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) Oxalic acid
(b) Acetic acid
(c) Citric acid
(d) Hydrochloric acid
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
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 : 2
Acids and bases are important because of
a) their effects on human health
b) their effect on farmer’s crop
c) their use in industry
d) all the above are correct.
Answer »Answer: (d)
All the above are correct.
Question : 3
Which chemical compound is present in Bleaching Powder?
a) Calcium Oxychloride
b) Calcium Carbonate
c) Calcium Hydroxide
d) Ammonium Chloride
Answer »Answer: (a)
Question : 4
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)
Question : 5
The following equation is an example of a redox reaction, in which Cl2 is the oxidizing agent and FeBr3 is the reducing agent :
2FeBr3 (aq) + 3Cl2 (g) = 2FeCl 3(aq) + 3Br2 (1)
Which one among the following statements is incorrect for this redox reaction?
a) Reducing agents are themselves oxidized
b) Oxidizing agents are themselves reduced
c) Reducing agents gain or appear to gain electrons
d) Oxidizing agents oxidize other substances
Answer »Answer: (c)
Question : 6
When a few drops of lemon are mixed with milk
- It turns sour
- No change takes place
- Properties of milk are changed
- Properties of milk remain the same
a) (i) and (ii)
b) (i) and (iii)
c) (ii) and (iii)
d) (i) only
Answer »Answer: (b)
When lemon juice is mixed with milk the milk turns sour and changes into 'paneer'.
The properties of milk are completely different from that of 'paneer'.
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