Q. CO(g) and $H_2$(g) react to give different products in the presence of different catalyst. Which ability of the catalyst is shown by these reactions?

Q. Give reasons for the following.
Elevation of boiling point of $1$M KCl solution is nearly double than that of $1$M sugar solution.

Q. Complete and balance the following chemical equation :

Q. Write the coordination number and oxidation state of Platinum in the complex $\left[Pt\right(en{)}_{2}C{l}_2]$.

Q. Account for the following.
Aromatic carboxylic acids do not undergo Friedel-Crafts reaction.

Q. Identify the chiral molecule in the following pair.

Q. $\left(A\right),\left(B\right)$ and $\left(C\right)$ are three non-cyclic functional isomers of a carbonyl compound with molecular formula $C_4{H}_{8}O$. Isomers $\left(A\right)$ and $\left(C\right)$ give positive Tollens' test whereas isomer$\left(B\right)$ does not give Tollens' test but gives protection Iodoform test. Isomers $\left(A\right)$ and $\left(B\right)$ on reduction with $Zn\left(Hg\right)/conc$. $HCl$ give the same product $\left(D\right)$.

Q. Give reasons for the following.
Measurement of osmotic pressure method is preferred for the determination of molar masses of macromolecules such as proteins and polymers.

Q. What type of isomerism is exhibited by the complex $\left[Co\right(N{H}_3{)}_{5}Cl]S{O}_4$?

Q. Write the hybridisation and number of unpaired electrons in the complex $[Co{F}_6{]}^{3-}$. (Atomic No. of Co$=27$).

Q. Write the structure of the alkene formed by dehydrohalogenation of $1$-bromo-$1$-methylcyclohexane with alcoholic KOH.

Q. Give reasons for the following.
Aquatic animals are more comfortable in cold water than in warm water.

Q. Give reasons.
$E^o$ value for $M{n}^{3+}/M{n}^{2+}$ couple is much more positive than that for $F{e}^{3+}/F{e}^{2+}$.

Q. Write the IUPAC name of the following.

Q. Calculate the freezing point of a solution containing $60g$ of glucose (Molar mass $=180gmo{l}^{-1}$) in $250g$ of water.

Q. An element 'X' (At. mass $=40$g $mo{l}^{-1}$) having f.c.c structure, has unit cell edge length of $400$ pm. Calculate the density of 'X' and the number of unit cells in $4$g of 'X'. $(N_A=6.022\times {10}^{23}mo{l}^{-1})$.

Q. Analysis shows that FeO has a non-stoichiometric composition with formula $F{e}_{0.95}O$. Give reason.

Q. Give reasons.
Iron has higher enthalpy of atomization that that of copper.

Q. How do you convert the following?

Q. Complete and balance the following chemical equation.
$F{e}^{2+}+Mn{O}_4^{-}+H^{+}\to$

Q. Account for the following.
p$K_a$ value of $4$-nitrobenzoic acid is lower than that of benzoic acid.

Q. Out of chlorobenzene and benzyl chloride, which one gets easily hydrolysed by aqueous NaOH and why?

Q. $\left(A\right),\left(B\right)$ and $\left(C\right)$ are three non-cyclic functional isomers of a carbonyl compound with molecular formula $C_4{H}_{8}O$. Isomers $\left(A\right)$ and $\left(C\right)$ give positive Tollen's test whereas isomer $\left(B\right)$ does not give Tollen's test but gives positive Iodoform test. Isomers $\left(A\right)$ and $\left(B\right)$ on reduction with $Zn\left(Hg\right)/conc$. $HCl$ give the same product $\left(D\right)$.

Q.

Q. Write the structure of the product when chlorobenzene is treated with methyl chloride in the presence of sodium metal and dry ether.

Q. How do you convert the following?
Ethanal to Propanone.

Q. Identify the chiral molecule in the following pair.

Q. For the reaction $2N_2{O}_5\left(g\right)\to 4N{O}_2\left(g\right)+O_2\left(g\right)$, the rate of formation of $N{O}_2$(g) is $2.8\times {10}^{-3}M{s}^{-1}$. Calculate the rate of disappearance of $N_2{O}_5\left(g\right)$.

Q. Give reasons.
$S{c}^{3+}$ is colourless in aqueous solution whereas $T{i}^{3+}$ is coloured.

Q. Write the formula of the following coordination compound.
Iron(III) hexacyanoferrate(II).