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
- 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
The correct answers to the above question in:
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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Read more chemistry ncert Based General Science Questions and Answers
Question : 1
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 : 2
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 : 3
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 : 4
Select the one that is having pH < 7.
a) lime water
b) human blood
c) lime juice
d) antcid.
Answer »Answer: (c)
Lime juice [Hint : Lime juice is acidic so its pH < 7.].
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