Chemistry · 2023
JEE Main · 29 January 2023, Shift 2 · Q43
When a hydrocarbon A undergoes combustion in the presence of air, it requirs 9.5 equivalents of oxygen and produces 3 equivalents of water. What is…
When a hydrocarbon $\displaystyle A$ undergoes combustion in the presence of air, it requirs $\displaystyle 9.5$ equivalents of oxygen and produces $\displaystyle 3$ equivalents of water. What is the molecular formula of A ?
Official answer
From NTA’s final answer key for this paper.
(4)
$\displaystyle \mathrm{C}_8 \mathrm{H}_6$
More from Some Basic Concepts of Chemistry
- 2.8 × 10^-3 mol of CO_2 is left after removing 10^21 molecules from its ' x ' mg sample. The mass of CO_2 taken initially is Given: N_A=6.02 × 10^23…2025
- The number of molecules and moles in 2.8375 litres of O_2 at STP are respectively2023
- For the given reaction; CaCO_3+2 HCl → CaCl_2+H_2 O+CO_2 If 90 g CaCO_3 is added to 300 mL of HCl which contains 38.55 % HCl by mass and has density…2026
- 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…2025
- In the Claisen-Schmidt reaction to prepare 351 g of dibenzalacetone using 87 g of acetone, the amount of benzaldehyde required is ____ g. (Nearest…2024
- Number of hydrogen atoms per molecule of a hydrocarbon A having 85.8 % carbon is ____ (Given: Molar mass of A=84 g mol^-1 )2023
- From 6.55 g of aniline, the maximum amount of acetanilide that can be prepared will be ____ × 10^-1 g.2024
- x mg of pure HCl was used to make an aqueous solution. 25.0 mL of 0.1 M Ba(OH)_2 solution is used when the HCl solution was titrated against it. The…2026
JEE Main 2023 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.