Chemistry

Barfoed test:-
In this test, copper acetate in dilute acid is reduced in 30 seconds by mono saccharides while disaccharides takes several minutes.

[Aldol condensation of 2-methylcyclopentanone with acetaldehyde to form an aldol product, which then undergoes iodoform reaction to give a carboxylic acid and iodoform.]

Rate = K [A]?
K = Rate / [A]?
= (mole L? ¹s? ¹) / (mole L? ¹)?
= mole¹? L? ¹ s? ¹
Unit of K: mole¹? L? ¹ s? ¹

Rutherford atomic model can not explain hydrogen spectrum it is explained by Bohr's atomic model and from Bohr's atomic model, uncertainity principle can't be explained.

Density ∝ molar mass, as size of given molecules is nearly same

(a) Phenol with Br? / H? O gives 2,4,6-tribromophenol. (High ionisation due to polar solvent and high activation of ring)
(b) Phenol with Br? in CS? /CHCl? /FeBr? gives a mixture of o- and p-bromophenol, with p-bromophenol as the major product. (less ionisation due to non- polar solvent)
[Chemical reactions showing bromination of phenol under different conditions]

(A) Concentration of Ag & Au done by NaCN. It is known as Mac Arthur Process (cyanide process)
(B) Blast furnace produces pig Fe.
(C) Blister Cu → Reverberatory furnace. In this furnace smelting & roasting of ore take place
CuFeS? + O? → Cu? O + FeO
(D) Froth floatation process is used for concentration of sulphide ores.

Polyamide copolymers are biodegradable polymers.
Polymers Nylon-2 Nylon-6 are polyamides and monomers of Nylon-2 nylon-6 are:
H? N–CH? –COOH (Glycine) & H? N– (CH? )? –COOH (Aminocaproic acid)