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

How can photochemical smog be controlled?

A
By using catalytic convertors in the automobiles/industry.
B
By complete combustion of fuel.
C
By using tall chimneys.
D
By using catalyst.
2
JEE Main 2023 (Online) 1st February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Which of the following complex will show largest splitting of d-orbitals?

A
$$[\mathrm{Fe(C_2O_4)_3]^{3-}}$$
B
$$[\mathrm{Fe(CN)_6]^{3-}}$$
C
$$[\mathrm{Fe(NH_3)_6]^{3+}}$$
D
$$[\mathrm{FeF_6]^{3-}}$$
3
JEE Main 2023 (Online) 1st February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Which of the following are the example of double salt?

A. $$\mathrm{FeSO}_{4} \cdot\left(\mathrm{NH}_{4}\right)_{2} \mathrm{SO}_{4} \cdot 6 \mathrm{H}_{2} \mathrm{O}$$

B. $$\mathrm{CuSO}_{4}\cdot 4 \mathrm{NH}_{3} \cdot \mathrm{H}_{2} \mathrm{O}$$

C. $$\mathrm{K}_{2} \mathrm{SO}_{4} \cdot \mathrm{Al}_{2}\left(\mathrm{SO}_{4}\right)_{3} \cdot 24 \mathrm{H}_{2} \mathrm{O}$$

D. $$\mathrm{Fe}(\mathrm{CN})_{2}\cdot4 \mathrm{KCN}$$

Choose the correct answer :

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

Match List I with List II :

List I List II
A. Slaked lime I. $$\mathrm{NaOH}$$
B. Dead burnt plaster II. $$\mathrm{Ca(OH)_2}$$
C. Caustic soda III. $$\mathrm{Na_2CO_3\cdot 10H_2O}$$
D. Washing soda IV. $$\mathrm{CaSO_4}$$

Choose the correct answer from the options given below :

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