When NaOH pallets are left in the open air they acquire a fluid layer around each crystal as

When NaOH crystals are left in open air, they acquire a fluid layer around each crystal as

When crystals of washing soda are left open in air, they lose

Any article of iron if left in open for some time, acquires a film of brownish substance (rust) having chemical formula ____

when 1200 ml air is left in the lungs , it is called

when 1200 ml air is left in the lungs , it is called

When crystal of caustic soda is exposed to air a liquid layer is deposited because the crystal

The layer of air around the earth is known as ____