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प्रश्न
State which of the following statement is true or false. If false write the correct statement.
Atoms/molecules in gases move only about their own positions.
विकल्प
True
False
उत्तर
False
Correct statement: Atoms/molecules in gases move everywhere.
संबंधित प्रश्न
Convert the following temperature to the celsius scale.
470 K
What do you mean by the change of state? Write the flow chart showing the complete cycle of change of state.
Fill in the following blank with suitable words :
Gases can be liquefied by applying ....................... and lowering .....................
Define the term 'latent heat of fusion' of a solid. How much is the latent heat of fusion of ice ?
Which of the following process/processes release heat ?
- condensation
- vaporisation
- freezing
- melting
There are four substances W, X, Y and Z. The substance W is a dark violet solid having diatomic molecules. A solution of W in alcohol is used as a common antiseptic C. The substance X is a white solid which is usually recovered from sea water on a large scale. The substance Y is a white solid which is insoluble in water and used in the form of small balls for the safe storage of woollen clothes. The substance Z is a yet another white solid which is used in making commonly used dry cells.
- Name (i) W (ii) X (iii) Y and (iv) Z.
- Out of W, X, Y and Z, which substance/substances can undergo sublimation ?
- Which substance is organic in nature ?
- What is the name of substance C ?
- Which substance belongs to the halogen family ?
When water is heated to a temperature x, it gets converted into steam at temperature x by a process called R. And when steam at temperature x is cooled, it gets reconverted into water at the same temperature x by a process called S.
- How much is the value of x in Kelvin ?
- What is the process R called ?
- What is the name of the energy absorbed during the process R ?
- What is process S known as ?
- What is the name of energy released during the process S known as ?\\
Give two examples of the following:
Substances which sublime.
Explain the term condensation
Matter in any state is composed of small particles – molecules, atoms, or ions. Differentiate the terms above in Italics.
