Single Choice

$$M(CO)_{x} (NO)_{y} \underset {-CO}{\xrightarrow {+NO}}M(NO)_{z}$$ Where $$EAN$$ of metal $$(M)$$ in both product and reactant is same and it is $$54$$. Then calculate value of $$(x + y - z)$$. (where $$x, y$$ and $$z$$ are natural numbers and $$M$$ belong to $$6^{th}$$ group according to long form of periodic table).

A1
B4
C6
DNone of these
Correct Answer

Solution

$$\text{Effective atomic number (EAN), }$$a number that represents the total number of electrons surrounding the nucleus of a metal atom in a metal complex. It is composed of the metal atom's electrons and the bonding electrons from the surrounding electron-donating atoms and molecules.
and calculated as

$$EAN= \text{Atomic number of central atom - oxidation number + Total number of electron gain}$$

here,
$$Mo(CO)_{x}(NO)_{y} \underset {-CO}{\xrightarrow {+NO}} Mo(NO)_{z}$$

according to question
$$\text{EAN of M in reactant = EAN of M in product}=54$$
i.e

$$M-0+(1\times x+1 \times y)=M-0+1\times z=54$$

$$M+x+y=M+z=54$$

$$M+x+y=M+z$$

$$\Rightarrow x+y-z=0$$
thus, the correct answer is D.

SIMILAR QUESTIONS

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