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ICSE Class 10 Elements, Compounds and Mixtures — practice questions — page 2

Explore 50 free Elements, Compounds and Mixtures questions in ICSE Class 10 Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Elements, Compounds and Mixtures questions and exercises with answers

Showing questions 31–50 of 50.

Recover dry, heat-stable salt from salt water; water is not needed. Use?Read the answer and worked solution →Obtain liquid water from salt water while retaining the salt. Use?Read the answer and worked solution →In distillation, what is the condenser's main job?Read the answer and worked solution →Distil miscible liquids apart (boiling at 70 C/74 C). Use?Read the answer and worked solution →A fractionating column improves separation mainly by providing?Read the answer and worked solution →Simple distillation of salt water separates by a difference in?Read the answer and worked solution →Which method separates dissolved ink dyes by travel along paper?Read the answer and worked solution →Why can paper chromatography separate dissolved dyes?Read the answer and worked solution →Fine suspended particles settle slowly. Which method speeds density separation?Read the answer and worked solution →Match each chemical classification with its defining characteristic:Read the answer and worked solution →Match each element category with a characteristic example:Read the answer and worked solution →Match each noble gas with its common technological application:Read the answer and worked solution →Match each mixture type with its correct real-world example:Read the answer and worked solution →Match each separation technique with its operating principle:Read the answer and worked solution →Match each specific mixture with its best separation method:Read the answer and worked solution →Match each laboratory separation apparatus with its purpose:Read the answer and worked solution →Match each chromatography concept with its role in mixture analysis:Read the answer and worked solution →Match acid names to their formulasRead the answer and worked solution →Match indicators to their acid colourRead the answer and worked solution →Sort the acidic salts from the basicRead the answer and worked solution →

Worked practice questions

Recover dry, heat-stable salt from salt water; water is not needed. Use?

  1. A separating funnel
  2. Sieving of the solution
  3. Evaporation of the water
  4. Ordinary filtration
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Correct answer: C. Evaporation of the water

Evaporating water leaves the nonvolatile, heat-stable dissolved salt behind.

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Obtain liquid water from salt water while retaining the salt. Use?

  1. Sieving through fine mesh
  2. Distillation with condensation
  3. Decantation after standing
  4. Filtration into a clean beaker
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Correct answer: B. Distillation with condensation

Distillation vaporises water and then condenses it into a receiver, separating it from the nonvolatile salt.

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In distillation, what is the condenser's main job?

  1. Retain insoluble solid particles
  2. Heat liquid until it vaporises
  3. Cool vapour into collected liquid
  4. Mix the separated liquid layers
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Correct answer: C. Cool vapour into collected liquid

The condenser removes heat from vapour so that it turns back into collectable liquid.

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More Chemistry topics

Organic ChemistryPeriodic Table & Periodic PropertiesMetallurgyMole Concept and StoichiometryAnalytical ChemistryElectrolysisAcids, Bases and SaltsStudy of Compounds: hydrogen chloride, ammonia, nitric acid, sulphuric acid