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प्रश्न
Give the usual name for the following :
Heat required to change the state of a substance without changing the temperature.
उत्तर
The heat required to change the state of a substance without changing its temperature is called latent heat.
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संबंधित प्रश्न
Convert the following temperature to Celsius scale:
573 K
The boiling point of alcohol is 78° C. What is this temperature on Kelvin scale ?
Define the following term Boiling.
Which of the following process/processes release heat ?
- condensation
- vaporisation
- freezing
- melting
When heat is constantly supplied by a gas burner with small flame to melt ice, then the temperature of ice during 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 ?
State the property of the following substance.
Lead chloride reacts with barium sulphate to give a white precipitate of lead sulphate.
Fill in the blank with the correct word of the statement given below:
Sublimation is _______ a change of state of matter.
Fill in the blanks with the correct words of the statement given below:
During sublimation, a solid on heating turns directly into _________ and on cooling back to __________.
With reference to the liquid state of matter – answer the following
At what point will the particles become free and escape as a gas.
