Question

. Mina studies for 5
2/
3
hours daily. She devotes 2 hours of her time for History
and Geography. How much time does she devote for other subjects?

Answer 1

The main use of litmus is to test whether a solution is acidic or basic. Light Blue litmus paper turns red under acidic conditions and red litmus paper turns blue under basic or alkaline conditions, with the color change occurring over the pH range 4.5–8.3 at 25 °C (77 °F). Neutral litmus paper is purple.

Answer 2

Answer:

Oxidation is the loss of electrons. Reduction is the gain of electrons. In terms of oxygen transfer, oxidation may be defined as the chemical process in which a substance gains oxygen or loses electrons and hydrogen. When one of the reactants is oxygen, then oxidation is the gain of oxygen.