set 3 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 3 EXERCISES
The following question based on nature of matter and composition topic of general science mcq
(a) formaldehyde
(b) acetone
(c) benzene
(d) acetic acid
The correct answers to the above question in:
Answer: (b)
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Read more nature of matter and composition Based General Science Questions and Answers
Question : 1
The chemical formula for 'laughing gas' is
a) N$O_2$ (Nitrogen dioxide)
b) $N_2$O(Nitrous oxide)
c) NO (Nitric oxide)
d) $N_2O_5$ (Nitrogen pentoxide)
Answer »Answer: (b)
Question : 2
What type of mixture is smoke?
a) Liquid mixed with a gas
b) Solid mixed with a gas
c) Gas mixed with a gas
d) Gas mixed with a liquid and a solid
Answer »Answer: (d)
Question : 3
Select the one that is not a chemical change ?
a) Dissolution of oxygen in water.
b) Dissolution of carbon dioxide in water.
c) Dissolution of ammonia in water.
d) None of these is a chemical change.
Answer »Answer: (a)
Oxygen is insoluble in water.
Question : 4
Which chemical was an important symbol in our freedom struggle ?
a) Medicine
b) Glucose
c) Fertilizer
d) Sodium chloride
Answer »Answer: (c)
Question : 5
Boyle’s law states that the
a) volume is directly proportional to the temperature at constant pressure
b) pressure of a gas is directly proportional to the temperature at constant volume
c) pressure of a gas is inversely proportional the volume at constant temperature
d) None of the above
Answer »Answer: (c)
Question : 6
Melting points can separate materials because
a) heat causes molecules to disintegrate
b) molecules vibrate rapidly when heated
c) substances melt at different temperatures
d) many substances fuse at the melting point
Answer »Answer: (c)
Different pure solid substances melts at a different temperatures.
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