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) Iodine
(b) Table salt
(c) Sugar
(d) Potassium Iodide
The correct answers to the above question in:
Answer: (a)
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Read more nature of matter and composition Based General Science Questions and Answers
Question : 1
Which one of the following will result in the formation of a mixture?
a) Adding sodium metal to water
b) Breaking of ice cubes into small pieces
c) Crushing of a marble tile into small particles
d) Adding milk in water
Answer »Answer: (d)
Question : 2
The main constituent of vinegar is
a) Citric acid
b) Acetic acid
c) Ascorbic acid
d) Tartaric acid
Answer »Answer: (b)
Question : 3
What happens when a fixed amount of oxygen gas is taken in a cylinder and compressed at constant temperature?
- Number of collisions of oxygen molecules at per unit area of the wall of the cylinder increase.
- Oxygen ($O_2$) gets converted into ozone ($O_3$).
- Kinetic energy of the molecules of oxygen gas increases.
a) C only
b) A and C
c) B and C
d) A only
Answer »Answer: (d)
Question : 4
Distillation is a good separation technique for
a) solid alloys
b) liquids
c) solids
d) gases
Answer »Answer: (b)
Distillation is a separation technique used for separation of miscible liquids having different boiling point.
Question : 5
The chemical name of lime stone is
a) Calcium carbonate
b) Calcium chloride
c) Calcium oxide
d) Calcium
Answer »Answer: (a)
Question : 6
A mixture of common salt, sulphur, sand and iron filings is shaken with carbon disulphide and filtered through a filter paper. The filtrate is evaporated to dryness in a china dish. What will be left in the dish after evaporation?
a) Iron filings
b) Sulphur
c) Sand
d) Common salt
Answer »Answer: (b)
Sulphur will left behind. As in given mixture only sulphur gets dissolved in carbon disulphide.
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