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Saturday, 31 October

JEE Main 2021 · ChemistryNumerical answerNumerical valueEasyCalculation

JEE Main 24 February 2021, Shift 2, Chemistry Q52

Question 52 of 90 in this shift, Chemistry question 22 of 30, Section B.

The volume occupied by 4.75 g of acetylene gas at 50∘50^\circC and 740 mmHg pressure is __________ L. (Rounded off to the nearest integer) [Given R =0.0826= 0.0826 L atm K−1 mol−1\mathrm{K^{-1}\,mol^{-1}}]

Official answer

5

NTA final key.

Same idea in other shifts

Asked 10× in all
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  3. 24 Jun 2022, Shift 2 · Q81At 300 K, a sample of 3.0 g of gas A occupies the same volume as 0.2 g of hydrogen at 200 K at the same pressure. The molar mass of gas A…MediumNumerical value
  4. 26 Jun 2022, Shift 1 · Q62An evacuated glass vessel weighs 40.0 g when empty, 135.0 g when filled with a liquid of density 0.95 g mL−1^{-1} and 40.5 g when filled…MediumSingle correct
  5. 26 Jun 2022, Shift 1 · Q852.0 g of H2\mathrm{H_2} gas is adsorbed on 2.5 g of platinum powder at 300 K and 1 bar pressure. The volume of the gas adsorbed per gram…MediumNumerical value
  6. 27 Jun 2022, Shift 1 · Q50A mixture of hydrogen and oxygen has volume 2000 cm32000\ \mathrm{cm^3}, temperature 300 K, pressure 100 kPa and mass 0.76 g. The ratio of…MediumSingle correct
  7. 29 Jun 2022, Shift 2 · Q81A box contains 0.90 g of liquid water in equilibrium with water vapour at 27°C. The equilibrium vapour pressure of water at 27°C is 32.0…MediumNumerical value
  8. 31 Aug 2021, Shift 2 · Q7A mixture of hydrogen and oxygen has volume 500500 cm3^3, temperature 300300 K, pressure 400400 kPa and mass 0.760.76 g. The ratio of masses…MediumSingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.