Free Test Stoichiometry – NEET

Q1: What does stoichiometry study?

A. Quantitative relationships in chemical reactions B. Qualitative properties of compounds C. Physical states of substances D. Color changes in reactions

Q2: In the reaction 2H2 + O2 → 2H2O, how many moles of water are produced from 2 moles of O2?

A. 4 moles B. 2 moles C. 1 mole D. 3 moles

Q3: What is the mole ratio of H2 to O2 in the reaction 2H2 + O2 → 2H2O?

A. 2:1 B. 1:2 C. 1:1 D. 2:2

Q4: If 5 moles of A react with 10 moles of B in a 1:1 reaction, which is the limiting reagent?

A. A B. B C. Neither D. Both

Q5: In a reaction, the reactant that gets completely consumed is called?

A. Limiting reagent B. Excess reagent C. Product D. Catalyst

Q6: Theoretical yield is:

A. Maximum amount of product possible B. Actual amount of product C. Amount of reactant left D. Amount of catalyst used

Q7: Percent yield is calculated by:

A. (Actual yield/Theoretical yield) × 100 B. (Theoretical yield/Actual yield) × 100 C. Actual yield × Theoretical yield D. None

Q8: If 22 g of CO2 is produced, how many moles is this?

A. 0.5 moles B. 1 mole C. 2 moles D. 0.25 moles

Q9: In the reaction N2 + 3H2 → 2NH3, what is the mole ratio of H2 to NH3?

A. 3:2 B. 1:3 C. 1:2 D. 2:3

Q10: What does the term "excess reagent" mean?

A. Reactant left unreacted after reaction B. Reactant fully consumed C. Product formed D. Catalyst

Q11: In a chemical reaction, if the actual yield is less than the theoretical yield, it is due to?

A. Incomplete reaction or side reactions B. Perfect reaction C. No limiting reagent D. Excess catalyst

Q12: What is the molar mass of H2SO4?

A. 98 g/mol B. 64 g/mol C. 18 g/mol D. 34 g/mol

Q13: What is the number of molecules in 2 moles of a substance?

A. 1.2044 × 10^24 B. 6.022 × 10^23 C. 3.011 × 10^23 D. 2 × 6 molecules

Q14: In the reaction 4Fe + 3O2 → 2Fe2O3, how many moles of Fe are needed to react with 3 moles of O2?

A. 4 moles B. 3 moles C. 6 moles D. 9 moles

Q15: What is the mass of 1 mole of NaCl?

A. 58.5 g B. 23 g C. 35.5 g D. 18 g

Q16: If 0.5 moles of CO2 is formed, how many grams is this?

A. 22 g B. 11 g C. 44 g D. 33 g

Q17: What is the theoretical yield of product if 4 moles of reactant produces 2 moles of product?

A. 2 moles B. 4 moles C. 6 moles D. 8 moles

Quiz for Stoichiometry