Biomolecules — Chemistry STD 12 Science — Question

State how the following compounds obtained from benzoic acid 2.
(i) m-Nitrobenzoic acid (ii) m-Bromobenzoic acid

Answer the following:
(a) Give two examples of non-chemical process which obeys the first order kinetics.
(b) The following results have been obtained during the kinetic studies for the reaction:
P+2Q → R + 2S

Exp.	Initial P(mol/L)	Initial Q (mol/L)	Init. Rate of Formation of R(M min-1)
1	0.10	0.10	3.0 x 10-4
2	0.30	0.30	9.0 x 10-4
3	0.10	0.30	3.0 x 10-4
4	0.10	0.40	6.0 x 10-4

Determine the rate law expression for the reaction.

The molar mass of a volatile substance cannot be determined from boiling point elevation. Why?

What do you mean by Primary Cell?

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

Note: In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.

1. Both assertion and reason are true and the reason is the correct explanation of assertion.
2. Both assertion and reason are true and the reason is not the correct explanation of assertion.
3. Assertion is true but the reason is false.
4. Both assertion and reason are false.
5. Assertion is false but reason is true.

Assertion: Mercury cell does not give steady potential.
Reason: In the cell reaction, ions are not involved in solution.

Write the cell reaction of a lead storage battery when it is discharged. How does the density of the electrolyte change when the battery is discharged?

For the decomposition of azoisopropane to hexane and nitrogen at 543 K, the following data are obtained.

t (sec)	P(mm of Hg)
0	35.0
360	54.0
720	63.0

Calculate the rate constant.

Explain (% V/V) Volume Percentage with examples.