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Stoichiometry Questions

Practice 34 Stoichiometry questions with detailed answers and explanations. Free MCQs, PYQs, and mock test questions for NEET, JEE, GATE, SSC and more.

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34
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5
Easy
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24
Medium
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5
Hard
Practice by Exam:Chemistry(34)

About Stoichiometry — practice questions, PYQs & concepts

Stoichiometry is a frequently-tested topic on Chemistry. ExamTest.live currently lists 34 Stoichiometry questions spanning previous-year papers from 2026 to 2026, each with worked solutions and a step-by-step explanation. Use the filters on this page to focus on a specific exam, difficulty level or year — every answer key is free, no sign-up required.

Stoichiometry weight in competitive exams

Across our Stoichiometry question bank, the largest sources are Chemistry (34). Click any exam chip above to drill down to that exam-specific question set.

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All Stoichiometry Questions(1–34 of 34)

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Q1mediummcqChemistryGeneral Knowledge2026
0% accuracy
Formula of the Chloride of an element is and its Molecular weight is (). The molecular weight of its oxide is
Q2mediummcqChemistryIndian Competitive Exam Prep2026
0% accuracy
If of gas has ' ' number of molecules, how many molecules are present in of gas?
Q3mediummcqChemistryNEET (UG) 20172026
0% accuracy
The correct order of the stoichiometries of formed when in excess is treated with the complexes: respectively is:
Q4easymcqChemistryNEET 20192026
0% accuracy
The number of moles of hydrogen molecules required to produce 20 moles of ammonia through Haber's process is:
Q5mediummcqChemistryAIEEE 20072026
0% accuracy
In the reaction , which statement is correct?
Q6hardmcqChemistryNEET (UG) 20182026
A mixture of formic acid and oxalic acid is treated with conc. . The evolved gaseous mixture is passed through pellets. Weight (in g) of the remaining product at STP will be:
Q7mediummcqChemistryNEET (UG) 20182026
For the redox reaction: The correct coefficients of the reactants for the balanced equation are:
Q8mediummcqChemistryNEET 20212026
An organic compound contains (by wt.) carbon and remaining percentage of hydrogen. The right option for the empirical formula of this compound is: [Atomic wt. Of is , is ]
Q9hardmcqChemistryNEET 20222026
What mass of pure will be required to neutralise of solution according to the following reaction?
Q10easymcqChemistryNEET 20232026
Weight (g) of two moles of the organic compound, which is obtained by heating sodium ethanoate with sodium hydroxide in presence of calcium oxide is:
Q11mediummcqChemistryNEET 20232026
The mass of produced by heating of pure limestone is:(Atomic mass of )
Q12mediummcqChemistryNEET (UG) 20242026
of sodium hydroxide was treated with of solution. The mass of sodium hydroxide left unreacted is equal to:
Q13mediummcqChemistryNEET (UG) 20242026
A compound X contains of A, of B, and the remaining percentage of C. The empirical formula of X is:(Given atomic masses: A = , B = , C = )
Q14easymcqChemistryAIEEE 20042026
molecules of urea are present in of its solution. The concentration of the urea solution is:
Q15easymcqChemistryAIEEE 20042026
To neutralize completely of aqueous solution of phosphorous acid (), the volume of aqueous solution required is:
Q16mediummcqChemistryJEE Main2026
Experimentally it was found that a metal oxide has formula . Metal is present as and in its oxide. Fraction of the metal which exists as would be:
Q17mediummcqChemistryJEE Main2026
A gaseous hydrocarbon gives upon combustion of water and of . The empirical formula of the hydrocarbon is:
Q18mediummcqChemistryGeneral Awareness2026
Atomic mass of Oxygen is 16 and atomic number is 8. What is the mass in grams of 2 moles of oxygen gas?
Q19mediummcqChemistryNEET 20172026
The correct order of the stoichiometries of formed when in excess is treated with the complexes: respectively is:
Q20mediummcqChemistryChemistry
2% accuracy
Among the following, choose the ones with equal number of atoms:A. of () [molar mass = ]B. of () [molar mass = ]C. of () [molar mass = ]D. of () [molar mass = ]E. of () [molar mass = ]Choose the correct answer from the options given below:
Q21mediummcqChemistryChemistry
0% accuracy
The number of moles of that will be needed to react with one mole of sulphite ion in acidic solution is:
Q22hardmcqChemistryChemistry
Suppose the elements and combine to form two compounds and . When of weighs and of weighs , the atomic weights of and are:
Q23hardmcqChemistryChemistry
What is the mass of the precipitate formed when of solution of is mixed with of solution?
Q24hardmcqChemistryChemistry
of a magnesium carbonate sample decomposes on heating to give carbon dioxide and magnesium oxide. What will be the percentage purity of magnesium carbonate in the sample? (Atomic weight: , , )
Q25mediummcqChemistryChemistry
When of is mixed with of , each at S.T.P., the moles of formed is equal to:
Q26mediummcqChemistryChemistry
How many grams of concentrated nitric acid solution (70% by mass) should be used to prepare of ?
Q27easymcqChemistryChemistry
The number of atoms in of a triatomic gas is ():
Q28mediummcqChemistryChemistry
of sodium carbonate, is dissolved in enough water to make of solution. If sodium carbonate dissociates completely, molar concentration of sodium ion, and carbonate ions, are respectively: (Molar mass of )
Q29mediummcqChemistryChemistry
What is the in the final solution prepared by mixing of with of ?
Q30mediummcqChemistryChemistry
of hydrogen and of oxygen were filled in a steel vessel and exploded. Amount of water produced in this reaction will be:
Q31mediummcqChemistryChemistry
Number of moles of required to oxidize one mole of ferrous oxalate completely in acidic medium will be:
Q32mediummcqChemistryChemistry
How many moles of lead (II) chloride will be formed from a reaction between of and of ?
Q33mediummcqChemistryChemistry
What volume of oxygen gas () measured at and , is needed to burn completely of propane gas () measured under the same conditions?
Q34mediummcqChemistryChemistry
In the balanced chemical reaction and respectively corresponds to:

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