Q. Assuming ideal behaviour, the enthalpy and volume of mixing of two liquids, respectively, are:

1. -ve and zero
2. -ve and -ve
3. zero and zero
4. +ve and zero

Q. When the size of a spherical nanoparticle decreases from $\text{30 nm}$ to $\text{10 nm}$. The ratio surface area/volume becomes:

1. $1/3$ of the original
2. $3$ times the original
3. $1/9$ of the original
4. $9$ times the original

Q. The rate of gas phase chemical reactions generally increases rapidly with rise in temperature. This is mainly because:

1. the collision frequency increases with temperature
2. the fraction of molecules having energy in excess of the activation energy increases with temperature
3. the average kinetic energy of molecules increases with temperature
4. the activation energy decreases with temperature

Q. At $298K$, the ratio of osmotic pressures of two solutions of a substance with concentrations of $0.01M$ and $0.001M$ respectively, is:

1. $1$
2. $100$
3. $1000$
4. $10$

Q. For a process to occur spontaneously:

1. only the entropy of the system must increase
2. either the entropy of the system or that of the surroundings must increase
3. the total entropy of the system and the surroundings must increase
4. only the entropy of the surroundings must increase

Q. Two possible stereoisomers of the above molecule are:

1. enantiomers
2. diastereomers
3. conformers
4. rotamers

Q. Among i-iv, the compound that does not undergo polymerization under radical initiation is:

1. i
2. ii
3. iii
4. iv

Q. Extraction of silver is achieved by initial complexation of the ore (Argentite) with $X$ followed by reduction with $Y.X$ and $Y$, respectively, are:

1. $C{l}^{-}$ and $Zn$
2. $C{N}^{-}$ and $Cu$
3. $B{r}^{-}$ and $Zn$
4. $C{N}^{-}$ and $Zn$

Q. The hybridizations of $Ni(CO{)}_4$ and $Cr(H_{2}O{)}_6^{2+}$, respectively, are:

1. $ds{p}^2$ and $d^{2}s{p}^3$
2. $s{p}^3$ and $d^{3}s{p}^2$
3. $s{p}^3$ and $d^{2}s{p}^3$
4. $ds{p}^2$ and $s{p}^3{d}^2$

Q. The major product of the given reaction is:

1. 
   
2. 
   
3. 
   
4.