1
MCQ (Single Correct Answer)

JEE Main 2017 (Online) 9th April Morning Slot

The group having triangular planar structures is :
A
BF3, NF3, $$CO_3^{2 - }$$
B
$$CO_3^{2 - }$$, $$NO_3^ - $$, SO3
C
NH3, SO3, $$CO_3^{2 - }$$
D
NCl3, BCl3, SO3

Explanation

(A) BF3 : sp2 Hybridization : Triangular Planar

NF3 : sp3 Hybridization : Tetrahedral

$$CO_3^{2 - }$$ : sp2 Hybridization : Triangular Planar

(B) $$CO_3^{2 - }$$ : sp2 Hybridization : Triangular Planar

$$NO_3^ - $$ : sp2 Hybridization : Triangular Planar

SO3 : sp2 Hybridization : Triangular Planar

(C) NH3 : sp3 Hybridization : Tetrahedral

SO3 : sp2 Hybridization : Triangular Planar

$$CO_3^{2 - }$$ : sp2 Hybridization : Triangular Planar

(D) NCl3 : sp3 Hybridization : Tetrahedral

BCl3 : sp2 Hybridization : Triangular Planar

SO3 : sp2 Hybridization : Triangular Planar
2
MCQ (Single Correct Answer)

JEE Main 2018 (Offline)

According to molecular orbital theory, which of the following will not be a viable molecule?
A
$${\rm H}e_2^{2 + }$$
B
$${\rm H}e_2^{ + }$$
C
$${\rm H}_2^{- }$$
D
$${\rm H}_2^{2 - }$$

Explanation

Note :

According to molecules orbital theory, when a molecule have bond order = 0 then that molecule does not exist.

(a)$$\,\,\,$$ Configuration of $$He_2^{2 + }$$ (2 electrons) is = $${\sigma _{1{s^2}}}$$

$$\therefore\,\,\,$$ Bond order = $${1 \over 2}$$ (2 $$-$$0) = 1

(b)$$\,\,\,$$ Configuration of $$He_2^ + $$ (3 electrons) is = $$\sigma 1{s^2}$$ $$\sigma _{1{s^1}}^ * $$

$$\therefore\,\,\,$$ Bond order = $${1 \over 2}$$ (2 $$-$$1) = 0.5

(c) $$\,\,\,$$ Configuration of $$H_2^ - $$ (3 electrons) is = $${\sigma _{1{s^2}}}$$ $$\sigma _{1{s^1}}^ * $$

$$\therefore$$ Bond order = $${1 \over 2}$$ (2 $$-$$ 1) = 0.5

(d) $$\therefore\,\,\,$$ Configuration of $$He_2^{2 - }$$ is = $${\sigma _{1{s^2}}}\,\,\sigma _{1{s^2}}^ * $$

$$\therefore\,\,\,$$ Bond order = $$ = {1 \over 2}$$ (2 $$-$$ 2) = 0

$$\therefore\,\,\,$$ $$H_2^{2 - }$$ is not a viable molecule.
3
MCQ (Single Correct Answer)

JEE Main 2018 (Offline)

Total number of lone pair of electrons in $${\rm I}_3^ - $$ ion is
A
3
B
9
C
6
D
12

Explanation



$$\therefore\,\,\,$$ Total number of lone pair = 9
4
MCQ (Single Correct Answer)

JEE Main 2018 (Offline)

Which of the following compounds contain(s) no covalent bond(s)? KCl, PH3, O2, B2H6, H2SO4
A
KCl, B2H6
B
KCl, B2H6, PH3
C
KCl, H2SO4
D
KCl

Explanation

Here only KCl is ionic compound all other compound has covalent bond.

Questions Asked from Chemical Bonding & Molecular Structure

On those following papers in MCQ (Single Correct Answer)
Number in Brackets after Paper Name Indicates No of Questions
AIEEE 2002 (5)
keyboard_arrow_right
AIEEE 2003 (4)
keyboard_arrow_right
AIEEE 2004 (5)
keyboard_arrow_right
AIEEE 2005 (1)
keyboard_arrow_right
AIEEE 2006 (3)
keyboard_arrow_right
AIEEE 2007 (4)
keyboard_arrow_right
AIEEE 2008 (2)
keyboard_arrow_right
AIEEE 2009 (1)
keyboard_arrow_right
AIEEE 2011 (3)
keyboard_arrow_right
AIEEE 2012 (2)
keyboard_arrow_right
JEE Main 2013 (Offline) (2)
keyboard_arrow_right
JEE Main 2015 (Offline) (1)
keyboard_arrow_right
JEE Main 2016 (Online) 9th April Morning Slot (1)
keyboard_arrow_right
JEE Main 2016 (Online) 10th April Morning Slot (1)
keyboard_arrow_right
JEE Main 2017 (Offline) (1)
keyboard_arrow_right
JEE Main 2017 (Online) 8th April Morning Slot (2)
keyboard_arrow_right
JEE Main 2017 (Online) 9th April Morning Slot (1)
keyboard_arrow_right
JEE Main 2018 (Offline) (3)
keyboard_arrow_right
JEE Main 2018 (Online) 15th April Morning Slot (4)
keyboard_arrow_right
JEE Main 2018 (Online) 15th April Evening Slot (2)
keyboard_arrow_right
JEE Main 2018 (Online) 16th April Morning Slot (2)
keyboard_arrow_right
JEE Main 2019 (Online) 9th January Morning Slot (1)
keyboard_arrow_right
JEE Main 2019 (Online) 9th January Evening Slot (1)
keyboard_arrow_right
JEE Main 2019 (Online) 10th January Morning Slot (2)
keyboard_arrow_right
JEE Main 2019 (Online) 10th January Evening Slot (2)
keyboard_arrow_right
JEE Main 2019 (Online) 12th January Evening Slot (1)
keyboard_arrow_right
JEE Main 2019 (Online) 8th April Evening Slot (4)
keyboard_arrow_right
JEE Main 2019 (Online) 9th April Morning Slot (1)
keyboard_arrow_right
JEE Main 2019 (Online) 9th April Evening Slot (4)
keyboard_arrow_right
JEE Main 2019 (Online) 10th April Morning Slot (2)
keyboard_arrow_right
JEE Main 2019 (Online) 12th April Morning Slot (1)
keyboard_arrow_right
JEE Main 2020 (Online) 7th January Morning Slot (2)
keyboard_arrow_right
JEE Main 2020 (Online) 7th January Evening Slot (1)
keyboard_arrow_right
JEE Main 2020 (Online) 8th January Morning Slot (1)
keyboard_arrow_right
JEE Main 2020 (Online) 8th January Evening Slot (1)
keyboard_arrow_right
JEE Main 2020 (Online) 9th January Morning Slot (1)
keyboard_arrow_right
JEE Main 2020 (Online) 9th January Evening Slot (1)
keyboard_arrow_right
JEE Main 2020 (Online) 2nd September Morning Slot (1)
keyboard_arrow_right
JEE Main 2020 (Online) 2nd September Evening Slot (2)
keyboard_arrow_right
JEE Main 2020 (Online) 3rd September Morning Slot (1)
keyboard_arrow_right
JEE Main 2020 (Online) 3rd September Evening Slot (2)
keyboard_arrow_right
JEE Main 2020 (Online) 4th September Morning Slot (1)
keyboard_arrow_right
JEE Main 2020 (Online) 4th September Evening Slot (1)
keyboard_arrow_right
JEE Main 2020 (Online) 5th September Morning Slot (2)
keyboard_arrow_right
JEE Main 2020 (Online) 5th September Evening Slot (1)
keyboard_arrow_right
JEE Main 2021 (Online) 24th February Morning Slot (1)
keyboard_arrow_right
JEE Main 2021 (Online) 24th February Evening Slot (2)
keyboard_arrow_right
JEE Main 2021 (Online) 25th February Morning Slot (1)
keyboard_arrow_right
JEE Main 2021 (Online) 25th February Evening Shift (1)
keyboard_arrow_right
JEE Main 2021 (Online) 26th February Morning Shift (1)
keyboard_arrow_right
JEE Main 2021 (Online) 26th February Evening Shift (1)
keyboard_arrow_right
JEE Main 2021 (Online) 16th March Morning Shift (1)
keyboard_arrow_right
JEE Main 2021 (Online) 17th March Morning Shift (1)
keyboard_arrow_right
JEE Main 2021 (Online) 17th March Evening Shift (1)
keyboard_arrow_right
JEE Main 2021 (Online) 18th March Evening Shift (1)
keyboard_arrow_right
JEE Main 2021 (Online) 20th July Evening Shift (1)
keyboard_arrow_right
JEE Main 2021 (Online) 22th July Evening Shift (1)
keyboard_arrow_right
JEE Main 2021 (Online) 25th July Evening Shift (2)
keyboard_arrow_right
JEE Main 2021 (Online) 26th August Evening Shift (1)
keyboard_arrow_right
JEE Main 2021 (Online) 27th August Morning Shift (2)
keyboard_arrow_right

EXAM MAP

Joint Entrance Examination

JEE Advanced JEE Main

Medical

NEET

Graduate Aptitude Test in Engineering

GATE CSE GATE EE GATE ECE GATE ME GATE CE GATE PI GATE IN