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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 the types of reaction with reference to oxygen and hydrogen. Illustratre with examples.
Complete the following statement.
The chemical change involving iron and hydrochloric acid illustrates a _________________ reaction.
Explain, giving one example of the following chemical changes:
Double decomposition
State which of the substance given below evolve oxygen gas on thermal decomposition.
Zinc nitrate
State which of the substance given below evolve oxygen gas on thermal decomposition.
Mercury [II] oxide
Give a balanced equation for a direct combination reaction involving:
Two elements – one of which is a neutral gas and the other a monovalent metal
Give a balanced equation for thermal decomposition of mercury [II] oxide
Select the correct answer from the options given below:
State the gaseous product formed, when
A metallic nitrate undergoes thermal decomposition giving a coloured gas.
Give a balanced equation for the following type of reaction:
A synthesis reaction between a metal and a non-metal resulting in the formation of an insoluble salt of iron.
Differentiate between the following:
Thermal decomposition & thermal dissociation.
