1
JEE Main 2022 (Online) 27th July Morning Shift
Numerical
+4
-1
Change Language

In the titration of $$\mathrm{KMnO}_{4}$$ and oxalic acid in acidic medium, the change in oxidation number of carbon at the end point is ___________.

Your input ____
2
JEE Main 2022 (Online) 27th July Morning Shift
Numerical
+4
-1
Change Language

Optical activity of an enantiomeric mixture is $$+12.6^{\circ}$$ and the specific rotation of $$(+)$$ isomer is $$+30^{\circ}$$. The optical purity is __________$$\%$$.

Your input ____
3
JEE Main 2022 (Online) 27th July Morning Shift
Numerical
+4
-1
Change Language

In the following reaction

JEE Main 2022 (Online) 27th July Morning Shift Chemistry - Alcohols, Phenols and Ethers Question 50 English

The $$\%$$ yield for reaction I is $$60 \%$$ and that of reaction II is $$50 \%$$. The overall yield of the complete reaction is __________ $$\%$$. [nearest integer]

Your input ____
4
JEE Main 2022 (Online) 27th July Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Let $$R_{1}$$ and $$R_{2}$$ be two relations defined on $$\mathbb{R}$$ by

$$a \,R_{1} \,b \Leftrightarrow a b \geq 0$$ and $$a \,R_{2} \,b \Leftrightarrow a \geq b$$

Then,

A
$$R_{1}$$ is an equivalence relation but not $$R_{2}$$
B
$$R_{2}$$ is an equivalence relation but not $$R_{1}$$
C
both $$R_{1}$$ and $$R_{2}$$ are equivalence relations
D
neither $$R_{1}$$ nor $$R_{2}$$ is an equivalence relation
JEE Main Papers
2023
2021
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
CBSE
Class 12