Why gas masks are used by miners in coal mines while working ?

Both the energy sources coal and pertoleum take millions of years for their formation. As these resources are being utilised at a much faster rate than their formation, they will...

(a) Burning of wood and coal causes pollution of air.  (b) A liquid fuel used in homes is LPG.  (c) Fuel must be heated to its ignition temperature before it starts burning.  (d)...

Because water molecules act as ligands and results in crystal Fleld splitting of d-orbitals of Cu2+ ion.

Every business needs to take the decision regarding the investment in current assets i.e. the working capital. Current assets refer to the assets that are converted into cash or cash...

Coal is an important source of energy and hence most of the industries are located around coal mines.

(c) Nuclear- energy

Sun and biogas.

Both the energy sources, coal and petroleum, take millions of years for their formation. As these resources are being utilised at a much faster rate than their formation, they will...

While playing a lot of sweating occurs which causes loss of water and salt from the body. Also a lot of energy is exhausted. Since glucose solution provides instant energy,...

Ultraviolet radiations OR Radiations above violet (in VIBGYOR) Frequency range 1015 –1017Hz. Hint: Frequecy of visible light is of the order of 1014Hz.