Start learning →

ICSE Class 10 Mole Concept and Stoichiometry — practice questions — page 3

Explore 68 free Mole Concept and Stoichiometry questions in ICSE Class 10 Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

Practise Mole Concept and Stoichiometry with Quill →

Mole Concept and Stoichiometry questions and exercises with answers

Showing questions 61–68 of 68.

For a pure sample, what quantity is found by dividing mass by molar mass?Read the answer and worked solution →Why are molar masses of natural elements often not whole numbers?Read the answer and worked solution →Under ideal-gas conditions, what can be said about gas volume ratios in a reaction?Read the answer and worked solution →Which ratio leaves no reactant in excess after completion?Read the answer and worked solution →Match each stoichiometric gas relationship at STP (0°C, 1 atm):Read the answer and worked solution →Match each molecular calculation formula with its expression:Read the answer and worked solution →Match each quantity with its number of moles:Read the answer and worked solution →Match each empirical formula problem with the calculated empirical formula:Read the answer and worked solution →

Worked practice questions

For a pure sample, what quantity is found by dividing mass by molar mass?

  1. Amount in moles
  2. Direct atom count
  3. Molar volume
  4. Atomic number
Show answer and solution

Correct answer: A. Amount in moles

Mass divided by molar mass gives the amount of substance.

Open this question →

Why are molar masses of natural elements often not whole numbers?

  1. Atoms contain changing proton counts
  2. Elements have variable atomic numbers
  3. Natural isotopes have different masses
  4. Moles contain different particle counts
Show answer and solution

Correct answer: C. Natural isotopes have different masses

Natural elements contain isotopes with differing masses, so their average is not always an integer.

Open this question →

Under ideal-gas conditions, what can be said about gas volume ratios in a reaction?

  1. They always equal mass ratios
  2. They are always one-to-one
  3. They depend only on gas color
  4. They match mole ratios
Show answer and solution

Correct answer: D. They match mole ratios

For ideal gases at known conditions, volume ratios follow the reaction’s mole ratios.

Open this question →

How to practise

  1. Choose a Mole Concept and Stoichiometry question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
  3. Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.

Put it into practice

Continue with Mole Concept and Stoichiometry practice for ICSE Class 10. Read explanations as you go. No signup form needed to start.

Practise Mole Concept and Stoichiometry →

More Chemistry topics

Organic ChemistryPeriodic Table & Periodic PropertiesMetallurgyAnalytical ChemistryElectrolysisAcids, Bases and SaltsStudy of Compounds: hydrogen chloride, ammonia, nitric acid, sulphuric acidChemical Bonding