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JEE Main 4 August 2021, Shift 2, Chemistry Q57

Question 57 of 90 in this shift, Chemistry question 27 of 30, Section B.

x \times 10^{-5}

g of

\mathrm{Ca(OH)_2}

are required to produce 200

\mathrm{cm^3}

of an aqueous solution of pH 10.0. The value of

x

is ________ . (Nearest integer) [Given : Atomic masses : Ca : 40.0 u; H : 1.0 u; O : 16.0 u]

Official answer

NTA final key.

Chapter: Equilibrium
Topic: pH and Buffers
Idea tested: pH of Strong Acids and Bases

Same idea in other shifts

Asked 7× in all

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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.