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प्रश्न
Explain, giving one example of the following chemical change:
Thermal dissociation
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उत्तर
A reversible decomposition reaction brought about only by heat is called thermal dissociation reaction.
Heat some solid ammonium chloride in a test tube. Two colourless gases, ammonia and hydrogen chloride, are produced. As these gases move up to the upper part of the cooler test tube, they combine to form ammonium chloride, which appears as a white sublimate on the upper cooler side of the test tube.
\[\ce{NH4Cl <=> NH3 \uparrow + HCl \uparrow}\]
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संबंधित प्रश्न
Give an example of double displacement reaction, where a gas is evolved.
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Give two balanced reactions.
State which of the substance given below evolve oxygen gas on thermal decomposition.
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State which of the substance given below evolve oxygen gas on thermal decomposition.
Zinc nitrate
Give a balanced equation for a direct combination reaction involving:
Two elements – one of which is a neutral gas and the other a yellow non-metal
Convert hydrogen to hydrogen chloride by a direct combination reaction.
Define a thermal dissociation reaction with a suitable example.
Name a metallic oxide which on thermal decomposition is reduced to metal.
Complete the statement by filling in the blank with the correct word:
The neutral gas evolved when lead nitrate undergoes thermal decomposition is _________.
Chemical reaction in which reactants react to form products and the products formed react with each other directly to form the original reactants back is known as ______ reaction.
