Q. Following reaction takes place in the cell:
$Zn\left(s\right)+A{g}_{2}O\left(s\right)+H_{2}O\left(l\right)\to Z{n}^{2+}\left(aq\right)+2Ag\left(s\right)+2O{H}^{-}\left(aq\right)$
Calculate ${\Delta }_r{G}^0$ of the reaction.
[Given: $E_{\left(Z{n}^{2+}/Zn\right)}^0=-0.76V$,
$E_{\left(A{g}^{+}/Ag\right)}^o=0.80V,1F=96,500Cmo{l}^{-1}]$

Q. How can you determine limiting molar conductivity, $\left({\bigwedge }_m^0\right)$ for strong electrolyte and weak electrolyte?

Q. Define the following with a suitable example, of each:
(a) Cogulation
(b) Multimolecular colloid
(c) Gel

Q. Out of starch and ferric hydroxide sol. which one can easily be coagulated and why?

Q. What is observed when an emulsion is centrifuged?

Q. What is the role of promoters and poisons in catalysis?

Q. An element crystallises in bcc lattice with a cell edge of $3\times {10}^{-8}cm$. The density of the element is $6.89gc{m}^{-3}$. Calculate the molar mass of the element. $(N_A=6.022\times {10}^{23}mo{l}^{-1})$

Q. What type of semiconductor is obtained when
(i) Ge is doped with In?
(ii) Se is doped with P?

Q. A solution $0.1M$ of $N{a}_{2}S{O}_4$ is dissolved to the extent of $95\%$. What would be its osmotic pressure at ${27}^{o}C$? $(R=0.0821Latm{K}^{-1}mo{l}^{-1})$

Q. Write down the reactions taking place in blast furnace related to the metallurgy of iron in the temperature range $500K-800K$. What is the role of limestone in the metallurgy of iron?

Q. What happens when silver is leached with $NaCN$ in the presence of air?

Q. What happens when copper matte is charged into silica lined converter and hot air blast is blown?

Q. What happens when $NaCN$ is added in ore containing $PbS$ and $ZnS$ during concentration by froth floatation method?

Q. Given reasons for the following:
Dioxygen is a gas but sulphur a solid.

Q. Given reasons for the following:
NO (g) released by jet aeroplanes is slowly depleting the ozone layer.

Q. Give reasons for the following:
Interhalogens are more reactive than pure halogens.

Q. Write the structures of monomers used to obtain the following polymers:
(a) Neoprene
(b) PHBV
(c) Bakelite

Q. Arrange the following polymers in decreasing order of their intermolecular forces:
Bakelite, Polythene, Buna-S, Nylon-6, 6

Q. Write the monomers of the following polymer:

Q. What is the structural difference between high density polythene (HDP) and low density polythene (LDP)?

Q. What are metal hydroxide better alternatives than sodium hydrogen carbonate in antacids?

Q. Why is aspirin used in the prevention of heart-attacks?

Q. Give one chemical test as an evidence to show that $\left[Co\right(N{H}_3{)}_{5}Cl]S{O}_4$ and $\left[Co\right(N{H}_3{)}_5\left(S{O}_4\right)]Cl$ are ionisation isomers.

Q. $[NiC{l}_4{]}^{2-}$ is paramagnetic while $Ni\left(CO{)}_4\right]$ diamagnetic though both are tetrahedral. Why? (Atomic no. of $Ni=28$)

Q. Write the electronic configuration of $Fe\left(III\right)$ on the basis of crystal field theory when it forms an octahedral complex in the presence of (i) strong field ligand, and (ii) weak field ligand.

Q. Define the following terms with a suitable example of each:
(a) Anomers
(b) Essential amino acids
(c) Denturation of protein

Q. Define order of reaction. How does order of a reaction differ from molecularity for a complex reaction?

Q. A first order reaction is 50% complete in 25 minutes. Calculate the time for 80% completion of the reaction.

Q. The decomposition of a hydrocarbon has value of rate constant as $2.5\times {10}^4{s}^{-1}$ at ${27}^{o}C$. At what temperature would rate constant be $7.5\times {10}^4{s}^{-1}$ if energy of activation is $19.147\times {10}^{3}Jmo{l}^{-1}$?

Q. Write condition under which a bimolecular reaction is kinetically first order. Given an example of such a reaction.
(Given: $\log 2=0.3010,\log 3=0.4771,\log 5=0.6990$)