14 solutions available
Question 1Discuss the three states of matter: solid, liquid and gas on the basis of molecular model.
Question 2What do you mean by 'the change of state'? Write the flowchart showing the complete cycle of change of state.
Question 3Differentiate between melting point and boiling point, giving atleast one example of each.
Question 4Describe the process of condensation and sublimation with examples.
Question 6Describe an experiment to demonstrate that a substance absorbs heat during melting without change in its temperature.
Question 7Explain the terms vaporization and boiling point.
Question 8Describe an experiment to demonstrate that water absorbs heat during boiling at a constant temperature.
Question 10Explain with an example that when a liquid evaporates, it takes heat from its surroundings.
Question 12Describe an experiment to demonstrate the process of sublimation.
Question 1(i)Identify the correct statement.(1) The molecules of water move faster than ice.(2) The molecules are more closely packed in ice than...
Question 5Which of the following are correct?(a) Solids have definite shape and definite volume.(b) Liquids have definite volume but no definite...
Question 11Why is cooling produced on evaporation of a liquid?
Question 13What do you mean by sublimation? Explain with an example.
Question 14Why does the size of naphthalene balls decrease when left open?