Using the Ellingham diagram,
(A) Predict the conditions under which
(i) Aluminium might be expected to reduce magnesia.
(ii) Magnesium could reduce alumina.
(B) it is possible to reduce Fe₂O₃ by coke at a temperature around 1200K

Give the limitations of Ellingham diagram.

Give the balanced equation for the reaction between chlorine with cold NaOH and hot NaOH.

Write the postulates of Werner’s theory.

On the basis of VB theory explain the nature of bonding in [Co(C₂O₄)₃]^3-

Differentiate crystalline solids and amorphous solids.

Calculate the percentage efficiency of packing in case of body centered cubic crystal.

What is an elementary reaction? Give the differences between order and molecularity of a reaction.

Discuss the Lowry – Bronsted concept of acids and bases.

State Kohlrausch Law. How is it useful to determine the molar conductivity of weak electrolyte at infinite dilution.

What is the difference between homogenous and hetrogenous catalysis?

Describe adsorption theory of catalysis

Predict the product A,B,X and Y in the following sequence of reaction

3,3 – dimethylbutan -2-ol on treatment with conc. H ₂SO₄ to give tetramethyl ethylene as a major product. Suggest a suitable mechanism.

Identify A, B, C and D
\(\text { ethanoic acid } \stackrel{\mathrm{SOCl}_{2}}{\longrightarrow} \mathrm{A} \stackrel{\mathrm{Pd} / \mathrm{BaSO}_{4}}{\longrightarrow} \mathrm{B} \stackrel{\mathrm{NaOH}}{\longrightarrow} \mathrm{C} \stackrel {\longrightarrow}{\triangle} \mathrm{D}\)

An alkene (A) on ozonolysis gives propanone and aldehyde (B). When (B) is oxidised (C) is obtained. (C) is treated with Br₂/P gives (D) which on hydrolysis gives (E). When propanone is treated with HCN followed by hydrolysis gives (E). Identify A, B, C, D and E.

Predict A,B,C and D for the following reaction

Identify A to E in the following sequence of reactions
   
 \(\overset { {CH_3} {CL} }{ \underset { {AlCl}_3 }{ \longrightarrow } }\) A \(\overset { {HNO_3}/ {H_2So_4} }{ \underset { {} }{ \longrightarrow } }\)  B \(\overset { {Sn} /{HCL} }{ \underset {{} }{ \longrightarrow } }\)  (C) \(\overset { {NaNo_2}/ {HCL} }{ \underset { {O^o}C }{ \longrightarrow } }\)  D \(\overset { {CuCN} }{ \underset { {}}{ \longrightarrow } }\) E

What are bio degradable polymers? Give examples.

How is terylene prepared?

Explain the preparation, properties, structure and uses of Diborane.

Complete the following reactions
(i) KCIO₃\(\longrightarrow \)?
(ii) ZnS + O₂\(\longrightarrow \) ?
(iii) Al₂O₃ + NaOH + H₂O\(\longrightarrow \) ?
(iv) NaOH + SO₂\(\longrightarrow \) ?
(v) KCI+ H₂SO₄ \(\longrightarrow \) ?

Complete the following equations:
a. 4NaCI + MnO₂ + 4H₂SO₄ \(\longrightarrow \)?
b. 6XeF₄ + 12H₂O\(\longrightarrow \)  ?

(i) \(\mathrm{PCl}_{5}+\mathrm{Ag} \longrightarrow \text { ? } \)
(ii) \(\mathrm{AgCl}_{(s)}+\mathrm{NH}_{3(\mathrm{aq})} \longrightarrow ? \)
(iii) \(\mathrm{PCl}_{3} \stackrel{\text { Moist air }}{\longrightarrow} \text { ? } \)
(iv) \(\mathrm{PCl}_{5} \stackrel{\text { Moist air }}{\longrightarrow} ? \)
(v) \(\mathrm{NaH}_{2} \mathrm{PO}_{2}+\mathrm{HCl} \longrightarrow ?\)

Why is there a variation of atomic and ionic size as we move from Sc to Zn?

Indicate the types of isomerism exhibited by the following complexes and draw the structures for these isomers.
(i) K[Cr(H₂O)₂ (C₂O₄)₂]
(ii) [Co(en)₃]CI₃
(iii) [Co(NH₃)₅(NO₂)](NO₃)₂
(iv) [Pt (NH₃)(H₂O)CI₂]

Write note on impurity defect?

If 30% of a first order reaction is completed in 12 mins, what percentage will be completed in 65.33 mins?

Calculate the pH of solution with HO⁺ concentrations in mol dm^-3.
(i) 10^-4
(ii) 10^-7
(iii) 6.8 x 10^-3
(iv) 3.2 x 10^-5
(v) 0.035
(vi) 0.25
(vii) 5.4 x 10^-9
(viii) 7.1 x 10^-7

The standard reduction potential for the reaction Sn⁴⁺ + 2e^- ⟶ Sn²⁺ is + 0.15v. Calcuate the free energy change of the reaction.