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JEE 2020 Chemistry: Chemical Bonding and Molecular Structure-1 (18.07.2019)
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Question 1
Which of the following molecules has two sigma (σ) and two pi(π) bonds?
Question 2
Which of the following species has paired electrons?
Question 3
Which of the following compunds contain(s) no covalent bond(s)?
Question 4
The decreasing order of bond angles in 
and 
is :
and is :Question 5
Which one of the following molecules is polar?
Question 6
A metal, M forms chlorides in its + 2 and + 4 oxidation states. Which of the following statements about these chlorides is correct?
Question 7
The formation of molecular complex
BF3 – NH3 results in a change in hybridization of boron
BF3 – NH3 results in a change in hybridization of boron
Question 8
After understanding the assertion and reason, choose the correct option.
Assertion:
In the bonding molecular orbital (MO) of H2, electron density is increased between the nuclei.
Reason:
The bonding MO is
, which shows destructive interference of the combining electron waves.
Assertion:
In the bonding molecular orbital (MO) of H2, electron density is increased between the nuclei.
Reason:
The bonding MO is
, which shows destructive interference of the combining electron waves. Question 9
Which among the following elements has the highest first ionization enthalpy?
Question 10
Although CN- ion and N2 molecule are isoelectronic, yet N2 molecule is chemically inert because of
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Jul 18JEE & BITSAT
