JEE Main 2020 · ChemistryNumerical answerNumerical valueMediumCalculation

JEE Main 4 September 2020, Shift 2, Chemistry Q46

Question 46 of 75 in this shift, Chemistry question 21 of 25.

A 100 mL solution was made by adding 1.43 g of

\mathrm{Na_2CO_3 \cdot}x\mathrm{H_2O}

. The normality of the solution is 0.1 N. The value of

x

is __________. (The atomic mass of Na is 23 g/mol)

Official answer

10.00

NTA final key (Sep 2020).

Chapter: Some Basic Concepts of Chemistry
Topic: Mole Concept
Idea tested: Water of Crystallization Determination

Same topic in other shifts

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5 Apr 2026, Shift 1 · Q54What is the mole fraction of water in 10% by weight (w/w) of aqueous urea solution? [Given: Molar mass of H, O, C and N are 1, 16, 12 and…EasySingle correct
6 Apr 2026, Shift 1 · Q51An oxide of iron contains 69.9% iron, its empirical formula, is: (Given : Molar mass of Fe and O are 56 and 16 g mol $^{-1}$ respectively.)EasySingle correct
6 Apr 2026, Shift 2 · Q51Which of the following contain the same number of atoms ? (Given : Molar mass in g mol $^{-1}$ of H, He, O and S are 1, 4, 16 and 32…EasyOther

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.