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1
JEE Main 2023 (Online) 1st February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Resonance in carbonate ion $$\left(\mathrm{CO}_{3}{ }^{2-}\right)$$ is

JEE Main 2023 (Online) 1st February Morning Shift Chemistry - Basics of Organic Chemistry Question 11 English

Which of the following is true?

A
It is possible to identify each structure individually by some physical or chemical method.
B
All these structures are in dynamic equilibrium with each other.
C
Each structure exists for equal amount of time.
D
$$\mathrm{CO}_{3}{ }^{2-}$$ has a single structure i.e., resonance hybrid of the above three structures.
2
JEE Main 2023 (Online) 30th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
The most stable carbocation for the following is:

JEE Main 2023 (Online) 30th January Evening Shift Chemistry - Basics of Organic Chemistry Question 9 English
A
b
B
d
C
c
D
a
3
JEE Main 2023 (Online) 30th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
The correct order of $\mathrm{pK}_{\mathrm{a}}$ values for the following compounds is:

JEE Main 2023 (Online) 30th January Evening Shift Chemistry - Basics of Organic Chemistry Question 8 English
A
$ \mathrm{a}>\mathrm{b}>\mathrm{c}>\mathrm{d}$
B
$c > a > d > b$
C
$\mathrm{b}>\mathrm{d}>\mathrm{a}>\mathrm{c}$
D
$b > a > d > c$
4
JEE Main 2023 (Online) 29th January Morning Shift
MCQ (Single Correct Answer)
+4
-1

The increasing order of $$\mathrm{pK_a}$$ for the following phenols is

(A) 2, 4 - Dinitrophenol

(B) 4 - Nitrophenol

(C) 2, 4, 5 - Trimethylphenol

(D) Phenol

(E) 3-Chlorophenol

Choose the correct answer from the option given below :

A
(A), (E), (B), (D), (C)
B
(C), (E), (D), (B), (A)
C
(C), (D), (E), (B), (A)
D
(A), (B), (E), (D), (C)
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