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JEE Main 2021 · ChemistryMultiple choiceSingle correctEasyRecall

JEE Main 3 August 2021, Shift 2, Chemistry Q37

Question 37 of 90 in this shift, Chemistry question 7 of 30, Section A.

Silicones are group of organosilicon polymers. Which one among the following acts as a chain terminating unit in silicone polymerization?

(1) $\mathrm{Si(CH_3)_4}$
(2) $\mathrm{Si(CH_3)_3Cl}$ Official answer
(3) $\mathrm{Si(CH_3)_2Cl_2}$
(4) $\mathrm{Si(CH_3)Cl_3}$

Official answer

Option 2

NTA final key.

Chapter: The p-Block Elements
Topic: Group 13 & 14
Idea tested: Silicones and Zeolites

Same idea in other shifts

Asked 2× in all

29 Jun 2022, Shift 1 · Q70Match List - I with List - II. List - I (Metal) (A) Cs (B) Ga (C) B (D) Si List - II (Application) (I) High temperature thermometer (II)…MediumMatch the list

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.