Advertisements
Advertisements
प्रश्न
State one characteristic of the chemical reaction which takes place when dilute hydrochloric acid is added to sodium carbonate.
Advertisements
उत्तर
When sodium carbonate is added to dilute hydrochloric acid, carbon dioxide gas evolves. Hence, this reaction is characterised by the evolution of gas.
APPEARS IN
संबंधित प्रश्न
Balance the following chemical equation.
\[\ce{NaCl + AgNO3 -> AgCl + NaNO3}\]
Translate the following statement into chemical equation and then balance it.
Hydrogen gas combines with nitrogen to form ammonia
Chemical equations are balanced to satisfy the law of ______.
Write the balanced equation for the following reaction, and add the state symbol:
Sodium hydroxide reacts with sulphuric acid to produce sodium sulphate and water.
A metal X forms a salt XSO4. The salt XSO4 forms a clear solution in water which reacts with sodium hydroxide solution to form a blue precipitate Y. Metal X is used in making electric wire and alloys like brass.
(a) What do you think metal X could be?
(b) Write the name, formula and colour of salt XSO4.
(c) What is the blue precipitate Y?
(d) Write a chemical equation of the reaction which takes place when salt XSO4 reacts with sodium hydroxide solution. Give the state symbols of all the reactants and products which occur in the above equation.
Write word equation for the following skeletal equation:
\[\ce{AgBr -> Ag + Br2}\]
Balance the following chemical equation :
Na2CO3 + HCl → NaCI + H2O + CO2
What information do you get from the equation H2+ Cl2 → 2HCl ?
What do the following symbol stand for?
2H2
What information do the following chemical equations convey? Mg + 2HCl → MgCl2+ H2
Write the balanced chemical equation of the following reaction. iron + sulphuric acid → ferrous sulphate + hydrogen.
Write the balanced chemical equation of the following reaction.
potassium dichromate + sulphuric acid → potassium sulphate + chromium sulphate + water + oxygen.
\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]
0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate the mass of chlorine gas formed.
Define: Endothermic reaction
In certain reaction a change of state is observed i.e. solid to liquid, liquid to gas etc. – State the change of state of the products – to give the respective reactant.
\[\ce{2H2O ->[electric][current] 2H2 + O2}\]
Give one example in the case where supplying energy [given below] is necessary for a chemical reaction.
Catalyst
Balance the following simple equation:
Ca + H2O → Ca(OH)2 + H2
Balance the following simple equation:
Fe2O3 + CO → Fe + CO2
Write a balanced equation for the following word equation:
Nitrogen dioxide + Water + Oxygen → Nitric acid
Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.
C2H5OH + 3O2 → 2CO2 + 2H2O
