Amines — Chemistry STD 12 Science — Question

Match the items given in Column I and Column II.

	Column I		Column II
i.	Saturated solution	a.	Solution having same osmotic pressure at a given temperature as that of given solution.
ii.	Binary solution	b.	A solution whose osmotic pressure is less than that of another.
iii.	Isotonic solution	c.	Solution with two components.
iv.	Hypotonic solution	d.	A solution which contains maximum amount of solute that can be dissolved in a given amount of solvent at a given temperature.
v.	Solid solution	e.	A solution whose osmotic pressure is more than that of another.
vi	Hypertonic solution	f.	A solution in solid phase.

(a) What is van't Hoff factor? Explain.
(b) Write the equation of molecular number properties including van't Hoff factor.

Explain the structure of fructose.

 Match the complex species given in Column I with the possible isomerism given in Column II and assign the correct code:

	Column I (Complex species)		Column II (Isomerism)
a.	[Co(NH3)4Cl2]+	1.	Optical
b.	cis-[Co(en)2Cl2]+	2.	Ionisation
c.	[Co(NH3)5 (NO2)]Cl2	3.	Coordination
d.	[Co(NH3)6][Cr(CN)6]	4.	Geometrical
		5.	Linkage

Code:

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

How will you obtain the following compounds from ethyl alcohol? Explain with equation :
(i) Diethyl ether
(ii) Iodoform
(iii) Ethyl acetate
(iv) Acetaldehyde

An aromatic compound ‘A’ on treatment with CHCl₃/ KOH gives two compounds ‘B’ and ‘C’. Both B and C give the same product ‘D’ when distilled with zinc dust. Oxidation of D gives E having molecular formula C₇H₆O₂. The sodium salt of E on heating with sodalime gives F which may also be obtained by distilling A with zinc dust. Identify A to F.

Write the rate law for a first order reaction. Justify the statement that half life for a first order reaction is independent of the initial concentration of the reactant.