The largest natural number by which the product of three consecutive even natural numbers is always divisible is

Mica is used in an electric iron because it is a

The carbon filament is invented by

The blue colour of sky is due to the phenomenon of

If the doors of a refrigerator are left open for a few hours, the room temperature will____?

Where should an object be placed so that a real and inverted image of the same size is obtained using a convex lens?

The bases of cooking vessels are painted ___ in order to absorb more heat.

Photoelectric effect was discovered by

Which instrument measures the intensity of earthquake shocks?

Decibel is used to measure______?

The molecular weight of water is___?