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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
State the type of reactions for the following represent and balance the ones that are not balanced.
2KClO3→ 2KCl + 3O2
State the type of reactions for the following represent and balance the ones that are not balanced.
CuO+H2→ Cu+ H2O
State which of the substance given below evolve oxygen gas on thermal decomposition.
Trilead tetroxide
Give a balanced equation for the following reaction of synthesis involving the formation of:
An alkali – from a basic oxide – sodium oxide
Convert nitrogen to ammonia by a direct combination reaction.
Define a thermal dissociation reaction with a suitable example.
Give a reason why zinc displaces hydrogen from dilute sulphuric acid but copper does not.
Give a balanced equation for the preparation of two different insoluble lead salts from their salt solutions by double decomposition precipitation.
Convert an insoluble base
Convert a soluble base to their respective soluble salts by neutralization reaction.
