set 4 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) the dissolved carbon dioxide of the ground water escapes into air
(b) carbon dioxide from air is dissolved in the water
(c) oxygen from air is dissolved in the water
(d) the dissolved oxygen of the ground water escapes into air
The correct answers to the above question in:
Answer: (b)
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Read more chemistry ncert Based General Science Questions and Answers
Question : 1
Which of the following is a strong acid:
a) Citric acid
b) Nitric acid
c) Acetic acid
d) Tartaric acid
Answer »Answer: (b)
As HNO3 is a mineral acid.
Question : 2
Which of the following acid is present in sour milk ?
a) lactic acid
b) citrus acid
c) glycolic acid
d) tartaric acid
Answer »Answer: (a)
Question : 3
Calamine solution contains
a) zinc carbonate
b) sodium hydrogen carbonate
c) zinc hydroxide
d) magnesium hydroxide
Answer »Answer: (a)
Question : 4
Which of the following is not required to find the pH of a given sample ?
a) Litmus paper
b) Universal indicator
c) pH paper
d) Standard pH chart
Answer »Answer: (a)
Litmus paper
[Note: Litmus paper does not give any information about the pH values].
Question : 5
When eno salt is poured into the water, bubbles forms, which is due to
a) $CO_2$ gas
b) CO gas
c) $O_2$ gas
d) $H_2$ gas
Answer »Answer: (a)
Question : 6
Natural indicator litmus is extracted from
a) earthworms
b) ants
c) lichens
d) algae
Answer »Answer: (c)
Natural indicator is obtained from lichens and is purple in colour. It turns acidic solution red and basic solution blue.
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