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 53 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) 1st February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

Which of the following represents the lattice structure of $$\mathrm{A_{0.95}O}$$ containing $$\mathrm{A^{2+},A^{3+}}$$ and $$\mathrm{O^{2-}}$$ ions?

JEE Main 2023 (Online) 1st February Morning Shift Chemistry - Solid State Question 10 English

A
B only
B
A and B only
C
A only
D
B and C only
3
JEE Main 2023 (Online) 1st February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

Choose the correct statement(s) :

A. Beryllium oxide is purely acidic in nature.

B. Beryllium carbonate is kept in the atmosphere of $$\mathrm{CO_2}$$.

C. Beryllium sulphate is readily soluble in water.

D. Beryllium shows anomalous behaviour.

Choose the correct answer from the options given below :

A
A only
B
B, C and D only
C
A, B and C only
D
A and B only
4
JEE Main 2023 (Online) 1st February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Match List I with List II

List I List II
Test Functional group / Class of Compound
A. Molisch's Test I. Peptide
B. Biuret Test II. Carbohydrate
C. Carbylamine Test III. Primary amine
D. Schiff's Test IV. Aldehyde

Choose the correct answer from the options given below :

A
(A) - III, (B) - IV, (C) - II, (D) - I
B
(A) - II, (B) - I, (C) - III, (D) - IV
C
(A) - III, (B) - IV, (C) - I, (D) - II
D
(A) - I, (B) - II, (C) - III, (D) - IV
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