1. The \(\text{E}^\circ\) value for the \(\text{Mn}^{3+}\,/\,\text{Mn}^{2+}\) couple is more positive than that of \(\text{Cr}^{3+}\,/\,\text{Cr}^{2+}\) or \(\text{Fe}^{3+}\,/\,\text{Fe}^{2+}\) due to change of:

(1).\(d^4\) to \(d^5\) configuration

(2). \(d^3\) to \(d^5\) configuration

(3). \(d^5\) to \(d^4\) configuration

(4). \(d^5\) to \(d^2\) configuration

2. Arrange the following elements in increasing order of first ionization enthalpy:
Li, Be, B, N
Choose the correct answer from the options given below:

(1).Li < Be < C < B < N

(2). Li < Be < N < B < C

(3). Li < Be < B < C < N

(4). Li < B < Be < C < N

3. Match List-I with List-II:

Choose the correct answer from the options given below:

(1).A-III, B-IV, C-II, D-I

(2). A-III, B-IV, C-I, D-II

(3). A-I, B-IV, C-II, D-III

(4). A-IV, B-II, C-II, D-I

4. Identify the correct answer

(1).Dipole moment of \(\text{NF}_3\) is greater than that of \(\text{NH}_3\)

(2). Three canonical forms can be drawn from \(\text{CO}^{2-}_3\) ion

(3). Three resonace structures can be drawn for ozone

(4). \(\text{BF}_3\) has non-zero dipole moment

5. Given below are two statements :
Statement I : A hypothetical diatomic molecule with bond order zero is quite stable.
Statement II : As bond order increases, the bond length increases.
In the light of the above statements, choose the most appropriate answer from the options given below :

(1).Statement I is false but Statement II is true

(2). Both Statement I and Statement II are true

(3). Both Statement I and Statement II are false

(4). Statement I is true but Statement II is false

6. Among the given compounds I-III, the correct order of bond dissociation energy of C-H bond marked with * is :

(1).II > III > I

(2). II > I > III

(3). I > II > III

(4). III > II > I

7. Identify the correct orders against the property mentioned
A.\(H_2O\, >\, NH_3 \,> \,CHCI_3\, -\, \text{dipole moment}\)
B. \(XeF_4\, >\, XeO_3\, >\, XeF_2 \,-\, \text{number of lone pairs on central atom}\)
C. \(O-H \,>\, C-H \,>\, N-O \,-\, \text{bond length}\)
D. \(N_2 \,>\, O_2 \,>\, H_2\, -\, \text{bond enthalpy}\)
Choose the correct answer fromthe options given below:

(1).B, C only

(2). A, D only

(3). B, D only

(4). A, C only