Methods of SeparationPractice Questions & MCQs
Practice Methods of Separation questions from Is Matter Around Us Pure (Class 9 Science) - important MCQs with answers and step-by-step solutions. Solve the sample questions below, then practice the full set free on the RankByte app.
Methods of SeparationQuiz - Solve & Score
Q1. Why is crystallisation often preferred over evaporation to purify a solid?
- A.some solids decompose on strong heating, which crystallisation avoids
- B.evaporation is impossible for solids
- C.crystallisation needs no solvent
- D.evaporation always adds impurities
Answer: A. some solids decompose on strong heating, which crystallisation avoids
Q2. Why must a mixture of salt and water NOT be separated by filtration?
- A.the salt is dissolved and passes through the filter paper
- B.salt is magnetic and sticks to the funnel
- C.water cannot pass through filter paper
- D.the salt reacts with the paper
Answer: A. the salt is dissolved and passes through the filter paper
Q3. Which separation relies on a difference in particle SIZE (insoluble solids vs liquid)?
- A.filtration
- B.distillation
- C.chromatography
- D.a separating funnel
Answer: A. filtration
The core fact here is - An ion forms when an atom gains or loses electrons; charge = (protons) - (electrons), so the sign and magnitude follow directly => substituting the given counts gives the stated species; therefore the answer = filtration. That fits the listed correct option directly - Correct. As for the rest: option B) 'distillation' is incorrect: Distillation relies on boiling-point differences, not particle size; option C) 'chromatography' misses the point - Chromatography relies on differing movement rates, not simple size sieving. Hence the answer is A) filtration.
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Yes. These Methods of Separation important questions follow the Science exam pattern (CBSE Boards, plus JEE and NEET foundation), so they help with both school and competitive prep.
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