Amines — Chemistry STD 12 Science — Question

Match the catalysts given in Column I with the processes given in Column II.

	Column I (Catalyst)		Column II (Process)
(i)	Ni in the presence of hydrogen	(a)	Zieglar Natta catalyst
(ii)	Cu2Cl2	(b)	Contact process
(iii)	V2O5	(c)	Vegetable oil to ghee
(iv)	Finely divided iron	(d)	Sandmeyer reaction
(v)	TiCl4 + Al (CH3)3	(e)	Haber’s Process
		(f)	Decomposition of KClO3

Match the complex ions given in Column I with the colours given in Column II and assign the correct code:

	Column I (Complex ion)		Column II (Colour)
a.	[Co(NH3)6]3+	1.	Violet
b.	[Ti(H2O)6]3+	2.	Green
c.	[Ni(H2O)6]2+	3.	Pale blue
d.	[Ni(H2O)4(en)]2+ (aq)	4.	Yellowish orange
		5.	Blue

Code:

1. A (1), B (2), C (4), D (5).
2. A (4), B (3), C (2), D (1).
3. A (3), B (2), C (4), D (1).
4. A (4), B (1), C (2), D (3).

Answer the following question:
How will you convert phenol to benzoic acid?

In the reaction
Q + R → Products
The time taken for 99% reaction of Q is twice the time taken for 90% reaction of R. The concentration of R varies with time as shown in the figure given alongside.

What is the overall order of the reaction? Give the units of the rate constant for the same. Write the rate expression for the above reaction.

Primary alkyl halide C4H9Br (a) reacted with alcoholic KOH to give compound (b). Compound (b) is reacted with HBr to give (c) which is an isomer of (a). When (a) is reacted with sodium metal it gives compound (d), C8H18 which is different from the compound formed when n-butyl bromide is reacted with sodium. Give the structural formula of (a) and write the equations for all the reactions.

Answer the following questions:
Give chemical reactions for the following observations:

1. Potassium permanganate is a good oxidising agent in basic medium.
2. Inter convertibility of chromate ion and dichromate ion in aqueous solution depends upon pH of the solution.
3. Potassium permanganate is thermally unstable at 513K.

Why is the mass determined by measuring a colligative property in case of some solutes abnormal? Discuss it with the help of Van’t Hoff factor.