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MCQs

Total Questions : 95 | Page 5 of 10 pages
Question 41. A solution has 25% w/w solution of Sodium Chloride in 10 grams of water what is the mole fraction of Sodium Chloride?
  1.    0.05
  2.    0.06
  3.    0.07
  4.    0.08
 Discuss Question
Answer: Option C. -> 0.07
Answer: (c).0.07
Question 42. If the mole fraction of SO₂ in H₂SO₄ is 0.2, what is the ratio of mass of sulfur and oxygen in the solution?
  1.    0.166
  2.    6
  3.    1.8
  4.    0.555
 Discuss Question
Answer: Option D. -> 0.555
Answer: (d).0.555
Question 43. A neutral gas that is made of nitrogen and hydrogen only contains 7 g of nitrogen is in a mixture of with total mass 17 g, what is the mass fraction of the gas?
  1.    0.5
  2.    0.25
  3.    0.45
  4.    0.8
 Discuss Question
Answer: Option A. -> 0.5
Answer: (a).0.5
Question 44. A mixture of gases SO₂, O₂ and 4 g of N₂ and total mass of mixture is 10 g, what is the sum of mole fraction of SO₂ and O₂?
  1.    0.25
  2.    0.5
  3.    0.75
  4.    1
 Discuss Question
Answer: Option C. -> 0.75
Answer: (c).0.75
Question 45. A mixture contains 23 g of ethanol and 36 g of water, some acetic acid is added to the mixture and its mole fraction becomes 0.5, how much acetic acid was added?
  1.    25 g
  2.    75 g
  3.    100 g
  4.    150 g
 Discuss Question
Answer: Option D. -> 150 g
Answer: (d).150 g
Question 46. A mixture contains 9 gram each of H₂O and NaCl, what is the mole fraction of NaCl?
  1.    0.15
  2.    0.23
  3.    0.45
  4.    0.64
 Discuss Question
Answer: Option B. -> 0.23
Answer: (b).0.23
Question 47. A mixture contains 10 grams each of CH₄, H₂O, and SO₂, what is the mole fraction of CH₄?
  1.    0.14
  2.    0.31
  3.    0.46
  4.    0.67
 Discuss Question
Answer: Option C. -> 0.46
Answer: (c).0.46
Question 48. A mixture contains 80% of HCl and 20% H₂O by weight, what is the mole fraction of HCl?
  1.    0.15
  2.    0.29
  3.    0.45
  4.    0.66
 Discuss Question
Answer: Option D. -> 0.66
Answer: (d).0.66
Question 49. A compound contains 40% of Sulphur and 60% of Oxygen, what is the empirical formula of the compound?
  1.    SO₂
  2.    SO₃
  3.    SO₄
  4.    None of the mentioned
 Discuss Question
Answer: Option B. -> SO₃
Answer: (b).SO₃
Question 50. A mixture contains 80% of NaOH and 20% H₂O by weight, what is the mole fraction of NaOH?
  1.    0.24
  2.    0.42
  3.    0.64
  4.    0.78
 Discuss Question
Answer: Option C. -> 0.64
Answer: (c).0.64

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