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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
State the type of reactions for the following represent and balance the ones that are not balanced.
KNO3 + H2SO4 → HNO3 + KHSO4
State the type of reactions for the following represent and balance the ones that are not balanced.
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A coloured substance which decomposes violently leaving a coloured residue and evolving two neutral gases one of which is unreactive or inert in nature.
The reaction can be classified as:
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The reaction can be classified as:
State which of the following type, take place in the reaction is given below.
\[\ce{SO2 + 2H2O + Cl2->2HCl + H2SO4}\]
Convert hydrogen to hydrogen chloride by a direct combination reaction.
Name a metallic oxide which on thermal decomposition is reduced to metal.
Give a reason why zinc displaces hydrogen from dilute sulphuric acid but copper does not.
Complete the statement by filling in the blank with the correct word:
Direct combination reaction of sulphur dioxide with water gives ________.
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.
