274183
The correct pair(s) of the ambident nucleophiles is (are): (i) $\mathrm{AgCN} / \mathrm{KCN}$ (ii) $\mathrm{RCOOAg} / \mathrm{RCOOK}$ (iii) $\mathrm{AgNO}_{2} / \mathrm{KNO}_{2}$ (iv) $\mathrm{AgI} / \mathrm{KI}$
1 (ii) and (iii) only
2 (ii) only
3 (i) and (iii) only
4 (i) only
Explanation:
(C) : The nucleophile that can attack through two different sites are known as ambident nucleophiles $\mathrm{AgCN} / \mathrm{KCN}$ and $\mathrm{AgNO}_{2} / \mathrm{KNO}_{2}$ are both ambident nucleophile.
JEE Main 17.03.2021
COORDINATION COMPOUNDS
274192
Which among the following is the strongest ligand?
1 $\mathrm{CN}^{-}$
2 $\mathrm{NH}_{3}$
3 $\mathrm{CO}$
4 En
Explanation:
(C) : CO is strongest ligand among the following because both $\sigma$ and $\pi$ bond is formed due to synergic effect.
Karnataka-CET-2019
COORDINATION COMPOUNDS
274200
The ligand called $\pi$-acid is
1 $\mathrm{CO}$
2 $\mathrm{NH}_{3}$
3 $\mathrm{C}_{2} \mathrm{O}_{4}^{2-}$
4 ethylene diamine
Explanation:
(A) : An example of a $\pi$-acid ligand is carbon monoxide (CO). It is a good pi acceptor (lewis acid) due to empty pi orbital's and good sigma donor.
COMEDK-2019
COORDINATION COMPOUNDS
274206
Iron carbonyl, $\mathrm{Fe}(\mathrm{CO})_{5}$ is
1 tetranuclear
2 mononuclear
3 trinuclear
4 dinuclear
Explanation:
(B) : Iron carbonyl, $\left[\mathrm{Fe}(\mathrm{CO})_{5}\right]$ is mononuclear complex because in $\mathrm{Fe}(\mathrm{CO})_{5}$ only one central metal is involved in complex.
274183
The correct pair(s) of the ambident nucleophiles is (are): (i) $\mathrm{AgCN} / \mathrm{KCN}$ (ii) $\mathrm{RCOOAg} / \mathrm{RCOOK}$ (iii) $\mathrm{AgNO}_{2} / \mathrm{KNO}_{2}$ (iv) $\mathrm{AgI} / \mathrm{KI}$
1 (ii) and (iii) only
2 (ii) only
3 (i) and (iii) only
4 (i) only
Explanation:
(C) : The nucleophile that can attack through two different sites are known as ambident nucleophiles $\mathrm{AgCN} / \mathrm{KCN}$ and $\mathrm{AgNO}_{2} / \mathrm{KNO}_{2}$ are both ambident nucleophile.
JEE Main 17.03.2021
COORDINATION COMPOUNDS
274192
Which among the following is the strongest ligand?
1 $\mathrm{CN}^{-}$
2 $\mathrm{NH}_{3}$
3 $\mathrm{CO}$
4 En
Explanation:
(C) : CO is strongest ligand among the following because both $\sigma$ and $\pi$ bond is formed due to synergic effect.
Karnataka-CET-2019
COORDINATION COMPOUNDS
274200
The ligand called $\pi$-acid is
1 $\mathrm{CO}$
2 $\mathrm{NH}_{3}$
3 $\mathrm{C}_{2} \mathrm{O}_{4}^{2-}$
4 ethylene diamine
Explanation:
(A) : An example of a $\pi$-acid ligand is carbon monoxide (CO). It is a good pi acceptor (lewis acid) due to empty pi orbital's and good sigma donor.
COMEDK-2019
COORDINATION COMPOUNDS
274206
Iron carbonyl, $\mathrm{Fe}(\mathrm{CO})_{5}$ is
1 tetranuclear
2 mononuclear
3 trinuclear
4 dinuclear
Explanation:
(B) : Iron carbonyl, $\left[\mathrm{Fe}(\mathrm{CO})_{5}\right]$ is mononuclear complex because in $\mathrm{Fe}(\mathrm{CO})_{5}$ only one central metal is involved in complex.
274183
The correct pair(s) of the ambident nucleophiles is (are): (i) $\mathrm{AgCN} / \mathrm{KCN}$ (ii) $\mathrm{RCOOAg} / \mathrm{RCOOK}$ (iii) $\mathrm{AgNO}_{2} / \mathrm{KNO}_{2}$ (iv) $\mathrm{AgI} / \mathrm{KI}$
1 (ii) and (iii) only
2 (ii) only
3 (i) and (iii) only
4 (i) only
Explanation:
(C) : The nucleophile that can attack through two different sites are known as ambident nucleophiles $\mathrm{AgCN} / \mathrm{KCN}$ and $\mathrm{AgNO}_{2} / \mathrm{KNO}_{2}$ are both ambident nucleophile.
JEE Main 17.03.2021
COORDINATION COMPOUNDS
274192
Which among the following is the strongest ligand?
1 $\mathrm{CN}^{-}$
2 $\mathrm{NH}_{3}$
3 $\mathrm{CO}$
4 En
Explanation:
(C) : CO is strongest ligand among the following because both $\sigma$ and $\pi$ bond is formed due to synergic effect.
Karnataka-CET-2019
COORDINATION COMPOUNDS
274200
The ligand called $\pi$-acid is
1 $\mathrm{CO}$
2 $\mathrm{NH}_{3}$
3 $\mathrm{C}_{2} \mathrm{O}_{4}^{2-}$
4 ethylene diamine
Explanation:
(A) : An example of a $\pi$-acid ligand is carbon monoxide (CO). It is a good pi acceptor (lewis acid) due to empty pi orbital's and good sigma donor.
COMEDK-2019
COORDINATION COMPOUNDS
274206
Iron carbonyl, $\mathrm{Fe}(\mathrm{CO})_{5}$ is
1 tetranuclear
2 mononuclear
3 trinuclear
4 dinuclear
Explanation:
(B) : Iron carbonyl, $\left[\mathrm{Fe}(\mathrm{CO})_{5}\right]$ is mononuclear complex because in $\mathrm{Fe}(\mathrm{CO})_{5}$ only one central metal is involved in complex.
274183
The correct pair(s) of the ambident nucleophiles is (are): (i) $\mathrm{AgCN} / \mathrm{KCN}$ (ii) $\mathrm{RCOOAg} / \mathrm{RCOOK}$ (iii) $\mathrm{AgNO}_{2} / \mathrm{KNO}_{2}$ (iv) $\mathrm{AgI} / \mathrm{KI}$
1 (ii) and (iii) only
2 (ii) only
3 (i) and (iii) only
4 (i) only
Explanation:
(C) : The nucleophile that can attack through two different sites are known as ambident nucleophiles $\mathrm{AgCN} / \mathrm{KCN}$ and $\mathrm{AgNO}_{2} / \mathrm{KNO}_{2}$ are both ambident nucleophile.
JEE Main 17.03.2021
COORDINATION COMPOUNDS
274192
Which among the following is the strongest ligand?
1 $\mathrm{CN}^{-}$
2 $\mathrm{NH}_{3}$
3 $\mathrm{CO}$
4 En
Explanation:
(C) : CO is strongest ligand among the following because both $\sigma$ and $\pi$ bond is formed due to synergic effect.
Karnataka-CET-2019
COORDINATION COMPOUNDS
274200
The ligand called $\pi$-acid is
1 $\mathrm{CO}$
2 $\mathrm{NH}_{3}$
3 $\mathrm{C}_{2} \mathrm{O}_{4}^{2-}$
4 ethylene diamine
Explanation:
(A) : An example of a $\pi$-acid ligand is carbon monoxide (CO). It is a good pi acceptor (lewis acid) due to empty pi orbital's and good sigma donor.
COMEDK-2019
COORDINATION COMPOUNDS
274206
Iron carbonyl, $\mathrm{Fe}(\mathrm{CO})_{5}$ is
1 tetranuclear
2 mononuclear
3 trinuclear
4 dinuclear
Explanation:
(B) : Iron carbonyl, $\left[\mathrm{Fe}(\mathrm{CO})_{5}\right]$ is mononuclear complex because in $\mathrm{Fe}(\mathrm{CO})_{5}$ only one central metal is involved in complex.
