Q. What type of bonding helps in stabilizing the $\alpha -$helix structure of proteins?

Q. For a reaction $A+B\to P$, the rate law is given by $r=k\left[A{]}^{\frac{1}{2}}\right[B{]}^2$.
(a) What is the order of this reaction?
(b) A first order reaction is found to have a rate constant $k=5.5\times {10}^{-14}{s}^{-1}$. Find the half life of the reaction.

Q. Of physisorption or chemisroption, which has a higher enthalpy of adsorption?

Q. Shanti, a domestic helper of Mrs. Anuradha, fainted while mopping the floor. Mrs. Anuradha immediately took her to the nearby hospital where she was diagnosed to be severely 'anaemic'. The doctor prescribed an iron rich diet and multivitamins supplement to her. Mr.s Anuradha supported her financially to get the medicines. After a month, Shanti was diagnosed to be normal.
(i) What values are displayed by Mrs. Anuradha?
(ii) Name the vitamin whose deficiency causes 'pernicious anaemia'.
(iii) Give an example of a water soluble vitamin

Q. Name two poisonous gases which can be prepared from chlorine gas.

Q. What are the products of hydrolysis of sugar?

Q. What is a biodegradable polymer? Given an example of biodegradable aliphatic polyester.

Q. How are interhalogen compounds formed? What general compositions can be assigned to them?

Q. What is meant by crystal field splitting energy? On the basis of crystal field theory, write the electronic configuration of $d^4$ in terms of $t_{2g}$ and $e_g$ in an octahedral field when
(i) ${\Delta }_0>P$
(ii) ${\Delta }_0<P$

Q. Rearrange the following compounds in the increasing order of their boiling points:
$C{H}_3-CHO,C{H}_3-C{H}_2-OH,C{H}_3-C{H}_2-C{H}_3$

Q. Account for the following:
(i) Conductivity of silicon increases on doping it with phosphorus

Q. Draw the structure of the following molecules:
(i) $XeO{F}_4$ (ii) $H_{3}P{O}_3$

Q. Calculate the emf of the following cell at ${25}^{\circ }C$.

Q. (i) What class of drug in Ranitidine?
(ii) If water contains dissolved $C{a}^{2+}$ ions, out of soaps and synthetic detergents which will you use for cleaning clothes?
(iii) Which of the following is an antiseptic?
$0.2$% phenol, $1$ % phenol

Q. Complete the following reactions:
(i) $C{H}_{3}C{H}_{2}N{H}_2+CHC{l}_3+alc.KOH\to$
(ii) $C_6{H}_5{N}_2^{+}C{l}^{-}\underset{roomTemp.}{\stackrel{water}{}}$

Q. The standard electrode potential $\left(E^{\circ }\right)$ for Daniel cell is $+1.1V$. Calculate $\Delta G^{\circ }$ for the reaction.
$Zn\left(s\right)+C{u}_{\left(aq\right)}^{2+}\to Z{n}_{\left(aq\right)}^{2+}+Cu\left(s\right)$
$(1F=96500C/mol)$

Q. What are the characteristics of the following colloids? Give one example of each
(i) Multimolecular colloids (ii) Lyophobic sols (iii) Emulsions

Q. Give reasons for the following.
(i) Ethyl iodide undergoes $S{N}^2$ reaction faster than ethyl bromide.
(ii) $(\pm )2-$ Butanol is optically inactive.
(iii) $C-X$ bond length in halobenzene is smaller than $C-X$ bond length in $C{H}_3-X$.

Q. Explain the mechanism of the following reaction:
$C{H}_3-C{H}_2-OH\underset{443K}{\stackrel{H^{+}}{}}C{H}_2=C{H}_2+H_2^{-}O$

Q. Define themoplastic and thermosetting polymers. Given one example of each.

Q. Write the structure of n-methylethanmine.

Q. Given reasons for the following:
(i) When R is an alkyl group, $R_{3}P=O$ exist but $R_{3}N=O$ doesn't.
(ii) $PbC{l}_4$ is more covalent than $PbC{l}_2$.
(iii) $N_2$ is much less reactive at room temperature.

Q. Write the equations involved in the following reactions:
(i) Reimer - Tiemann reaction
(ii) Williamson ether synthesis

Q. For the complex $[NiC{l}_4{]}^{2-}$, write
(i) the IUPAC name (ii) the hybridization type (iii) the shape of the complex.
(Atomic no. of $Ni=28$)

Q. The rate of a reaction becomes four times when the temperature changes from $293K$ to $313K$. Calculate the energy of activation $\left(E_2\right)$ of the reaction assuming that it does not change with temperature.
$[R=8.314J/Kmo{l}^{-1},\log 4=0.6021]$

Q. Name the method used for refining of copper metal.

Q. Write the IUPAC name of the following compound.

Q. Aluminium crystallizes in an FCC structure. Atomic radius of the metal is $125pm$. What is the length of the side of the unit cell of the metal?

Q. (a) Name the method used for removing gangue from sulphide ores.
(b) How is wrought iron different from steel?

Q. (a) State Raoult's law for a solution containing volatile components. How does Raoult's law become a special case of Henry's law?
(b) $1.00g$ of a non-electrolyte solute dissolved in $50g$ of benzene lowered the freezing point of benzene by $0.40K$. Find the molar mass of the solute. ($K_f$ for $benzene=5.12Kkg/mol)$