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MCQs

Total Questions : 1913 | Page 1 of 192 pages
Question 1. In a neutral solution
  1.    H⁺ ions are absent
  2.    OH⁻ ions are absent
  3.    Both H⁺ and OH⁻ ions are present in very small but equal concentration
  4.    None of these
 Discuss Question
Answer: Option C. -> Both H⁺ and OH⁻ ions are present in very small but equal concentration
Question 2. A vessel of volume 1000 m³ contains air which is saturated with water vapour. The total pressure and temperature are 100 kPa and 20°C respectively. Assuming that the vapour pressure of water at 20°C is 2.34 kPa, the amount of water vapour (in kg) in the vessel is approximately
  1.    17
  2.    20
  3.    25
  4.    34
 Discuss Question
Answer: Option A. -> 17
Question 3. In which of the following case of mixing of a strong acid with strong base (each of 1N concentration), temperature increase will be the highest?
  1.    30 c.c acid and 30 c.c base
  2.    20 c.c acid and 25 c.c base
  3.    15 c.c acid and 35 c.c base
  4.    35 c.c acid and 15 c.c base
 Discuss Question
Answer: Option A. -> 30 c.c acid and 30 c.c base
Question 4. In case of an unsaturated vapor-gas mixture, the humid volume increases with increase in the
  1.    Total pressure
  2.    Absolute humidity at a given temperature
  3.    Both A & B
  4.    Neither A nor B
 Discuss Question
Answer: Option C. -> Both A & B
Question 5. Which of the following is not a unit of pressure?
  1.    Parsec
  2.    Kilo-pascal
  3.    Bar
  4.    Newton/metre²
 Discuss Question
Answer: Option A. -> Parsec
Question 6. NaOH contains __________ percent oxygen.
  1.    1
  2.    10
  3.    16
  4.    40
 Discuss Question
Answer: Option D. -> 40
Question 7. Increasing the temperature of an aqueous solution will cause decrease in its
  1.    Molality
  2.    Mole fraction
  3.    Weight percent
  4.    Molarity
 Discuss Question
Answer: Option D. -> Molarity
Question 8. The accumulation in a steady state combustion process, burning 1 kg mole of carbon with 1 kg mole of oxygen thereby producing 1 kg mole of carbon dioxide, is __________ kg mole.
  1.    1
  2.    0
  3.    16
  4.    44
 Discuss Question
Answer: Option B. -> 0
Question 9. The value of gas constant 'R' is __________ kcal/kg.mole.°C.
  1.    2.79
  2.    1.987
  3.    3.99
  4.    None of these
 Discuss Question
Answer: Option D. -> None of these
Question 10. Heat of __________ of a fuel is called its calorific value.
  1.    Formation
  2.    Combustion
  3.    Reaction
  4.    Vaporisation
 Discuss Question
Answer: Option B. -> Combustion

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