium per sulphate
Answer »Answer: (c)
Question : 4
Aluminium is used in thermite welding because –
a) aluminium is a strong oxidising agent
b) aluminium is a light metal
c) aluminium has more affinity for oxygen
d) aluminium is a reactive metal
Answer »Answer: (c)
Question : 5
The presence of which of the following acid causes indigestion:
a) Oxalic acid
b) Acetic acid
c) Citric acid
d) Hydrochloric acid
Answer »Answer: (d)
Question : 6
Match List-I with List-II:
| List-I | List-II |
| A. Washing soda | 1. Sodium Hydroxide |
| B. Caustic soda | 2. Copper Sulphate |
| C. Neela thotha | 3. Sodium Thiosulphate |
| D. Hypo | 4. Sodium Carbonate |
a) 4 1 2 3
b) 4 2 3 1
c) 1 3 4 2
d) 3 2 1 4
Answer »Answer: (a)
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