Question

(a) Solution 'A' gives pink colour when a drop of phenolphthalein indicator is added
to it. Solution 'B' gives a red colour when a drop of methyl orange is added to it.
What type of solutions are 'A' and 'B'and which of these will have higher pH?
(b) Give reasons:
(b) White silver chloride turns grey in sunlight.
(ii) Brown coloured copper powder on heating in air turns into black coloured
substance.​

Answer 1

Answer:

please mark as brilliance

Explanation:

Silver chloride turns grey on exposure to sunlight because it decomposes in presence of sunlight to give silver (Ag).

This black substance formed on the surface is because of the process called surface oxidation. Upon heating, the copper metal melts gradually and turns black on the surface. This is because the copper powder present in the china dish reacts with the atmospheric oxygen and forms copper (II) oxide.

Answer 2

Explanation:

A nonfinite verb is a verb that is not finite. Nonfinite verbs cannot perform action as the root of an independent clause. Most nonfinite verbs found in English are infinitives, participles and gerunds.