JEE Main 2023 · ChemistryMultiple choiceSingle correctEasyRecall

JEE Main 8 April 2023, Shift 2, Chemistry Q65

Question 65 of 90 in this shift, Chemistry question 5 of 30, Section A.

In Hall - Heroult process, the following is used for reducing

\mathrm{Al_2O_3}

(1) $\mathrm{Na_3AlF_6}$
(2)GraphiteOfficial answer
(3)Magnesium
(4) $\mathrm{CaF_2}$

Official answer

Option 2

NTA final key.

Chapter: General Principles and Processes of Isolation of Elements
Topic: Metallurgical Extraction
Idea tested: Hall-Heroult Process

Same idea in other shifts

Asked 3× in all

3 Aug 2021, Shift 2 · Q34Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A : Fluoride based compound…EasyAssertion–reason
18 Mar 2021, Shift 1 · Q35The chemical that is added to reduce the melting point of the reaction mixture during the extraction of aluminium is :EasySingle correct

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 42 of the 174 JEE Main shifts held from 2017 to 2026.