Amines — Chemistry STD 12 Science — Question

How would you account for the following:
Of the d⁴ species, Cr²⁺ is strongly reducing while manganese(III) is strongly oxidising.

In a pseudo first order hydrolysis of ester in water, the following results were obtained:

t/s	0	30	60	90
[Ester]/mol L-1	0.55	0.31	0.17	0.085

1. Calculate the average rate of reaction between the time interval 30 to 60 seconds.
2. Calculate the pseudo first order rate constant for the hydrolysis of ester.

Consider a certain reaction A → Products with k = 2.0 × 10^–2s^–1. Calculate the concentration of A remaining after 100 s if the initial concentration of A is 1.0 mol L^–1.

Explain reactivity order of S_N1 and S_N2 reaction for alkyl halide, allylic halide and benzylic halide.

Explain the following with an example :
Reimer-Tiemann reaction.

What do you understand by lanthanoid contraction?

Explain the alkylation process of amine compounds with example.

Compound (A) is formed when benzene diazonium chloride is mixed with KI solution. Compound (B) is formed when ( A ) reacts with sodium in the presence of dry ether. Write the names of (A) and (B) and the equations of the chemical reactions involved.

If the value of rate constants are same for three reactions whose orders are 1,2 , and 3 , then what will be the order of the rates of these reactions if the value of concentration is 1 M , less than 1 M and more than 1 M ?