Q. The Henry's law constant for the solubility $of{N}_2$ gas in water at $298K$ is $1.0\times {10}^5$ atm. The mole fraction of $N_2$ in air is $0.8$. The number of moles of $N_2$ from air dissolved in $10$ moles of water at $298K$ and $5$ atm pressure is:

1. $4.0\times {10}^{-4}$
2. $4.0\times {10}^{-5}$
3. $4.0\times {10}^{-6}$
4. $5.0\times {10}^{-4}$

Q. Given that the abundances of isotopes ${}^{54}Fe{,}^{56}Fe$ and ${}^{57}Fe$ are $5\%,90\%$ and $5\%$ respectively, the atomic mass of $Fe$ is:

1. $55.85$
2. $55.95$
3. $56.05$
4. $55.75$

Q. The correct statement(s) about the compound $H_{3}C\left(HO\right)HCCH=CHCH\left(OH\right)C{H}_3\left(X\right)$ are:

1. The total number of diastereomers possible for X is $3$.
2. The total number of stereoisomers possible for X is $6$.
3. If the stereochemistry about the double bond in X is trans, the number of enantiomers possible for X is $4.$
4. If the stereochemistry about the double bond in X is cis, the number of enantiomers possible for X is $2.$

Q. The $IUPAC$ name of the following compound is:

1. 4-Bromo-3-cyanophenol
2. 5-Bromo-3-hydroxybenzonitrile
3. 2-Cyano-4-hydroxybromobenzene
4. 2-Bromo-5-hydroxybenzonitrile

Q. Among cellulose, polyvinyl chloride, nylon and natural rubber, the polymer in which the following intermolecular force of attraction is weakest?

1. polyvinyl chloride
2. natural rubber
3. nylon
4. cellulose

Q. The term that corrects for the attractive forces present in a real gas in the van der Waals equation is:

1. $\frac{{an}^2}{V^2}$
2. $-\frac{{an}^2}{V^2}$
3. $-nb$
4. $nb$

Q. The reaction of $P_4$ with X leads selectively to $P_4{O}_6$. The X is:

1. A mixture of $O_2$ and $N_2$
2. Dry $O_2$
3. Moist $O_2$
4. $O_2$ in the presence of aqueous $NaOH$

Q. The correct acidity order of the following is:

1. $\left(III\right)>\left(IV\right)>\left(II\right)>\left(I\right)$
2. $\left(IV\right)>\left(III\right)>\left(I\right)>\left(II\right)$
3. $\left(II\right)>\left(III\right)>\left(IV\right)>\left(I\right)$
4. $\left(III\right)>\left(II\right)>\left(I\right)>\left(IV\right)$

Q. The compound(s) formed upon combustion of sodium metal in the excess air is(are):

1. $Na{O}_2$
2. $NaOH$
3. $N{a}_2{O}_2$
4. $N{a}_{2}O$

Q. Among the electrolytes $N{a}_{2}S{O}_4,CaC{l}_2,A{l}_2(S{O}_4{)}_3$ and $N{H}_{4}Cl,$ the most effective coagulating agent for $S{b}_2{S}_3$ solution is:

1. $N{a}_{2}S{O}_4$
2. $N{H}_{4}Cl$
3. $A{l}_2(S{O}_4{)}_3$
4. $CaC{l}_2$