JEE Main 2021 · ChemistryMultiple choiceSingle correctEasyRecall

JEE Main 18 March 2021, Shift 1, Chemistry Q35

Question 35 of 90 in this shift, Chemistry question 5 of 30, Section A.

The chemical that is added to reduce the melting point of the reaction mixture during the extraction of aluminium is :

(1)Bauxite
(2)Kaolite
(3)Calamine
(4)CryoliteOfficial answer

Official answer

Option 4

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 5× in all

8 Apr 2023, Shift 2 · Q65In Hall - Heroult process, the following is used for reducing $\mathrm{Al_2O_3}$ :-EasySingle correct
24 Jun 2022, Shift 2 · Q67Which of the following chemical reactions represents Hall-Heroult Process?EasySingle correct
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
31 Aug 2021, Shift 1 · Q36Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Aluminium is…EasyAssertion–reason

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.