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प्रश्न
What is meant by the following term?
Decrepitation
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उत्तर
It is the breaking of a substance usually accompanied by the emission of a crackling sound. An example of a substance that decomposes on heating is Lead nitrate, Pb(NO3)2.
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संबंधित प्रश्न
Give a balanced chemical equation for Laboratory preparation of Nitric acid.
Explain the following:
Dilute nitric acid is generally considered a typical acid but not so in its reaction with metals.
Write an equation for the following conversions A, B, C and D.
Why is the temperature maintained at 200°C in the above reaction?
Give reason for the following:
Commercial nitric acid is yellow in colour, but when it is diluted with water, it turns colourless.
Give reason for the following:
Aqua regia dissolves gold and platinum.
Fill in the blank with appropriate word/words.
Aqua regia is a mixture of _______ and________
What is the special feature of the apparatus that is used in the laboratory preparation of nitric acid?
Explain the following:
Concentrated nitric acid appears yellow when it is left standing in a glass bottle.
The figure given below illustrates the apparatus used in the laboratory preparation of nitric acid.
- Name A (a liquid), B (a solid), and C (a liquid). (Do not give the formulae.)
- Write an equation to show how nitric acid undergoes decomposition.
- Write the equation for the reaction in which copper is oxidised by concentrated nitric acid.
