Why is Purple Colour Not Used in Any Flag ? | Unknown Facts | Anushya Ma'am #shorts #ytshorts

Why are short waves used in long distance broadcasts?

Why should the species not in any way useful by protected ?

When a crystal of potassium peramagnate is placed in a beaker, its purple colour spreads throughout the water. What does this observation tell us about the nature of pottassium permanganate and water?

Below there is a conversation between a teacher and student of class 3rd on the topic Air Teacher:What will happen if there is unclean or polluted air in the whole world Student I:Ma'am will not get proper oxygen to breathe in StudentII:There will be no animals ,insectes etc Teacher:So what we will do? Student III:Ma'am for fresh air we have to plant more or more trees and stop using personal vehicle for traveling this interaction shows that students are good in

(a) Account for the following: (i) Manganese shows maximum number of oxidation states in 3d series? (ii) E^@ value for Mn^(3+)| Mn^(2+) couple is much more positive than that of Cr^(3+)| Cr^(2+) . (iii) Ti^(4+) is colourless whereas V^(4+) is coloured in an aqueous solution. (b) Write the chemical equations for the preparation of KMnO_4 from MnO_2 . Why does purple colour of acidified permanganate solution decolourise when it oxidise Fe^(2+) to Fe^(3+) .