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) Proust
(b) Michael Faraday
(c) Lavoisier
(d) Linus Pauling
The correct answers to the above question in:
Answer: (c)
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Question : 1
In which one of the following situations a chemical reaction does not occur?
a) Sodium is placed in water
b) Common salt is exposed to air
c) Coal is burnt in air
d) Iron is kept in moist air
Answer »Answer: (b)
Question : 2
Which one of the following is used in the preparation of antiseptic solution?
a) Iodine chloride
b) Potassium nitrate
c) Iodine
d) Potassium chloride
Answer »Answer: (c)
Question : 3
Which one among the following statements regarding the properties of mixtures and compounds is not correct?
a) The constituents of a mixture can be separated by physical methods but those of a compound cannot be separated by physical methods
b) A mixture shows the properties of its constituents but the properties of a compound are entirely different from its constituents
c) A mixture may be homogeneous or heterogeneous but a compound is a homogeneous substance
d) Energy is either absorbed or evolved during the preparation of a mixture but not in the preparation of a compound
Answer »Answer: (d)
Question : 4
At higher altitudes
a) no change in boiling point
b) boiling point of a liquid increases
c) boiling point of a liquid decreases
d) melting point of solid increases
Answer »Answer: (c)
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