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MCQs

Total Questions : 95 | Page 1 of 10 pages
Question 1. What is the molecular weight of a mixture that contains 25% CO₂, 40% O₂ and 35% N₂?
  1.    11.2 g
  2.    22.4 g
  3.    33.6 g
  4.    44.8 g
 Discuss Question
Answer: Option C. -> 33.6 g
Answer: (c).33.6 g
Question 2. What is the weight of 10 moles of a mixture with composition 15% O₂, 25% SO₂, 30% COCl₂ , 25% SO₃ and 5% N₂?
  1.    124
  2.    345
  3.    507
  4.    719
 Discuss Question
Answer: Option D. -> 719
Answer: (d).719
Question 3. If a compound contains 48% of Carbon, 48% of oxygen and 8% of hydrogen by weight, then what is the possible molecular formula of the compound?
  1.    C₂H₄O
  2.    CH₄O₃
  3.    C₄H₄O₃
  4.    C₄H₈O₃
 Discuss Question
Answer: Option D. -> C₄H₈O₃
Answer: (d).C₄H₈O₃
Question 4. What is the value of x in C₂H₈(OH)x if the percentage by weight of hydrogen is 12%?
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option D. -> 4
Answer: (d).4
Question 5. A compound contain 12% of carbon, 16% of oxygen, 28% of nitrogen, 4% of hydrogen and 40% calcium by weight, then what can be the possible formula of the compound?
  1.    C₂H₃N₂Ca(OH)
  2.    CH₄N₄Ca₂(OH)
  3.    CH₃N₂Ca₂(OH)
  4.    None of the mentioned
 Discuss Question
Answer: Option C. -> CH₃N₂Ca₂(OH)
Answer: (c).CH₃N₂Ca₂(OH)
Question 6. How much Sodium is there in a solution with 10 Kg of solvent (Density = 5 Kg/m³) and concentration 4 molar?
  1.    23 grams
  2.    92 grams
  3.    184 grams
  4.    276 grams
 Discuss Question
Answer: Option C. -> 184 grams
Answer: (c).184 grams
Question 7. What is the molarity of the mixture of two solution, first solution 4 M and 10 liter and second solution 2 M and 40 liter?
  1.    1.2 M
  2.    2.4 M
  3.    4.8 M
  4.    9.2 M
 Discuss Question
Answer: Option B. -> 2.4 M
Answer: (b).2.4 M
Question 8. A 5 molar solution is 27.75% CaCl₂ by mass, what is the density of the solution?
  1.    1 g/cm³
  2.    2 g/cm³
  3.    3 g/cm³
  4.    4 g/cm³
 Discuss Question
Answer: Option B. -> 2 g/cm³
Answer: (b).2 g/cm³
Question 9. A solution with density 1 g/cm³ has 98 grams of H₂SO₄ in 402 grams of water, what is the concentration of solution?
  1.    1 molar
  2.    2 molar
  3.    3 molar
  4.    4 molar
 Discuss Question
Answer: Option B. -> 2 molar
Answer: (b).2 molar
Question 10. A solution with density 2 g/cm³, concentration 1 molar and weight 500 grams, then what is the mass of HNO₃ in the solution?
  1.    63 grams
  2.    126 grams
  3.    189 grams
  4.    252 grams
 Discuss Question
Answer: Option D. -> 252 grams
Answer: (d).252 grams

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