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 · 7 Apr · Shift 1 · Q21
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 · 7 Apr · Shift 1 · Q21

Some Basic Concepts of Chemistry question

2025 · 7 Apr · Shift 1 · Q21

JEE MainChemistrySome Basic Concepts of ChemistryNumerical+4 / −1
An organic compound weighing 500 mg , produced 220 mg of CO2\mathrm{CO}_2CO2​, on complete combustion. The percentage composition of carbon in the compound is ‾%\underline{\hspace{2cm}}\%​%. (nearest integer) (Given molar mass in gmol−1\mathrm{g} \mathrm{mol}^{-1}gmol−1 of C:12,O:16\mathrm{C}: 12, \mathrm{O}: 16C:12,O:16 )
Numerical answer
PreviousNext

More from Some Basic Concepts of Chemistry

  • 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
  • 20 mL of sodium iodide solution gave 4.74 g silver iodide when treated with excess of silver nitrate solution. The molarity of the sodium iodide solution is ​ M. (Nearest Integer value) (Given : Na = 23, I = 127,…2025 · Numerical
  • On combustion 0.210 g of an organic compound containing C, H and O gave 0.127 g H2​O and 0.307 g CO2​. The percentages of hydrogen and oxygen in the given organic compound respectively are:2025 · MCQ
  • Density of 3 M NaCl solution is 1.25 g/mL. The molality of the solution is :2025 · MCQ
  • 20 mL of 2 M NaOH solution is added to 400 mL of 0.5 M NaOH solution. The final concentration of the solution is ​×10−2M. (Nearest integer)2025 · Numerical
  • 2.8×10−3 mol of CO2​ is left after removing 1021 molecules from its 'x' mg sample. The mass of CO2​ taken initially is Given: NA​=6.02×1023 mol−1…2025 · MCQ
  • During " S " estimation, 160 mg of an organic compound gives 466 mg of barium sulphate. The percentage of Sulphur in the given compound is ​ %. (Given molar mass in g mol−1 of Ba:137, S:32,O:16…2025 · Numerical