The heats of vaporisation of CS₂, C₂H₅OH &H₂O are 26.8, 38.6 & 40.6 KJ/kg mole respectively. The order of decreasing inter-molecular forces in these liquids is September 7, 2025 by Admin H₂O > C₂H₅OH > CS₂ CS₂ > C₂H₅OH > H₂O H₂O > CS₂ > C₂H₅OH CS₂ > H₂O > C₂H₅OH ✅ The correct answer is option A.
Osmotic pressure exerted by a solution prepared by dissolving one gram mole of a solute in 22.4 litres of a solvent at 0°C will be __________ atmosphere. September 7, 2025 by Admin 0.5 1 1.5 2 ✅ The correct answer is option B.
One micron is equal to __________ cm. September 7, 2025 by Admin 10-Feb 10-Apr 10-Jun 10-Aug ✅ The correct answer is option B.
With rise in temperature, the solubility of ammonia in water at a fixed pressure September 7, 2025 by Admin Increases Decreases Remains unchanged Increases exponentially ✅ The correct answer is option B.
Average molecular weight of air is about September 7, 2025 by Admin 21 29 23 79 ✅ The correct answer is option B.
1 kg of calcium carbide (CaC₂) produces about 0.41 kg of acetylene gas on treatment with water. How many hours of service can be derived from 1 kg of calcium carbide in an acetylene lamp burning 35 litres of gas at NTP per hour? September 7, 2025 by Admin 5 10 15 20 ✅ The correct answer is option B.
Which of the following is not a colligative property? September 7, 2025 by Admin Osmotic pressure Depression of freezing point Lowering of vapor pressure None of these ✅ The correct answer is option D.
One of the specific gravity scales is “Brix” (used speicifically for sugar solution). It is defined as September 7, 2025 by Admin Brix = (400/G) – 400 Brix = 200 (G-1) Brix = 145 – (145/G) None of these ✅ The correct answer is option A.
N.T.P. corresponds to September 7, 2025 by Admin 1 atm.absolute pressure& 0°C 760 mm Hg gauge pressure & 0°C 760 torr & 15°C 101.325 KPa gauge pressure & 0°C ✅ The correct answer is option A.
The quantity of heat required to evaporate 1 kg of a saturated liquid is called September 7, 2025 by Admin Specific heat 1 Kcal Sensible heat Latent heat ✅ The correct answer is option D.