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) an element
(b) a heterogeneous mixture
(c) a compound
(d) a homogeneous mixture
The correct answers to the above question in:
Answer: (d)
Homogeneous mixture is a solution having uniform composition and properties throughout.
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Question : 1
The process used to separate oil and water is
a) separating funnel
b) distillation
c) sublimation
d) chromatography
Answer »Answer: (a)
Question : 2
Magnetism is most beneficial for separating
a) non-metallic solids and solids such as sulfur
b) magnetic solids and solids such as sulfur
c) gases and non-metallic liquids
d) non-magnetic solids from non-magnetic liquids
Answer »Answer: (b)
Magnetism is useful for separation of magnetic and nonmagnetic substances.
Question : 3
Which one of the following is not a mixture?
a) Baking soda
b) Tootpaste
c) Toilet soap
d) Vinegar
Answer »Answer: (a)
Question : 4
Which one among the following is not a mixture?
a) Brass
b) Graphite
c) Glass
d) Steel
Answer »Answer: (b)
Question : 5
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 : 6
Select the one that is a chemical change.
a) Cooking of food
b) Freezing of water
c) Melting of wax
d) None of these
Answer »Answer: (a)
Chemical changes are irrerversible in nature.
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