Chemistry Term 2 - Delhi Set 2 2021-2022 Science (English Medium) Class 12 Question Paper Solution

Identify the order of reaction from the following unit for its rate constant:

L mol^–1s^–1

The conversion of molecules A to B follow second order kinetics. If concentration of A is increased to three times, how will it affect the rate of formation of B?

Write the expression of integrated rate equation for zero order reaction.

Explain the following reactions:

Clemmensen reaction

Explain the following reactions:

Stephan reaction

Explain the following reactions:

Wolff Kishner reduction

Explain the following reaction:

Cannizzaro reaction

Observe the graph shown in figure and answer the following questions:

1. What is the order of the reaction?
2. What is the slope of the curve?
3. Write the relationship between k and t_1/2 (half life period).

Write the IUPAC name of the following complex:

[Pt(NH₃)₆]Cl₄

On the basis of crystal field theory, write the electronic configuration for d⁴ ion if ∆₀ < P.

What are Heteroleptic complexes?

Using IUPAC norms write the formulas for the following:

Pentaamminenitrito-N-Cobalt (III)

Using IUPAC norms write the formulas for the following:

Tetrahydroxidozincate (II)

What is crystal field splitting energy?

Define coagulation.

Define coagulation.

What is Electrophoresis?

Write three differences between Physisorption and Chemisorption.

Write any two consequences of Lanthanoid Contraction.

Name the element of 3d series which exhibits the largest number of oxidation states. Give reason.

Give reason for the following statement:

[Ti(H₂O)]³⁺ is coloured while [Sc(H₂O)₆]³⁺ is colourless.

Give reason for the following statement:

Physical and chemical properties of the 4d and 5d series of the transition elements are quite similar to expected.

Give reason for the following statement:

Physical and chemical properties of the 4d and 5d series of the transition elements are quite similar to expected.

Account for the following:

pK_b of aniline is more than that of methylamine.

Give reasons for the following:

Aniline does not undergo Friedel- Crafts reaction.

Give reason for the following:

Primary amines have higher boiling point than tertiary amines.

Account for the following:

Arrange the following compounds in the increasing order of their basic strength in aqueous solution: CH₃NH₂,(CH₃)₃N,(CH₃)₂NH

What is Hinsberg's reagent?

What is the role of pyridine in the acylation reaction of amines?

A primary amine 'A' C₂H₇N reacts with alkyl halide (C₂H₅l) to give secondary amine 'B'. 'B' reacts with C₆H₅SO₂Cl to give a solid 'C' which is insoluble in alkali. Identify 'A', 'B', 'C' and write all the chemical reaction involved.

Complete the following:

\[\ce{CH3CN ->[1. AlH(i - Bu)2][2. H2O] 'A' ->[H2N-OH][H^+] 'B'}\]

Write IUPAC name of the following compound:

Write chemical test to distinguish between the following compounds:

Phenol and Benzoic acid

Convert the following:

Benzoic acid to Benzaldehyde

Convert the following:

Propan-1-ol to 2-Bromopropanoic acid

Convert the following:

Acetaldehyde to But-2-enal

Read the passage given below and answer the questions that follow:

1. Is silver plate the anode or cathode?  (1)
2. What will happen if the salt bridge is removed?  (1)
3. When does electrochemical cell behaves like an electrolytic cell?  (1)
4. (i) What will happen to the concentration of Zn²⁺ and Ag⁺ when E_cell = 0.   (1)
   (ii) Why does conductivity of a solution decreases with dilution?  (1)
   OR
   The molar conductivity of a 1.5 M solution of an electrolyte is found to be 138.9 S cm²mol^-1. Calculate the conductivity of this solution.  (2)