set 1 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) Cooking of food
(b) Freezing of water
(c) Melting of wax
(d) None of these
The correct answers to the above question in:
Answer: (a)
Chemical changes are irrerversible in nature.
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Read more nature of matter and composition Based General Science Questions and Answers
Question : 1
The oxide of which of the following elements is used as a coolant?
a) Carbon
b) Silicon
c) Nitrogen
d) Phosphorus
Answer »Answer: (a)
Question : 2
Which one among the following is not a mixture?
a) Brass
b) Graphite
c) Glass
d) Steel
Answer »Answer: (b)
Question : 3
A sample contains two substances and has uniform properties. The sample is
a) an element
b) a heterogeneous mixture
c) a compound
d) a homogeneous mixture
Answer »Answer: (d)
Homogeneous mixture is a solution having uniform composition and properties throughout.
Question : 4
Which one of the following is correct? Butter is
a) a molecular solid
b) a supercooled oil
c) an emulsion
d) None of these
Answer »Answer: (d)
Question : 5
Camphor can be purified by
a) sedimentation
b) filtration
c) distillation
d) sublimation
Answer »Answer: (d)
Camphor being a sublime substance can be purified by sublimation.
Question : 6
What is the term used to denote the critical temperature at which the air becomes saturated with vapour and below which the condensation is likely to begin ?
a) Dew point
b) Condensation point
c) Evaporation point
d) Point of critical temperature
Answer »Answer: (a)
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