Q. No.Given below are two statement :
| Statement-I : | All the given pairs of oxides—(PbO, PbO₂), (SnO, SnO₂), and (GeO, GeO₂)—are amphoteric in nature |
| Statement-II : | The molecules AlCl₃, BH₃, BeH₂, and NO₂ all have incomplete octets around their central atoms. |
| 1. | Both the statements are correct |
| 2. | Statement-I is correct ; Statement-II is incorrect |
| 3. | Statement-I is incorrect; Statement-II is correct |
| 4. | Both the statements are incorrect |
Subtopic: Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
Level 3: 35%-60%
Please attempt this question first.
Hints
Among the following species \(\mathrm{O}_2^{+}, \mathrm{N}_2^{-}, \mathrm{N}_2^{2-}\) and \({O}_2^{-}\) which have same bond order as well as paramagnetic in nature.
1. \(\mathrm{N}_2^{-}, \mathrm{N}_2^{2-}\)
2. \(\mathrm{O}_2^{+}, \mathrm{N}_2^{-}\)
3. \(\mathrm{O}_2^{+}, \mathrm{O}_2^{-}\)
4. \(\mathrm{O}_2^{-}, \mathrm{N}_2^{-}\)
1. \(\mathrm{N}_2^{-}, \mathrm{N}_2^{2-}\)
2. \(\mathrm{O}_2^{+}, \mathrm{N}_2^{-}\)
3. \(\mathrm{O}_2^{+}, \mathrm{O}_2^{-}\)
4. \(\mathrm{O}_2^{-}, \mathrm{N}_2^{-}\)
Subtopic: M.O.T | Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
87%
Level 1: 80%+
Please attempt this question first.
Hints
Consider the following statements from A to E:
Select the correct statements(s):
1. B, C
2. A, B, C
3. C, D, E
4. B, E
| (A) | \(NF_3\) has more dipole moment than \(NH_3\) |
| (B) | \(O^{-2}_2\) and \(F_2\) both have same bond order |
| (C) | In \(O_3\) central oxygen atom has -1 formal charge |
| (D) | In \(NO_2\) all the atoms follow octet rule, so it is stable |
| (E) | \(BeH_2\) is planar |
Select the correct statements(s):
1. B, C
2. A, B, C
3. C, D, E
4. B, E
Subtopic: Types of Chemical Bond | M.O.T | Octate, Isoelectronic Species, Lewis Structure & Formal Charge | van der Waal Force & Hydrogen Bonding |
76%
Level 2: 60%+
Please attempt this question first.
Hints
Please attempt this question first.
Consider the structure of \(HNO_3\):
Select the correct option having formal charges on I, II, III & IV respectively:
1. –1, 1, +1, 0
2. 0, 0, +1, –1
3. –1, 0, 0, +1
4. +1, –1, 0, 0
Select the correct option having formal charges on I, II, III & IV respectively:
1. –1, 1, +1, 0
2. 0, 0, +1, –1
3. –1, 0, 0, +1
4. +1, –1, 0, 0
Subtopic: Octate, Isoelectronic Species, Lewis Structure & Formal Charge | Resonance & Nature of Compounds |
86%
Level 1: 80%+
Please attempt this question first.
Hints
Match the molecules in List-I based on their classification according to the octet rule with the correct examples in List-II:
Choose the correct answer from the options given below:
| List-I (Classification of molecules based on octet rule) | List-II (Example) |
||
| A. |
Molecules that adhere to the octet rule. |
I. | NO, NO2 |
| B. | Molecules with an incomplete octet | II. | BCl3 , AlCl3 |
| C. | Molecules with incomplete octets with odd electron | III. | H2SO4 , PCl5 |
| D. | Molecules with an expanded octet | IV. | CCl4 , CO2 |
| 1. | A-IV, B-II, C-I, D-III | 2. | A-III, B-II, C-I, D-IV |
| 3. | A-IV, B-I, C-III, D-II | 4. | A-II, B-IV, C-III, D-I |
Subtopic: Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
87%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Subtopic: Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
76%
Level 2: 60%+
Please attempt this question first.
Hints
Please attempt this question first.
Subtopic: Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
61%
Level 2: 60%+
Please attempt this question first.
Hints
Please attempt this question first.
How many of the given compounds follow(s) octet rule?
\(\mathrm{H}_2 \mathrm{SO}_4, \mathrm{CO}_2, \mathrm{SO}_2, \mathrm{SO}_3, \mathrm{H}_2 \mathrm{SO}_3, \mathrm{NO}_2, \mathrm{HNO}_3\)
\(\mathrm{H}_2 \mathrm{SO}_4, \mathrm{CO}_2, \mathrm{SO}_2, \mathrm{SO}_3, \mathrm{H}_2 \mathrm{SO}_3, \mathrm{NO}_2, \mathrm{HNO}_3\)
| 1. | Two (2) | 2. | Five (5) |
| 3. | One (1) | 4. | Six (6) |
Subtopic: Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
55%
Level 3: 35%-60%
Please attempt this question first.
Hints
Please attempt this question first.
Which of the following compound(s) is/are paramagnetic in nature?
(a) NO2
(b) NO
(c) K2O
(d) Na2O2
1. (a) & (b) only
2. (a), (b) & (c) only
3. (a), (b), (c) & (d)
4. (a), (b) & (d) only
(a) NO2
(b) NO
(c) K2O
(d) Na2O2
1. (a) & (b) only
2. (a), (b) & (c) only
3. (a), (b), (c) & (d)
4. (a), (b) & (d) only
Subtopic: Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
64%
Level 2: 60%+
Please attempt this question first.
Hints
Please attempt this question first.
Find out the magnetic properties of Li2O, KO2, and MgO in that order.
1. Diamagnetic, Paramagnetic and Diamagnetic
2. Paramagnetic, Paramagnetic and Diamagnetic
3. Diamagnetic, Paramagnetic and Paramagnetic
4. Diamagnetic, Diamagnetic and Diamagnetic
1. Diamagnetic, Paramagnetic and Diamagnetic
2. Paramagnetic, Paramagnetic and Diamagnetic
3. Diamagnetic, Paramagnetic and Paramagnetic
4. Diamagnetic, Diamagnetic and Diamagnetic
Subtopic: M.O.T | Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
73%
Level 2: 60%+
Please attempt this question first.
Hints
Please attempt this question first.
© 2026 GoodEd Technologies Pvt. Ltd.