Description : What changes in matter is brought when it is an Evaporation of a puddle of water?
Last Answer : As the puddle dries out, the water is changed from a liquid into a water vapour. The vapour will be blown away by the wind.
Description : India has eight coastal states but more than half the sea salt is made along the Gujarat coast because (a) Gandhiji started the salt movement in Gujarat (b) Low rainfall and relative humidity are ideal ... ) Kandla port exports salt (d) The salinity of sea water is very high near the Gujarat coast
Last Answer : Ans: (b)
Description : Which of the following is a chemical change? (a) Evaporation of water (b) Burning of candle (c) Glowing of an electric bulb (d) Liquefaction of air
Last Answer : Ans:(b)
Description : Change of state namely evaporation condensation, freezing and melting is an __________ process. (A) Isothermal (B) Adiabatic (C) Isobaric (D) Isochoric
Last Answer : (A) Isothermal
Description : Joints in concrete structures, are provided (A) To reduce the tensile stresses likely to be developed due to evaporation of water (B) To minimise the change in the dimensions of the slab (C) To minimise the necessary cracking (D) All the above
Last Answer : (D) All the above