EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 4 - Chemical Bonding and Molecular Structure>WBJEE 2019>Q 1

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The melting points of (i) ${BeCl}_{2}$ (ii) ${CaCl}_{2}$ and (iii) ${HgCl}_{2}$ follows the order

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Important Questions on Chemical Bonding and Molecular Structure

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 4 - Chemical Bonding and Molecular Structure>WBJEE 2019>Q 2

The molecule/molecules that has/have delocalised lone pair(s) of electrons is/are

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 4 - Chemical Bonding and Molecular Structure>WBJEE 2019>Q 3

The

H - N - H

angle in ammonia is

107.6 °,

while the

H - P - H

angle in phosphine is

93.5 ° .

Relative to phosphine, the

p

-character of the lone-pair on ammonia is expected to be

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 4 - Chemical Bonding and Molecular Structure>WBJEE 2018>Q 4

Which of the following has the strongest H-bond ?

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 4 - Chemical Bonding and Molecular Structure>WBJEE 2020>Q 5

Bond order of

{He}_{2}, {He}_{2}^{+}

and

{He}_{2}^{2 +}

are respectively

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 4 - Chemical Bonding and Molecular Structure>WBJEE 2020>Q 6

A homonuclear diatomic gas molecule shows

2

-electron magnetic moment. The one-electron and two-electron reduced species obtained from above gas molecule can act as both oxidising and reducing agents. When the gas molecule is one-electron oxidised the bond length decreases compared to the neutral molecule. The gas molecule is

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 4 - Chemical Bonding and Molecular Structure>WBJEE 2019>Q 7

Which of these species will have non-zero magnetic moment?

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 4 - Chemical Bonding and Molecular Structure>WBJEE 2018>Q 8

Which statements are correct for the peroxide ion ?