Q. Due to hectic and busy schedule, Mr. Angad made his life full of tensions and anxiety. He started taking sleeping pills to overcome the depression without consulting the doctor. Mr. Deepak, a close friend of Mr. Angad advised him to stop taking sleeping pills and suggested to change his life lifestyle by doing yoga, meditation and some physical exercise. Mr. Angad followed his friends advice and after few days he started feeling better. After reading the above passage, answer the following.
(i) What are the values (at least two) displayed by Mr. Deepak?
(ii) Why is it not advisable to take sleeping pills without consulting doctor?
(iii) What are tranquilisers? Give two examples.

Q. $Pb(N{O}_3{)}_2$ on heating gives a brown gas which undergoes dimerisation on cooling. Identify the gas.

Q. Give reasons for the following:
(i) Aniline does not undergo Friedal- Crafts reaction.
(ii) $(C{H}_3{)}_{2}NH$ is more basic than $(C{H}_3{)}_{3}N$ in an aqueous solution.
(iii) Primary amines have higher boiling point than tertiary amines.

Q. (a) Write the chemical reaction involved in Wolff-Kishner reduction.
(b) Arrange the following in the increasing order of their reactivity towards nucleophilic addition reaction:
$C_6{H}_{5}COC{H}_3,C{H}_3-CHO,C{H}_{3}COC{H}_3$
(c) Why carboxylic acid does not give reactions of carbonyl group?
(d) Write the product in the following reaction
$C{H}_{3}C{H}_{2}CH=CH-C{H}_{2}CN\underset{2.H_{2}O}{\overset{1.(i-Bu{)}_{2}AlH}{\to }}$
(e) A and B are two functional isomers of compound $C_3{H}_{6}O$.On heating with NaOH and $I_2$, isomer B forms yellow precipitate of iodoform whereas isomer A does not form any precipitate. Write the formulae of A and B.

Q. What happens when:
(i) $S{O}_2$ gas is passed through an aqueous solution of $F{e}^{+3}$ salt?
(ii) $Xe{F}_4$ reacts with $Sb{F}_5$?

Q. The elements of 3d transition series are given as:Sc, Ti, V, Cr, Mn, Fe, Co
Answer the following:
(i) Write the element which shows maximum number of oxidation states. Give reason.

Q. What is the reason for the stability of colloidal sols?

Q. (a) Write the structures of A and B in the following reactions:
(i)$C{H}_{3}COCl\stackrel{H_2,Pd-BaS{O}_4}{\to }A\stackrel{H_{2}N-OH}{\to }B$
(ii)$C{H}_{3}MgBR\underset{2.H_2{O}^{+}}{\overset{1.C{O}_2}{\to }}A\stackrel{PC{l}_5}{\to }B$
(B) Distinguish between:

Q. An element crystallises in a bcc lattice with cell edge of $500$ pm. The density of the element is $7.5$g $c{m}^{-3}$. How many atoms are present in $300$ g of the element?

Q. Give an example each of a molecular solid and an ionic solid?

Q. Write the chemical equations involved in the following reactions:
(i) Hoffmann-bromamide degradation reaction.
(ii) Carbylamine reaction.

Q. (A) Account for the following:
(i) $Mn$ shows the highest oxidation state of +7 with oxygen but with fluorine, it shows oxidation state of +4.
(ii) $C{r}^{2+}$ is a strong reducing agent.
(iii) $C{u}^{2+}$ salts are coloured, while $Z{n}^{2+}$ salts are white.
(B) Complete the following equations:
(i) $2Mn{O}_2+4KOH+O_2\stackrel{\Delta }{\to }$
(ii) $C{r}_2{O}_7^{2-}+14H^{+}+6e^{-}\to$

Q. How do you convert:
(i) Chlorobenzene to biphenyl
(ii) Propene to 1-iodopropane
(iii) 2-bromobutane to but-2-ene

Q. (a) For the complex $\left[Fe\right(H_{2}O{)}_6{]}^{+3}$, write the hybridisation, magnetic character and spin of the complex. (At. number : Fe = 26)
(b) Draw one of the geometrical isomers of the complex $\left[Pt\right(en{)}_{2}C{l}_2{]}^{+2}$ which is optically inactive.

Q. Give reasons:
(i) Name the method of refining of nickel.
(ii) What is the role of cryolite in the extraction of aluminium?
(iii) What is the role of limestone in the extraction of iron from its oxides?

Q. (a) The conductivity of 0.001 mol L${}^{-1}$ solution of $C{H}_{3}COOH$ is 3.905$\times {10}^{-5}$ Scm${}^{-1}$. Calculate its molar conductivity and degree of dissociation.
Given: $\left(H^{+}\right)$= 349.6 S $c{m}^{2}mo{l}^{-1}$ and $\left(C{H}_{3}CO{O}^{-}\right)$= 40.9S $c{m}^{2}mo{l}^{-1}$.
(b) Define electro chemical cell. What happens if external potential applied becomes greater than $E_{cell}$ of electro chemical cell?

Q. Write the structures of the following:
(i) $Br{F}_3$.
(ii) $Xe{F}_4$.

Q. For the first order thermal decomposition reaction, the following data were obtained:
$C_2{H}_{5}C{l}_{\left(g\right)}\stackrel{hv}{\to }{C}_2{H}_{4\left(g\right)}+HC{l}_{\left(g\right)}$
Time (sec) Total pressure (atm)
0 0.30
300 0.50
Calculate the rate constant.(Given: log 2 = 0.301, log3 = 0.4771, log 4 = 0.6021)

Q. Write the IUPAC name of the given compound :

Q. Write the major products(s) in the following.

Q. Give reasons:
(i) $S{O}_2$ is reducing while $Te{O}_2$ is an oxidising agent.
(ii) Nitrogen does not form pentahalide.
(iii) $ICl$ is more reactive than $I_2$.

Q. For a reaction: $H_2+C{l}_2\stackrel{hv}{\to }2HCl$
Rate $=k$
(i) Write the order and molecularity of this reaction.
(ii) Write the unit of $k$.

Q. Calculate the boiling point of solution when 4g of $MgS{O}_4(M=120gmo{l}^{-1})$ was dissolved in 100g of water, assuming $MgS{O}_4$ undergoes complete ionization.

Q. When a coordination compound $CoC{l}_3.6N{H}_3$ is mixed with $AgN{O}_3$, 3moles ofAgCl are precipitated per mole of the compound. Write :
(i) structural formula of the complex.
(ii) IUPAC name of the complex.

Q. (i) Write the structural difference between starch and cellulose?
(ii) What type of linkage is present in nucleic acids?
(iii) Give one example each for fibrous protein and globular protein?

Q. Define the following terms:
(i) Lyophilic colloid
(ii) Zeta potential
(iii) Associated colloids

Q. Write the structure of an isomer of compound $C_4{H}_{9}Br$, which is most reactive towards $S_{N}1$ reaction.

Q. Write the final product(s) in each of the following reactions:

Q. (i) What is the role of sulphur in the vulcanisation of rubber?
(ii) Identify the monomers in the given polymer.
(iii) Arrange the following polymers in the decreasing order of their intermolecular forces: Terylene, Polythene, Neoprene.

Q. (i) Gas (A) is more soluble in water than gas (B) at the same temperature. Which one of the two gases will have the higher value of $K_H$ (Henry's constant) and why?