Chemistry Past Questions and Answers

Chlorine atom forms Cl- by ____________

The most efficient absorber of ultraviolet radiation in the atmosphere is ____________

When dust particles collide randomly in a beam of Sunlight, the phenomenon observed is known as ____________

\( ^{234}_{90}Th → ^{234}_{91}Pa + X \)
In the nuclear reaction above, X is ____________

What is the colour of phenolphthalein indicator in a basic medium?