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प्रश्न
Define the following type of chemical change or reaction with a suitable example.
Direct combination reaction or synthesis
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उत्तर
Direct Combination Reaction or Synthesis:
“Those reactions in which two or more substances [element or elements and compound or compounds] combine and form a new substance”.
\[\ce{H2 + O2->H2O}\]
Hydrogen combines with oxygen to produce new substance water.
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संबंधित प्रश्न
Explain, giving one example of the following chemical changes:
Double decomposition
What is a double displacement reaction?
Decomposition reactions can occur by heat.
Give two balanced reactions for each.
Decomposition reactions can occur by electricity
Give balanced reactions.
Give a balanced equation for a direct combination reaction involving:
Two compounds – resulting in the formation of a weak acid
Convert hydrogen to hydrogen chloride by a direct combination reaction.
Give a balanced equation for thermal decomposition of ammonium dichromate
Give an example of a photochemical decomposition reaction.
Give a reason why zinc displaces hydrogen from dilute sulphuric acid but copper does not.
State the double decomposition – neutralization reaction with a suitable representation.
