Q. In dilute aqueous $H_2{O}_4$, the complex diaquodioxalatoferrate (II) is oxidized by $Mn{O}_4^{-}$. For this reaction, the ratio of the rate of change of $\left[H^{+}\right]$ to the rate of change of $\left[Mn{O}_4^{-}\right]$ is:

Q. Under hydrolytic conditions, the compounds used for preparation of linear polymer and for chain termination respectively are:

1. $C{H}_{3}SiC{l}_3$ and $Si(C{H}_3{)}_4$
2. $(C{H}_3{)}_{2}SiC{l}_2$ and $(C{H}_3{)}_{3}SiCl$
3. $(C{H}_3{)}_{3}SiC{l}_2$ and $C{H}_{3}SiC{l}_2$
4. $SiC{l}_4$ and $(C{H}_3{)}_{3}SiCl$

Q. A closed vessel with rigid walls contains 1 mol of ${}_{92}^{238}U$ and 1 mol of air at 298 K. Considering complete decay of ${}_{92}^{238}U$ to ${}_{82}^{206}Pb$, the ratio of the final pressure to the initial pressure of the system at 298 K is:

Q. In the complex acetylbromidodicarbonylbis(triethylphosphine) iron (II), the number of Fe-C bond(S) is:

Q. The pair(s) of ions where both the ions are precipitated upon passing H2SH2S gas in presence of dilute $HCl$, is (are):

1. $B{a}^{2+},Z{n}^{2+}$
2. $B{i}^{3+},K{e}^{2+}$
3. $H{g}^{2+},B{i}^{2+}$
4. $C{u}^{2+},P{b}^{2+}$

Q. The molar conductivity of a solution of a weak acid HX (0.10 M) is 10 times smaller than the molar conductivity of a solution of of weak acid HY (0.1 M). If $({\lambda }_{x-}^0\approx {\lambda }_{y-}^0)$, the difference in their $p{K}_a$ values, $p{K}_a\left(HX\right)-p{K}_a\left(HY\right)$, is:

Q. From the above reactions, the number of reaction(s) that produce(s) benzaldehyde is

Q. When $O_2$ is absorbed on a metallic surface, electron transfer occurs from the metal to $O_2$. The true statement(s) regarding this adsorption is(are):

1. $O_2$ is physisorbed
2. heat is released
3. occupancy of ${\pi }_{2p}^{\ast }$ of $O_2$ is increased
4. bond length of $O_2$ is increased

Q. Three moles of $B_2{H}_6$ are completely reacted with methanol. The number of moles of boron containing product formed is :

Q. The number of hydroxyl group(s) in Q is: