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प्रश्न
Explain, giving one example of the following chemical changes:
Double decomposition
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उत्तर
Double decomposition is a type of chemical change in which two compounds in a solution react to form two new compounds by mutual exchange of radicals. Double decomposition reaction is also called a double displacement reaction.
\[\ce{AB + CD -> AD + CB}\]
Example - \[\ce{AgNO3 + NaCl -> AgCl \downarrow + NaNO3}\]
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संबंधित प्रश्न
State the type of reactions for the following represent and balance the ones that are not balanced.
Fe + CuSO4→ FeSO4 + Cu
State the type of reactions for the following represent and balance the ones that are not balanced.
KNO3 + H2SO4 → HNO3 + KHSO4
On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.
A coloured substance which decomposes violently leaving a coloured residue and evolving two neutral gases one of which is unreactive or inert in nature.
Define the following type of chemical change or reaction with a suitable example.
Decomposition reaction
Define the following type of chemical change or reaction with a suitable example.
Double decomposition reaction
Give a balanced equation for the following reaction of synthesis involving the formation of:
An alkali – from a basic oxide – sodium oxide
Give a balanced equation for the following reaction of synthesis involving the formation of:
A salt – from a trivalent metal and a coloured gas.
Give a balanced equation for thermal decomposition of lead nitrate
Give a balanced equation for thermal decomposition of calcium hydroxide
Give a reason why zinc displaces hydrogen from dilute sulphuric acid but copper does not.
