Q. Among the following compounds, the most acidic is:

1. p-nitrophenol
2. p-hydroxybenzoic acid
3. o-hydroxybenzoic acid
4. p-toluic acid

Q. $AgN{O}_3$ (aq) was added to an aqueous $KCl$ solution gradually and the conductivity of the solution was measured. The plot of conductance $\left(\Lambda \right)$ versus the volume of $AgN{O}_3$ is :

1. (Q)
2. (P)
3. (S)
4. (R)

Q. The major product of the above reaction is:

1. 
   
2. 
   
3. 
   
4. 
   

Q. Bombardment of aluminum by $\alpha$-particle leads to its artificial disintegration in two ways, (i) and (ii) as shown in the given figure. Products $X,Y$ and $Z$ respectively are:

1. proton, positron, neutron
2. positron, proton, neutron
3. proton, neutron, positron
4. neutron, positron, proton

Q. Geometrical shapes of the complexes formed by the reaction of $N{i}^{2+}$ with $C{l}^{-},C{N}^{-}$ and $H_{2}O$, respectively, are:

1. tetrahedral, square planar and octahedral
2. octahedral, tetrahedral and square planar
3. square planar, tetrahedral and octahedral
4. octahedral, square planar and octahedral

Q. Extra very pure $N_2$ can be obtained by heating:

1. $Ba(N_3{)}_2$
2. $(N{H}_4{)}_{2}C{r}_2{O}_7$
3. $N{H}_3$ with $CuO$
4. $N{H}_{4}N{O}_3$

Q. Dissolving 120 gm of urea (mol. wt. 60) in 1000 gm of water gave a solution of density 1.15 gm/ml. The molarity of the solution is:

1. $1.78M$
2. $2.00M$
3. $2.22M$
4. $2.05M$