Doubts
Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents
Sign in to save progress →
Doubts
Sign in

Some Basic Concepts of Chemistry question

2025 · 3 Apr · Shift 2 · Q20
Guest · try one question or challengeGuest · try one question or challenge
  1. PYQ Library
  2. /JEE Main
  3. /Chemistry
  4. /Some Basic Concepts of Chemistry
  5. /2025 · 3 Apr · Shift 2 · Q20

Some Basic Concepts of Chemistry question

2025 · 3 Apr · Shift 2 · Q20

JEE MainChemistrySome Basic Concepts of ChemistryMCQ+4 / −1
In Dumas' method for estimation of nitrogen 0.4 g of an organic compound gave 60 mL of nitrogen collected at 300 K temperature and 715 mm Hg pressure. The percentage composition of nitrogen in the compound is (Given : Aqueous tension at 300 K=15 mmHg300 \mathrm{~K}=15 \mathrm{~mm} \mathrm{Hg}300 K=15 mmHg )
  1. A
    15.71%15.71 \%15.71%
  2. B
    17.46%17.46 \%17.46%
  3. C
    7.85%7.85 \%7.85%
  4. D
    20.95%20.95 \%20.95%
PreviousNext

More from Some Basic Concepts of Chemistry

  • X g of nitrobenzene on nitration gave 4.2 g of m -dinitrobenzene. X = ​ g. (nearest integer) [Given : molar mass (in gmol−1)C:12,H:1,O:16, N:14]…2025 · Numerical
  • Mass of magnesium required to produce 220 mL of hydrogen gas at STP on reaction with excess of dil. HCl is Given: Molar mass of Mg is 24 g mol−1.2025 · MCQ
  • 10 mL of 2 M NaOH solution is added to 20 mL of 1 M HCl solution kept in a beaker. Now, 10 mL of this mixture is poured into a volumetric flask of 100 mL containing 2 moles of HCl and made the volume upto the mark with distilled water. The…2025 · MCQ
  • Fortification of food with iron is done using FeSO4​⋅7H2​O. The mass in grams of the FeSO4​. 7H2​O required to achieve 12 ppm of iron in 150 kg of wheat is ​…2025 · Numerical
  • The amount of calcium oxide produced on heating 150 kg limestone ( 75% pure) is ​ kg. (Nearest integer) Given: Molar mass (in gmol−1 ) of Ca-40, O-16, C-122025 · Numerical
  • An organic compound weighing 500 mg , produced 220 mg of CO2​, on complete combustion. The percentage composition of carbon in the compound is ​%. (nearest integer) (Given molar mass in gmol−1…2025 · Numerical
  • Thyroxine, the hormone has given below structure The percentage of iodine in thyroxine is ​ %. (nearest integer) (Given molar mass in gmol−1C:12,H:1,O:16, N:14,I:127… Includes diagram2025 · Numerical
  • Butane reacts with oxygen to produce carbon dioxide and water following the equation given below. C4​H10​( g)+213​O2​( g)→4CO2​( g)+5H2​O(l)…2025 · Numerical