1
JEE Main 2023 (Online) 29th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The magnetic behaviour of $$\mathrm{Li_2O,Na_2O_2}$$ and $$\mathrm{KO_2}$$, respectively, are :

A
paramagnetic, paramagnetic and diamagnetic
B
paramagnetic, diamagnetic and paramagnetic
C
diamagnetic, paramagnetic and diamagnetic
D
diamagnetic, diamagnetic and paramagnetic
2
JEE Main 2023 (Online) 29th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Compound that will give positive Lassaigne's test for both nitrogen and halogen is :

A
$$\mathrm{NH_2OH.HCl}$$
B
$$\mathrm{N_2H_4.HCl}$$
C
$$\mathrm{CH_3NH_2.HCl}$$
D
$$\mathrm{NH_4Cl}$$
3
JEE Main 2023 (Online) 29th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

Match List I with List II.

List I List II
Antimicrobials Names
(A) Narrow Spectrum Antibiotic (I) Furacin
(B) Antiseptic (II) Sulphur dioxide
(C) Disinfectants (III) Penicillin G
(D) Broad spectrum antibiotic (IV) Chloramphenicol

Choose the correct answer from the options given below :

A
(A) - III, (B) - I, (C) - II, (D) - IV
B
(A) - II, (B) - I, (C) - IV, (D) - III
C
(A) - I, (B) - II, (C) - IV, (D) - III
D
(A) - III, (B) - I, (C) - IV, (D) - II
4
JEE Main 2023 (Online) 29th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

The correct order of hydration enthalpies is

(A) K$$^+$$

(B) Rb$$^+$$

(C) Mg$$^{2+}$$

(D) Cs$$^+$$

(E) Ca$$^{2+}$$

Choose the correct answer from the options given below :

A
E > C > A > B > D
B
C > A > E > B > D
C
C > E > A > D > B
D
C > E > A > B > D
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