set 1 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) Nitric acid and Hydrochloric acid
(b) Sulphuric acid and Hydrochloric acid
(c) Nitric acid and Sulphuric acid
(d) Citric acid and Benzoic acid
The correct answers to the above question in:
Answer: (a)
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Question : 1
Human stomach produces acid ‘X’ which helps in digestion of food. Acid ‘X’ is
a) hydrochloric acid
b) acetic acid
c) methanoic acid
d) citric acid
Answer »Answer: (a)
Question : 2
Which among the following statements with regard to pH scale is/are correct?
- It is a logarithmic scale.
- The scale is limited to 0-14 because the ionic product of water is about $10^{-14}$
- The lower the value of pH, the greater the acidity of the solution.
a) I and III only
b) I and II only
c) I, II and III
d) II only
Answer »Answer: (c)
Question : 3
Reaction of an acid with a base is known as –
a) combination
b) redox reaction
c) decomposition
d) neutralization
Answer »Answer: (d)
In a neutralization reaction an acid reacts with a base and forms salt and water.
Question : 4
Plaster of paris has the formula –
a) CaSO4 .H2O
b) CaSO4 .1½H2O
c) CaSO4 .½H2O
d) CaSO4 .2H2O
Answer »Answer: (c)
Question : 5
Why bases are kept in glass bottles?
a) Basic solutions are conducting in nature
b) Bases are corrosive in nature
c) Bases produce OH– ions in aqueous solutions
d) Basis have soapy texture
Answer »Answer: (b)
Question : 6
Which of the following is present in maximum amount in acid rain?
a) $HNO_3$
b) $H_2SO_4$
c) HCL
d) $H_2CO_3$
Answer »Answer: (b)
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