Advertisements
Advertisements
प्रश्न
State one characteristic of the chemical reaction which takes place when dilute hydrochloric acid is added to sodium carbonate.
उत्तर
When sodium carbonate is added to dilute hydrochloric acid, carbon dioxide gas evolves. Hence, this reaction is characterised by evolution of gas.
APPEARS IN
संबंधित प्रश्न
What is wrong with the following chemical equation?
Mg + O → MgO
Correct and balance it.
How will you indicate Exothermic reaction in a chemical equation?
With the help of an appropriate example, justify that some of the chemical reactions are determined by Evolution of a gas.
Give chemical equation for the reaction involved in the above case.
Is Photosynthesis an endothermic reaction or an exothermic reaction?
Zinc oxide reacts with carbon, on heating, to form zinc metal and carbon monoxide. Write a balanced chemical equation for this reaction. Name (i) oxidising agent, (ii) reducing agent, in this reaction.
Write your observation for the following chemical reaction and name the product formed:
When sugar is heated.
Write the balanced chemical equation of the following reaction.
silver nitrate → silver + nitrogen dioxide + oxygen
Give one example in the case where supplying energy [given below] is necessary for a chemical reaction.
Electrical energy
Balance the following simple equation:
Zn + NaOH → Na2ZnO2 + H2
A student took a small amount of copper oxide in a conical flask and added dilute hydrochloric acid to it with constant stirring. He observed a change in colour of the solution.
- Write the name of the compound formed and its colour.
- Write a balanced chemical equation for the reaction involved.