Question

identify the incorrect pair:

1. quicklime-calcium hydroxide
2. lemon-ascorbic acid
3. tamarind-tartaric acid
4. yoghurt-lactic acid

Answer 1

Quick Lime Formula is CaO and It is chemically known as Calcium Oxide .
Calcium Hydroxide is called as Slaked lime with formula : Ca(OH)2

where as  Lemon contains Ascorbic acid[Vitamin C ] as well as Citric acid which acts as good antioxidant, which is correct.
Tamarind contains tartaric acid .
Yoghurt contains lactic acid.

Hence the incorrect pair would be 1. quicklime - calcium hydroxide

Answer 2

The incorrect pair is Quicklime - Calcium Hydroxide.

Quicklime or lime is an inorganic material known as Calcium oxide (CaO).Calcium carbonate or limestone, also known as chalk is subjected to calcination which forms quicklime (CaO).

Upon subsequent addition of water, hydrated lime or slaked lime is formed which is called as Calcium Hydroxide (CaOH2).