Thermal decomposition & thermal dissociation. - Vidyadip

Question

Thermal decomposition & thermal dissociation.

✓

Answer

Thermal decomposition and thermal dissociation. Decomposition of a compound on heating into two elements or element and compound or into two new compounds. It is irreversible reaction. Thermal dissocation is the decomposition of a substance into two or more simpler substances on heating but reaction is reversible.
$\ce{NH_4Cl }\stackrel{\text { Cool }}{\stackrel{\text { Heat }}{\rightleftharpoons}} \ce{NH_3}+ \ce{HCl}$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "[3 Mark Question Answer]" from Chemical Reactions→Chemical Reactions — all question types→CHEMISTRY STD 8 question papers→ICSE Board STD 8 question papers→ICSE Board question paper generator→

Similar questions

Compare the properties of iron $\ce{[II]}$ sulphide with iron $-$ sulphur mixture, considering iron $\ce{[II]}$ sulphide as a compound particles of iron sulphur mixed together as an example of a mixture.

Bring out clearly the difference between following by giving examples:
(a) Material and substance
(b) Homogeneous material and heterogeneous material.

Suggest a suitable technique to separate the constituents of the following mixtures. Also give the reason for selecting the particular method. Calcium carbonate and sodium chloride

Give two applications of chromatography.

Using a burning candle and a jar of hydrogen $–$ how would you prove experimentally that
$(a)$ Hydrogen is a combustible gas
$(b)$ Hydrogen does not support combustion.

Compare the structure of the crystal of diamond $\&$ graphite with special reference to the reason for diamond being the hardest natural substance while graphite one of the softest. Compare the electrical & thermal conductivity of the two crystalline allotropes of carbon.

Explain how each of the following factors affects the formation of a solution $–$
$(a)$ Proportion of the solute & the solvent
$(b)$ Particle size of the solute
$(c)$ Temperature of the solvent

State which of the following terms connected with change of state of matter Le. $–$
$(a)$ Melting
$(b)$ Vaporisation
$(c)$ Condensation
$(d)$ Freezing $–$ pertain to $–$
$(i)$ Conversion of a liquid into a vapour or gas
$(ii)$ Conversion of a liquid into a solid.
$(iii)$ Conversion of a solid into a liquid on heating.

Name the nucleons present within the nucleus of an atom and state their mass and charge

Explain the following types of chemical reactions giving two examples for each of them displacement reaction.