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Unit - 3.3 Separation techniques for components of a mixture · ICSE STD 7 (ICSE - English Medium). 5 questions.

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5 questions · timed · auto-graded

Question 11 Mark
Statement are incorrect. write the correct statement:
Fractional distillation is used for separating any two immiscible liquids.
Answer
Fractional distillation is used for separating any two miscible liquids.
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Question 21 Mark
Statement are incorrect. write the correct statement:
The components of a mixture are present in a fixed ratio.
Answer
The components of a mixture are not present in a fixed ratio.
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Question 31 Mark
Statement are incorrect. write the correct statement:
Pure water is obtained from sea water by the combined process of decantation and filtration.
Answer
Pure water is obtained from sea water by the combined process of distillation.
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Question 41 Mark
Statement are incorrect. write the correct statement:
Kerosene oil is separated from the mixture of kerosene oil and water by the process of distillation.
Answer
Kerosene oil is separated from the mixture of kerosene oil and water by the process of fractional distillation.
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Question 51 Mark
Statement are incorrect. write the correct statement:
lodine is removed from the mixture of iodine and sand by the process of evaporation.
Answer
lodine is removed from the mixture of iodine and sand by the process of sublimation.
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Do as Directed. - CHEMISTRY STD 7 Questions - Vidyadip