JEE Main 2022 · ChemistryNumerical answerNumerical valueEasyCalculation

JEE Main 25 June 2022, Shift 1, Chemistry Q90

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

Number of grams of bromine that will completely react with 5.0 g of pent-1-ene is __________

\times 10^{-2}

g. (Atomic mass of Br = 80 g/mol) [Nearest integer]

Official answer

1143

NTA final key.

Chapter: Hydrocarbons
Topic: Mole Concept
Idea tested: Mole and Avogadro Calculations

Same idea in other shifts

Asked 11× in all

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8 Apr 2026, Shift 2 · Q51Match List - I with List - II. List - I (Mass of substance) | List - II (Number of atoms) A. 1.8 mg water | I.…EasyMatch the list
3 Apr 2025, Shift 1 · Q51Among $10^{-9}$ g (each) of the following elements, which one will have the highest number of atoms? Element: Pb, Po, Pr and PtEasySingle correct
10 Apr 2023, Shift 1 · Q61The number of molecules and moles in 2.8375 litres of $\mathrm{O_2}$ at STP are respectivelyEasySingle correct
10 Apr 2023, Shift 2 · Q61Match List I with List II LIST I A. 16 g of $\mathrm{CH_4}$ (g) B. 1 g of $\mathrm{H_2}$ (g) C. 1 mole of $\mathrm{N_2}$ (g) D. 0.5 mol of…EasyMatch the list
26 Jul 2022, Shift 2 · Q61Hemoglobin contains 0.34% of iron by mass. The number of Fe atoms in 3.3 g of hemoglobin is (Given: Atomic mass of Fe is 56 u,…EasySingle correct
25 Jun 2022, Shift 1 · Q81The number of N atoms in 681 g of $\mathrm{C_7H_5N_3O_6}$ is $x \times 10^{21}$ . The value of $x$ is __________. (…EasyNumerical value

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.