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) Calcium carbonate
(b) Calcium chloride
(c) Calcium oxide
(d) Calcium
The correct answers to the above question in:
Answer: (a)
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Question : 1
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 : 2
Which one is a sublime substance?
a) Iodine
b) Table salt
c) Sugar
d) Potassium Iodide
Answer »Answer: (a)
Question : 3
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 : 4
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.
Question : 5
Which one of the following is not a mixture?
a) Milk
b) Air
c) Mercury
d) Cement
Answer »Answer: (c)
Question : 6
Which one of the following is not a mixture?
a) Baking soda
b) Tootpaste
c) Toilet soap
d) Vinegar
Answer »Answer: (a)
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