JEE Main 2025 · ChemistryMultiple choiceSingle correctMediumMulti-step

JEE Main 7 April 2025, Shift 2, Chemistry Q61

Question 61 of 75 in this shift, Chemistry question 11 of 25, Section A.

'X' is the number of acidic oxides among

\mathrm{VO_2}

\mathrm{V_2O_3}

\mathrm{CrO_3}

\mathrm{V_2O_5}

and

\mathrm{Mn_2O_7}

. The primary valency of cobalt in

\mathrm{[Co(H_2NCH_2CH_2NH_2)_3]_2(SO_4)_3}

is Y. The value of X + Y is __________.

(1)3
(2)2
(3)5Official answer
(4)4

Official answer

Option 3

NTA final key.

Chapter: The d- and f-Block Elements
Topic: d-Block Elements
Idea tested: Acid-Base Character of Oxides

Same idea in other shifts

Asked 5× 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 42 of the 174 JEE Main shifts held from 2017 to 2026.