Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reaso — JEE Mains Chemistry Past Papers Chemistry Question
Question
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Aluminium is extracted from bauxite by the electrolysis of molten mixture of Al2O3 with cryolite. Reason (R) : The oxidation state of Al in cryolite is +3 In the light of the above statements, choose the most appropriate answer from the options given below (A) (A) is false but (R) is true. (B) (A) is true but (R) is false. (C) Both (A) and (R) are correct and (R) is the correct explanation of (A). (D) Both (A) and (R) are correct and (R) is not the correct explanation of (A). uhps nks dFku fn, gSaA ,d dks uke vfHkdFku (A) rFkk nwljs dks dkj.k (R) fn;k gSA vfHkdFku (A) : ckDlkWbV ls ,yqehfu;e dk fu"d"kZ.k Al2O3 rFkk Økb;ksykbV ds xfyr feJ.k ds oS|qr vi?kVu ls djrs gSA dkj.k (R) : Økb;ksykbV esa Al dh vkWDlhdj.k voLFkk +3 gSA mijksDr dFkuksa ds lanHkZ esa] lokZf/kd mfpr mÙkj uhps fn, x;s fodYiksa esa ls pqfu,A (1) (A) lgh ugha gS ijUrq (R) lgh gSA (2) (A) lgh gS ijUrq (R) lgh ugha gSA (3) nksuksa (A) rFkk (R) lgh gSa vkSj (R) lgh O;k[;k gS (A) dhA (4) nksuksa (A) rFkk (R) lgh gSa vkSj (R) lgh O;k[;k ugha gS (A) dhA
💡 Solution & Explanation
In electrolytic reduction of Al2O3 we use cryolite to increase conductivity and decrease melting point. Cryolyte is Na3AlF6, Oxidation number of Al is +3 | JEE MAIN-2021 | DATE : 31-08-2021 (SHIFT-1) | PAPER-1 | OFFICIAL BASED | CHEMISTRY PAGE # 2