1
JEE Main 2021 (Online) 27th August Morning Shift
MCQ (Single Correct Answer)
+4
-1
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : Synthesis of ethyl phenyl ether may be achieved by Williamson synthesis.

Reason (R) : Reaction of bromobenzene with sodium ethoxide yields ethyl phenyl ether.

In the light of the above statements, choose the most appropriate answer from the options given below :
A
Both (A) and (R) are correct and (R) is the correct explanation of (A)
B
(A) is correct but (R) is not correct
C
(A) is not correct but (R) is correct
D
Both (A) and (R) are correct but (R) is not the correct explanation of (A).
2
JEE Main 2021 (Online) 27th August Morning Shift
MCQ (Single Correct Answer)
+4
-1
In the following sequence of reactions the P is :

JEE Main 2021 (Online) 27th August Morning Shift Chemistry - Haloalkanes and Haloarenes Question 56 English
A
JEE Main 2021 (Online) 27th August Morning Shift Chemistry - Haloalkanes and Haloarenes Question 56 English Option 1
B
JEE Main 2021 (Online) 27th August Morning Shift Chemistry - Haloalkanes and Haloarenes Question 56 English Option 2
C
JEE Main 2021 (Online) 27th August Morning Shift Chemistry - Haloalkanes and Haloarenes Question 56 English Option 3
D
JEE Main 2021 (Online) 27th August Morning Shift Chemistry - Haloalkanes and Haloarenes Question 56 English Option 4
3
JEE Main 2021 (Online) 27th August Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
The unit of the van der Waals gas equation parameter 'a' in $$\left( {P + {{a{n^2}} \over {{V^2}}}} \right)(V - nb) = nRT$$ is :
A
kg m s$$-$$2
B
dm3 mol$$-$$1
C
kg m s$$-$$1
D
atm dm6 mol$$-$$2
4
JEE Main 2021 (Online) 27th August Morning Shift
MCQ (Single Correct Answer)
+4
-1
In polythionic acid, H2SxO6 (x = 3 to 5) the oxidation state(s) of sulphur is/are :
A
+ 5 only
B
+ 6 only
C
+ 3 and + 5 only
D
0 and + 5 only
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