Explain refining of nickel by mond's process

What are the various methods by which carbon-di-oxide is prepared?

Give a detailed account on allotropes of sulphur.

Explain the Deacon's process.

Complete the following reactions
(i) Cr₂O₇^2- ⟶
(ii) Cr₂O₇^2- + 6I^-+ 14H⁺ ⟶
(iii)  Cr₂O₇^2-+ 3S^2-+ 14H⁺ ⟶
(iv) Cr₂O₇^2- + 3SO₂ + 2H⁺ ⟶
(v) Cr₂O₇^2- + 3Sn²⁺ + 14H⁺ ⟶
(vi) K₂Cr₂O₇ + 8H₂SO₄ + 3CH₃CH₂OH ⟶
(vii) 2MnO₄^- + 5(COO)^2- + 6H⁺ ⟶
(viii) 2MnO₄^- + 10I^- + 16H⁺ ⟶
(ix) 2MnO₄^- + 5S^2-+ 16H⁺ ⟶
(x) 2MnO₄^- + 5NO₂^- + 6H⁺ ⟶
(xi) 2KMnO₄ + 3H₂SO₄ + 5CH₃CH₂OH ⟶
(xii) 2MnO₄^- + 5SO₃^2- + 6H⁺ ⟶

How are metal carbonyls classified based on the structure?

How can you determine the atomic mass of an unknown metal if you know its density and the dimension of its unit cell? Explain.

For the reaction R - P, the concentration of a reactant changes from 0.03 M to 0.02 M in 25 minutes. Calculate the average rate of reaction using units of time both in minutes and second.

The half life period of first order reactions is 10 mins. What percentage of the reactant will remain after one hour?

Calculate the pH of 0.001 M HCI solution.

To 1M solution of AgNO₃, 0.75 F quantity of current is passed. What is the concentration of the electrolyte, AgNO₃ remaining in the solution?

If E₁ = 0.5 V corresponds to Cr³⁺+ 3e^- ➝ Cr_(s) and E₂ = 0.41V corresponds to Cr³⁺+ e^- ➝ Cr²⁺ reactions, calculate the emf (E₃) of the reaction Cr²⁺+ 2 e^- ➝ Cr_(s)

Explain SHE as a reference electrode.

Write a note on Freundlich adsorption isotherm.

An organic compound A of molecular formula C₃H₆O on reduction with LiAlH₄ gives B. Compound B gives blue colour in Victor Meyer's test and also forms a chloride C with SOCl₂. The chloride on treatment with alcoholic KOH gives D. Identify A, B, C and D and explain the reactions.

An organic compound A (C₂H₆O₂) liberates hydrogen with metallic sodium. Compound A when heated with anhydrous zinc chloride ultimately gives B (C₂H₄O) whereas) when heated with cone. phosphoric acid gives C (C₄H₁₀O₃). A on oxidation with acidified K₂Cr₂O₇ gives compound D (CH₂O₂). Identify A, B, C and D. Explain the reactions involved.

What are ethers? Write note on simple and mixed ethers with examples.

An organic compound (A) C₆H₆O gives violet colour with neutral FeCl₃ solution. With NH₃ in the presence of anhydrous ZnCI₂, (A) gives (B) (C₆H₇N). (A) with dimethyl sulphate gives (C) (C₇H₈O). What are (A), (B) and (C)? Explain the reactions.

Explain the mechanism of Cannizaro reaction.

How do you distinguish formic acid from acetic acid?

An aromatic compound (A) with molecular formula C₇H₆O has the smell of bitter almonds. (A) reacts with Cl₂ in the absence of catalyst to give (B) and in the presence of catalyst compound (A) reacts with chlorine to give (C). Identify (A), (B) and (C). Explain the reactions.

An organic compound (A) of molecular formula C₇H₆O is called as oil of bitter almonds. (A) on oxidation gives (B) of molecular formula C₇H₆O₂ which gives brisk effervescence with NaHCO₃ solution. When (A) is refluxed with aqueous alcoholic (KCN) compound (C) is formed. Identify A, B and C and write the equations.

What happens when ethylamine is treated with
(i) CHCl₃/NaOH
(ii) CS₂
(iii) C₆H₅CHO.

Explain the classification of hormones.

Explain the classification of polymers based on their structure and mode of synthesis.