Advertisements
Advertisements
प्रश्न
What is called thermolysis reactions?
Advertisements
उत्तर
A chemical reaction is a process in which an old bond breaks up and a new chemical bond gets formed. Thermolysis chemical reactions are a special type of chemical reaction in which the reactant gets decomposed by heat. For example,
\[\ce{CaCO3_{(s)}⇌[Heat]CaO_{(s)} + CO2_{(g)}}\]
\[\ce{2HgO_{(s)} ->[Heat]2Hg_{(l)} + O2_{(g)}}\]
In these reactions, heat is supplied to break the bonds, so generally, they are endothermic in nature.
APPEARS IN
संबंधित प्रश्न
Balance the following equation:
\[\ce{NaOH + H2SO4 -> Na2SO4 + H2O}\]
Give one example of an exothermic reaction.
When water is added gradually to a white solid X, a hissing sound is heard and a lot of heat is produced forming a product Y. A suspension of Y in water is applied to the walls of a house during white washing. A clear solution of Y is also used for testing carbon dioxide gas in the laboratory.
- What could be solid X? Write its chemical formula.
- What could be product Y? Write its chemical formula.
- What is the common name of the solution of Y which is used for testing carbon dioxide gas?
- Write chemical equation of the reaction which takes place on adding water to solid X.
- Which characteristic of chemical reactions is illustrated by this example?
Write your observations and name the product when
Iron nails are added to an aqueous solution of copper sulphate.
Balance the following chemical equation :
H2 + O2 → H2O
Balance the following equation:
C + H2SO4 → CO2 + H2O + SO2
Write the balanced chemical equation of the following reaction.
Potassium permanganate + hydrochloric acid → potassium chloride + manganese chloride + chlorine + water
Name the following:
Two gases which react under pressure in presence of a catalyst at elevated temperatures to give a gaseous product.
Balance the following simple equation:
Zn + NaOH → Na2ZnO2 + H2
Complete the following blank in the equation as indicated.
\[\ce{CaH2_{(s)} + 2H2O_{( aq)}-> Ca(OH)2_{(s)} + 2H2_{(g)}}\]
Grams: 42 g + ______ `→` ______ + ______
