Assertion : Cr(VI) in the form of dichromate | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) In $d$-block elements,the stability of the highest oxidation state increases down the group. $Cr(VI)$ is a strong oxidising agent because it is un

Vedclass · Accepted Answer

Both Assertion $\&$ Reason are True $\&$ the Reason is a correct explanation of the Assertion.

Vedclass · Answer

(A) In $d$-block elements,the stability of the highest oxidation state increases down the group. $Cr(VI)$ is a strong oxidising agent because it is unstable and tends to get reduced to $Cr(III)$.Conversely,$Mo(VI)$ and $W(VI)$ are much more stable than $Cr(VI)$,which makes $MoO_3$ and $WO_3$ poor oxidising agents.Therefore,both the Assertion and the Reason are true,and the Reason correctly explains why $Cr(VI)$ acts as a strong oxidising agent while $Mo(VI)$ and $W(VI)$ do not.

Assertion : $Cr(VI)$ in the form of dichromate in acidic medium is a strong oxidising agent whereas $MoO_3$ and $WO_3$ are not.
Reason : $Mo(VI)$ and $W(VI)$ are found to be more stable than $Cr(VI)$.

Similar Questions

Fill in the blanks:
$(a)$ The $4f$ and $5f$ series elements are known as lanthanoids and actinoids,respectively.
$(b)$ In transition elements,electrons are filled in the $d$-orbitals of the .......... energy levels.

Which of the following compounds is expected to be colourless?

Ferrous ion changes to $X$ ion upon reacting with acidified hydrogen peroxide. The number of $d$-electrons present in $X$ and its magnetic moment (in $BM$) are,respectively:

The electronic configuration of the last element of the volatile metal group is:

The electronic configuration of copper $({_{29}}Cu)$ is

Vedclass Test Series

Exam Paper Generator

Online Exam Module

Assertion : $Cr(VI)$ in the form of dichromate in acidic medium is a strong oxidising agent whereas $MoO_3$ and $WO_3$ are not.Reason : $Mo(VI)$ and $W(VI)$ are found to be more stable than $Cr(VI)$.