Chemistry - Complete P-block Question with Solution | TestHub
Compare three alkali metal salts of the composition (where x are three different small integers and M is an alkali metal). To each of the three salts apply some of the following assertions :
(a) The bond is characteristic for the anion.
(b) The bond is characteristic for the anion.
(c) The bond is characteristics for the anion.
(d) All sulphur atoms are in same oxidation states.
(e) In aqueous solution, it is able to oxidise Mn (II) salt to permanganate.
(f) It is formed by the reaction of an aqueous solution of sulphite with sulphur.
(g) Its aqueous solution dissolves silver bromide.
Calculate the value of (P × Q × R).
where
P = Number assertions correctly applied for M2S2Ox when x = 3
Q = Number assertions correctly applied for M2S2Ox when x = 7
R = Number assertions correctly applied for M2S2Ox when x = 8
Answer:
Solution:
The three salts are M₂S₂O₃ (thiosulfate), M₂S₂O₇ (pyrosulfate), and M₂S₂O₈ (peroxodisulfate).
For M₂S₂O₃ (x=3): P = 3 (assertions b, f, g)
For M₂S₂O₇ (x=7): Q = 2 (assertions c, d)
For M₂S₂O₈ (x=8): R = 3 (assertions a, d, e)
P = 3, Q = 2, R = 3
P * Q * R = 3 * 2 * 3 = 18