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Mole Concept & Stoichiometry
JEE Chemistry • 10 questions • Free on ExamBattle
Practice Questions
Q1
The number of molecules in 44 g of CO₂ (molar mass = 44 g/mol) is:
- A. 6.022×10²³
- B. 3.011×10²³
- C. 1.204×10²⁴
- D. 6.022×10²²
Q2
An oxide of nitrogen contains 30.4% by mass of nitrogen. Its empirical formula is (N = 14, O = 16):
- A. NO
- B. NO₂
- C. N₂O
- D. N₂O₃
Q3
How many moles of O₂ are required to completely burn 2 moles of CH₄? (CH₄ + 2O₂ → CO₂ + 2H₂O)
- A. 1 mol
- B. 2 mol
- C. 4 mol
- D. 8 mol
Q4
The mass of 3.011×10²³ molecules of glucose (C₆H₁₂O₆, M = 180 g/mol) is:
- A. 45 g
- B. 90 g
- C. 180 g
- D. 60 g
Q5
In the reaction 2H₂ + O₂ → 2H₂O, if 4 g of H₂ and 32 g of O₂ are taken, which is the limiting reagent?
- A. H₂
- B. O₂
- C. Both consumed equally
- D. H₂O
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