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) hydrochloric acid
(b) acetic acid
(c) methanoic acid
(d) citric acid
The correct answers to the above question in:
Answer: (a)
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Question : 1
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 : 2
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 : 3
Antacids contain –
a) weak acid
b) strong base
c) weak base
d) strong acid
Answer »Answer: (c)
Antacids are weak bases which are given when a patient is suffering from acidity. These antacids neutralises the acid and give relief to patient.
Question : 4
Goldsmiths uses aqua regia, which is prepared by mixing
a) Nitric acid and Hydrochloric acid
b) Sulphuric acid and Hydrochloric acid
c) Nitric acid and Sulphuric acid
d) Citric acid and Benzoic acid
Answer »Answer: (a)
Question : 5
Plaster of paris has the formula –
a) CaSO4 .H2O
b) CaSO4 .1½H2O
c) CaSO4 .½H2O
d) CaSO4 .2H2O
Answer »Answer: (c)
Question : 6
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)
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