Matter In Our Surrounding Test

Find the incorrect statement

The melting point of a substance is defined as the constant temperature at Atmospheric pressure when

Which one of the following decreases the extent of evaporation of water?

A desert cooler given comfort due to cooling caused by evaporation of water. Under which one of the following conditions it works more effectively?

When alcohol is kept in a china dish it evaporates, temperature falls and cooling is produced. Which one is the correct method to record the temperature?

In an endothermic process heat is absorbed, in an exothermic process heat is evolved and in an athermic process no thermal change is observed. What is the nature of evaporation of ether?

Statement A: Petrol, ether, acetone, water, \({\text{CC}}{{\text{l}}_{\text{4}}}\)are volatile liquid Statement B: Naphthalene, Camphor, iodine, \({\text{N}}{{\text{H}}_{\text{4}}}{\text{Cl}}\)undergo sublimation. Which of the two statement is true

Which of the following solids undergo sublimation upon heating?

When the liquid starts boiling, the further heat energy which is supplied

Statement A: Evaporation is a surface phenomenon but boiling is not. Statement B: The diffusion of the gases varies inversely as the square root of their densities. Which of the two statements is true?

Name a process by which an impure sample of naphthalene can be purified.

A liquid is kept in an open china dish. A The evaporation of the liquid can be accelerated

Which of the following energy is absorbed during change of state of a substance?

Diethyl ether evaporates faster than ethyl alcohol because of which factor?

Equal volume of ethanol is kept separately in a test tube, in a china dish, in a water glass and in a conical flask. In which container alcohol evaporates faster?