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) separating funnel
(b) sublimation
(c) distillation
(d) chromatography
The correct answers to the above question in:
Answer: (a)
As oil being less denser than water it forms upper layer. Thus mixture of oil and water can be separated by using separating funnel.
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Read more nature of matter and composition Based General Science Questions and Answers
Question : 1
The latest discovered state of matter is
a) plasma
b) solid
c) Bose-Einstein condensation
d) liquid
Answer »Answer: (a)
Question : 2
Wooden pencil used for writing contains
a) Salt
b) Graphite
c) Lead
d) Cane sugar
Answer »Answer: (b)
Question : 3
Brass is an example of
a) homogeneous mixture
b) element
c) compound
d) heterogeneous mixture
Answer »Answer: (a)
Brass is an alloy which is a homogeneous substance.
Question : 4
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 : 5
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 : 6
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)
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