JEE Main 31 August 2021, Shift 1, Chemistry Q38

Question 38 of 90 in this shift, Chemistry question 8 of 30, Section A.

The major component/ingredient of Portland Cement is :

(1)tricalcium aluminate
(2)dicalcium aluminate
(3)tricalcium silicateOfficial answer
(4)dicalcium silicate

Official answer

Option 3

NTA final key.

Chapter: The s-Block Elements
Topic: s-Block Elements
Idea tested: Portland Cement Composition and Setting

Same idea in other shifts

Asked 2× in all

8 Apr 2023, Shift 2 · Q68For a good quality cement, the ratio of lime to the total of the oxides of Si, Al and Fe should be as close as toMediumSingle 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 108 of the 174 JEE Main shifts held from 2017 to 2026.