EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 13 - Chemical Bonding and Molecular Structure>JEE Main 17 March 2021 Shift 2>Q 5

EASY

JEE Main

IMPORTANT

Earn 100

The total number of $C - C$ sigma bond/s in mesityl oxide $(C_{6} H_{10} O)$ is (Round off to the Nearest Integer).

16.67% studentsanswered this correctly

Important Questions on Chemical Bonding and Molecular Structure

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 13 - Chemical Bonding and Molecular Structure>JEE Main 17 March 2021 Shift 1>Q 6

A central atom in a molecule has two lone pairs of electrons and forms three single bonds. The shape of this molecule is

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 13 - Chemical Bonding and Molecular Structure>JEE Main 16 March 2021 Shift 1>Q 7

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R :

Assertion A : The $H - O - H$ bond angle in water molecule is $104.5 °$ .

Reason R : The lone pair $-$ lone pair repulsion of electrons is higher than the bond pair $-$ bond pair repulsion.

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 13 - Chemical Bonding and Molecular Structure>JEE Main - 9th January 2020 Shift 2>Q 8

The number of

s p^{2}

hybrid orbitals in a molecule of benzene is:

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 13 - Chemical Bonding and Molecular Structure>JEE Main - 9th January 2020 Shift 1>Q 9

If enthalpy of atomization for

B r_{2} (l)

is

x k J / m o l

and bond enthalpy for

B r_{2}

is

y k J / m o l

, the relation between them

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 13 - Chemical Bonding and Molecular Structure>JEE Main - 9th January 2019 Shift 2>Q 10

In which of the following processes, the bond order has increased and paramagnetic character has changed to diamagnetic?

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 13 - Chemical Bonding and Molecular Structure>JEE Main - 9th January 2019 Shift 1>Q 11

According to molecular orbital theory, which of the following is true with respect to

{Li}_{2}^{+}

and

{Li}_{2}^{-}

?

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 13 - Chemical Bonding and Molecular Structure>JEE Main - 9th April 2019 Shift 2>Q 12

Among the following species, the diamagnetic molecule is:

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 13 - Chemical Bonding and Molecular Structure>JEE Main - 9th April 2019 Shift 2>Q 13

H F

has highest boiling point among hydrogen halides, because it has: