Assertion A: absorbs at lower wavelength of light with respect to . Reason R: It is because the wavelength of the light absorbed depends on the oxidation state of the metal ion. [2023]

STUDY MATERIALS
COURSES
MORE
SUCCESS STORY
ADMISSION
STORE

Back

JEE ADVANCE

CLASS XI - XII
CRASH COURSE

CLASS XI - XII

CRASH COURSE

JEE MAIN

CLASS XI - XII
CRASH COURSE

CLASS XI - XII

CRASH COURSE

NEET

CLASS XI - XII
CRASH COURSE

CLASS XI - XII

CRASH COURSE

BITSAT

CLASS XI - XII

CLASS XI - XII

CBSE BOARD

CLASS IX

CLASS X

CLASS XI

CLASS XII

CLASS VI

CLASS VII

CLASS VIII

UP BOARD

CLASS IX
CLASS X
CLASS XI
CLASS XII

CLASS IX

CLASS X

CLASS XI

CLASS XII

CUET

CRASH COURSE

CRASH COURSE

Courses

CLASSROOM COURSES
ONLINE COURSES

ONLINE COURSES

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

Assertion A: ${[CoCl {({NH}_{3})}_{5}]}^{2 +}$ absorbs at lower wavelength of light with respect to ${[Co {({NH}_{3})}_{5} (H_{2} O)]}^{3 +}$ .

Reason R: It is because the wavelength of the light absorbed depends on the oxidation state of the metal ion.

In the light of the above statements, choose the correct answer from the options given below: [2023]

1 A is false but R is true

2 Both A and R are true and R is the correct explanation of A

3 A is true but R is false

4 Both A and R are true but R is NOT the correct explanation of A

Ans.
(1)

${Cl}^{-} is weaker than H_{2} O$

$Δ$ ${Cl}^{-} < H_{2} O$

$λ$ ${Cl}^{-} > H_{2} O$

$Oxidation state affects the value of Δ as well as λ .$

$CFSE is higher for {[Co {({NH}_{3})}_{5} H_{2} O]}^{3 +}, hence it will absorb at lower wavelength.$

Solution

1 A is false but R is true

2 Both A and R are true and R is the correct explanation of A

3 A is true but R is false

4 Both A and R are true but R is NOT the correct explanation of A

Ans.
(1)

${Cl}^{-} is weaker than H_{2} O$

$Δ$ ${Cl}^{-} < H_{2} O$

$λ$ ${Cl}^{-} > H_{2} O$

$Oxidation state affects the value of Δ as well as λ .$

$CFSE is higher for {[Co {({NH}_{3})}_{5} H_{2} O]}^{3 +}, hence it will absorb at lower wavelength.$

Want Us to Email you About Special Offers & Updates?

Solution

1 A is false but R is true

2 Both A and R are true and R is the correct explanation of A

3 A is true but R is false

4 Both A and R are true but R is NOT the correct explanation of A

Ans. (1) Cl- is weaker than H2O Δ Cl-<H2O λ Cl->H2O Oxidation state affects the value of Δ as well as λ. CFSE is higher for [Co(NH3)5H2O]3+, hence it will absorb at lower wavelength.

Want Us to Email you About Special Offers & Updates?

Ans.
(1)

${Cl}^{-} is weaker than H_{2} O$

$Δ$ ${Cl}^{-} < H_{2} O$

$λ$ ${Cl}^{-} > H_{2} O$

$Oxidation state affects the value of Δ as well as λ .$

$CFSE is higher for {[Co {({NH}_{3})}_{5} H_{2} O]}^{3 +}, hence it will absorb at lower wavelength.$