Sidgwick's Electronic Concept

Q. In $F{e}_2(CO{)}_9$ , the EAN of Fe is

1. 72
2. 36
3. 18
4. 54

Q. Ethylene diaminetetraacetate $\left(EDTA\right)$ ion is :

1. Tridentate ligand with three $"N"$ donor atoms.
2. Hexadentate ligand with four $"O"$ and two $"N"$ donor atoms.
3. Unidentate ligand
4. Bidentate ligand with two $"N"$ donor atoms.

Q. For an electrophilic substitution reaction, the presence of a halogen atom in the benzene ring _______.

1. Directs the incoming electrophile to meta position by increasing the charge density relative to ortho and para position.
   
2. Deactivates the ring by resonance.
   
3. Deactivates the ring by inductive effect.
   
4. Increases the charge density at ortho and para position relative to meta position by resonance.
   

Q. The effective atomic number of Hg(At. No. 80) in the complex $K_2\left[Hg{I}_4\right]$ is

1. 82
2. 88
3. 86
4. 84

Q. In the complex $Fe(CO{)}_x$, the value of x is

1. 3
2. 4
3. 5
4. 6

Q. In $K_4\left[Fe\right(CN{)}_6]$, the EAN of Fe is

1. 18
2. 54
3. 36
4. 26

Q.

The effective atomic number of central Cu (At. No. 29) metal in $\left[Cu\right(N{H}_3{)}_4]S{O}_4$ is

1. 29

2. 30

3. 35

4. 36

Q. Which of the following terms is/are used to indicate the number of individual ligands that include a numerical prefix in the name of a coordination compound?

1. tetra
2. penta
3. tris
4. tetrakis

Q.

1. True
2. False

Q. In the complex $Fe(CO{)}_x$, the value of x is

1. 3
2. 4
3. 5
4. 6

Q. Assertion :The $d_{c-o}$ in bridging carbonyl group is longer than that of terminal carbonyl group. Reason: With an increase in the extent of synergic bonding, the $C-O$ bond length increases.

1. Statement-1 is true, statement-2 is true and statement-2 is correct explanation for statement-1.
2. Statement-1 is true, statement-2 is true and statement-2 is NOT the correct explanation for statement-1
3. Statement-1 is true, statement-2 is false.
4. Statement-1 is false, statement-2 is true.

Q. Calculate the percentage composition of iron in ferric oxide, $F{e}_2{O}_3$.

1. 70%
2. 50%
3. 40%
4. 60%

Q. Which of the following is correct value of n in $Cr(CO{)}_n$?

1. 2
2. 6
3. 4
4. 0

Q. Ethylene diaminetetraacetate $\left(EDTA\right)$ ion is :

1. Tridentate ligand with three $"N"$ donor atoms.
2. Hexadentate ligand with four $"O"$ and two $"N"$ donor atoms.
3. Unidentate ligand
4. Bidentate ligand with two $"N"$ donor atoms.

Q. The total number of neutrons in dipositive zinc ions with mass number $70$ is:

1. $40$
2. $34$
3. $36$
4. $38$

Q. If oxide ions are arranged in hcp and the aluminium ions occupy two thirds of octahedral voids. What will be the formula of the compound?

1. $Al{O}_3$
2. $A{l}_2{O}_3$
3. $(A{l}_2{O}_3{)}_2$
4. $A{l}_3{O}_4$

Q. The EAN of copper in $\left[Cu\right(N{H}_3{)}_4{]}^{2+}$ is

1. 36
2. 34
3. 37
4. 35

Q. $\left[Cu\right(N{H}_3{)}_4{]}^{2+}$ and $\left[Cu\right(CN{)}_4{]}^{2-}$ are labile complexes.
If true 1 else 0.

1. 1

Q. The element which has highest first iozination energy in the periodic table is:

1. $H$
2. $Rn$
3. $F$
4. $He$

Q. Which of the following is correct value of n in $Cr(CO{)}_n$?

1. 2
2. 4
3. 6
4. \N

Q. In $F{e}_2(CO{)}_9$ , the EAN of Fe is

1. 72
2. 36
3. 18
4. 54

Q. In $K_4\left[Fe\right(CN{)}_6]$, the EAN of Fe is

1. 18
2. 54
3. 36
4. 26

Q.

The effective atomic number of central Cu (At. No. 29) metal in $\left[Cu\right(N{H}_3{)}_4]S{O}_4$ is

1. 29

2. 30

3. 35

4. 36

Q. The effective atomic number of Hg(At. No. 80) in the complex $K_2\left[Hg{I}_4\right]$ is

1. 86
2. 84
3. 82
4. 88

Q. The formal charges on $B$ and $F$ are respectively.

1. $-1,0$
2. $-1,-1$
3. $0,-1$
4. $-1,+1$

Q. If EAN of central metal cation $M^{2+}$ in a non-chelating complex is $36$ and atomic no. of metal $M$ is $26$, then the number of monodentate ligand in this complex are

1. $5$
2. $4$
3. $6$
4. $3$

Q. Which of the following can not classified as an ionic compound based on basic bonding concepts?

1. $AlC{l}_3$
2. $PC{l}_3$
3. $KCl$
4. $CuC{l}_3$

Q. The ionization energy of hydrogen is $13.6eV$. The first ionization energy of $He$ is $24.6eV$. Calculate the energy given out when $H{e}^{2+}$ nucleus combines with two electrons to form a helium atom in ground state.

1. $68.2eV$
2. $38.2eV$
3. $79eV$
4. $51.8eV$