MCQ
After understanding the assertion and reason, choose the correct option.
Assertion : In the bonding molecular orbital $(MO)$ of $H_2,$ electron density is increased between the nuclei.
Reason : The bonding $MO$ is ${\psi _A}\, + \,\,{\psi _{B,}}$ which shows destructive interference of the combining electron waves.
  • A
    Assertion is incorrect, reason is correct.
  • Assertion is correct, reason is incorrect
  • C
    Assertion and reason are correct and reason is the correct explanation for the assertion
  • D
    Assertion and reason are correct, but reason is not the correct explanation for the assertion

Answer

Correct option: B.
Assertion is correct, reason is incorrect
b
Assertion is correct but reason is incorrect. Bonding $MO$ shows constructive interference of the combining electron oxide waves.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Which of the following compounds contain at least one secondary alcohol ?
Assertion : Reaction quotient is defined in the same way as equilbrium constant at any stage of the reaction.
Reason : If $Q_c$ (reaction quotient) $ < K_C$ (equilibrium constant) reaction moves in direction of reactants.
The reaction of hydrogen and iodinemonochloride is given as :

$H_{2(g)} + 2ICl_{(g)} \rightarrow 2HCl_{(g)} + I_{2(g)}$

This reaction is of first order with respect to $H_{2(g)}$ and $ICl_{(g)},$

following mechanisms were proposed.

Mechanism $A\, :$

$H_{2(g)} + 2ICl_{(g)} \rightarrow 2HCl_{(g)} + I_{2(g)}$

Mechanism $B\, :$

$H_{2(g)} + ICl_{(g)} \rightarrow HCl_{(g)} + HI_{(g)}\, ;$     slow

$HI_{(g)} + ICl_{(g)} \rightarrow HCl_{(g)} + I_{2(g)} \,;$      fast

Which of the above mechanism(s) can beconsistent with the given information about the reaction ?

The graph which represents the following reaction is :

$\left( C _6 H _5\right)_3 C - Cl \frac{ OH ^{-}}{\text {Pyridine }}\left( C _6 H _5\right)_3 C - OH$

Select the incorrect option?
Noble gases do not react with other elements because
In which of the following molecules all the bonds are not equal ?
The equivalent weight of $H_3PO_4$  in following reaction is 
$H_3PO_4 + Ca(OH)_2 \to  CaHPO_4 + 2H_2O$
Heating an aqueous solution of aluminium chloride to dryness will give
Total number of isomers, considering both structural and stereoisomers, of cyclic ethers with the molecular formula $C _4 H _8 O$ is. . . . . .