A solution of sucrose (molar mass = 342 g mol^–1) has been prepared by dissolving 68.5 g of sucrose in 1000 g of water. The freezing point of the solution obtained will be: 
(k_f for water = 1.86 K kg mol^–1)
1. –0.372 ^oC
2. –0.520 ^oC
3. +0.372 ^oC
4. –0.570 ^oC

A compound that has higher hydration enthalpy than the lattice enthalpy is: 

1. ${\mathrm{CaSO}}_4$

2. ${\mathrm{BeSO}}_4$

3. ${\mathrm{BaSO}}_4$

4. ${\mathrm{SrSO}}_4$

Which of the following ions has the electronic configuration [Ar] 3d⁶?
(At. no :Mn = 25, Fe= 26, Co= 27, Ni = 28)

1. $N{i}^{3+}$

2. $M{n}^{3+}$

3. $F{e}^{3+}$

4. $C{o}^{3+}$

An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to:

Crystal field stabilization energy for high spin d⁴ octahedral complex is:

1. -1.8 ${∆}_0$

2. -1.6 ${∆}_0$+P

3. -1.2 ${∆}_0$

4. -0.6 ${∆}_0$

Which of the following represents the oxidation states of phosphorus in H₄P₂O₅, H₄P₂O₆, H₄P₂O₇, respectively?

The incorrect statement among the following regarding the primary amine is:

The correct order of increasing bond angles in the following species is:

1. \(C l_{2} O < C l O_{2} < C l O_{2}^{-}\)

2. \(C l O_{2} < C l_{2} O < C l O_{2}^{-}\)

3. \(C l_{2} O < C l O_{2}^{-} < C l O_{2}\)

4. \(C l O_{2}^{-} < C l_{2} O < C l O_{2}\)

The compound that is most susceptible to a nucleophilic attack in the carbonyl group is:

1. ${\mathrm{CH}}_3{\mathrm{COOCH}}_3$

2. ${\mathrm{CH}}_3{\mathrm{CONH}}_2$

3. ${\mathrm{CH}}_3{\mathrm{COOCOCH}}_3$

4. ${\mathrm{CH}}_3\mathrm{COCl}$

25.3 g of sodium carbonate, Na₂CO₃, is dissolved in enough water to make 250 mL of a solution. If sodium carbonate completely dissociates, the molar concentrations of sodium ion, Na⁺ and carbonate ion, $C{O}_3^{2-}$are respectively:
(molar mass of Na₂CO₃ = 106g mol^-1)

1. 0.955 M and 1.910 M
2. 1.910 M and 0.955 M
3. 1.90 M and 1.910 M
4. 0.477 M and 0.477 M