Chemistry
What happens when a chemical bond is formed ?

Energy is neither released nor absorbed
More energy is released than is absorbed
Energy in always released
Energy is always absorbed

ANSWER DOWNLOAD EXAMIANS APP

Chemistry
Sodium vapour lamps glow with yellow colour. This is due to

sublimation of sodium to emit yellow colour
The emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum
Its ability to absorb all other colours except yellow
The low ionisation energy of sodium

ANSWER DOWNLOAD EXAMIANS APP