/

Learn

Friday, 9 October

/

JEE Main 2021 · ChemistryMultiple choiceSingle correctEasyRecall

JEE Main 25 July 2021, Shift 1, Chemistry Q34

Question 34 of 90 in this shift, Chemistry question 4 of 30, Section A.

In the leaching of alumina from bauxite, the ore expected to leach out in the process by reacting with NaOH is :

(1) $\mathrm{SiO_2}$ Official answer
(2) $\mathrm{TiO_2}$
(3) $\mathrm{Fe_2O_3}$
(4)ZnO

Official answer

Option 1

NTA final key.

Chapter: General Principles and Processes of Isolation of Elements
Topic: Metallurgical Extraction
Idea tested: Bayer Process Chemistry

Same idea in other shifts

Asked 2× in all

28 Jul 2022, Shift 1 · Q66Which of the reaction is suitable for concentrating ore by leaching process ?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.