Question

$Ni$ is metal but dissolved in $CO$ gas due to formation of $A$. $A$ decomposes into metal.
(a)What is $A$ ?
(b) $A$ is formed at what temperature
(c) $A$ decomposes into metal at what temperature

• A. (a) $Ni(CO{)}_4$; (b)${28}^{0}C$ (c) ${230}^{0}C$
• B. (a) $Ni(CO{)}_4$; (b)${48}^{0}C$ (c) ${330}^{0}C$
• C. (a) $Ni(CO{)}_2$; (b)${14}^{0}C$ (c) ${230}^{0}C$
• D. (a) $Ni(CO{)}_2$; (b)${56}^{0}C$ (c) ${125}^{0}C$

Answer 1

The correct option is A (a) $Ni(CO{)}_4$; (b)${28}^{0}C$ (c) ${230}^{0}C$

Ni combines with $CO$ to form $Ni(CO{)}_4$. Hence, the compound A is $Ni(CO{)}_4$.
It is formed at ${28}^{o}C$.
It decomposes at ${230}^{o}C$.
$Ni+4CO\rightleftharpoons Ni(CO{)}_4$