261.

CO binds itself to metal atoms through :

• carbon atom only

• oxygen atom only

• carbon and oxygen atom

• does not bind

Match list I with list II and select the correct answer using the codes given below the lists.

List I Metal ion	List II Magnetic moment (B.M)
A. Cr3+	1.  $\sqrt{35}$
B.  Fe2+	2.  $\sqrt{30}$
C. Ni2+	3.  $\sqrt{24}$
D. Mn2+	4.  $\sqrt{15}$
	5.  $\sqrt{8}$

• A-1, B-3, C-5, D-4

• A-2, B-3,C-5,D-1

• A-4, B-3, C-5, D-1

• A-4, B-5, C-3, D-1

Assertion:

 is named as tetrakis (ethylene-diammine)$\mathrm{\mu }-$hydroxo-m-imido dicobalt (III) ion.

Reason : In naming polynuclear complexes i.e., containing two or more metal atoms joined by bridging ligands, the word $\mathrm{\mu }$ is added with hyphen before the name of such ligands.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

Which of the following is considered as an anticancer species?

Assertion : Al forms [AlF₆]^3- but B does not form [BF₆]^3-.

Reason : B does not react with fluorine.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false

Which of the following metal ions will form complexes with the same magnetic moment and geometry irrespective of the nature of ligands?

• Ni²⁺

• Fe²⁺

• Cu²⁺

• Co²⁺

Wavelength of red light is absorbed by the complex

• [Cu(CN)₄]^2-

• [Cu(NH₃)₄]²⁺

• CuSO₄

• Cu(CN)₂

In the change[Cu(H₂O)₆F]²⁺ $\stackrel{\mathrm{HCl}}{\to }$ [CuCl(H₂O)₅]⁺, the colour changes from

• blue to green

• blue to pink

• pink to green

• pink to blue

Assertion : In high spin situation, configuration
of d⁵ ions will be ${\mathrm{t}}_{2\mathrm{g}}^3, {\mathrm{e}}_{\mathrm{g}}^2$.

Reason : In high spin situation, pairing energy is less than crystal field energy.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

Which of the following does not contain any coordinate bond?

• H₃O⁺

• BF${}_4^{-}$

• HF${}_2^{-}$

• NH${}_4^{+}$