List of top Science Questions on Chemical Properties Of Carbon Compounds asked in CBSE Class X

(a) (i)Give reason why carbon can neither form C4+ cations nor C4− anions but form covalent compounds.
(ii) What is homologous series of carbon compound? Write the molecular formula of any two consecutive members of homologous series of aldehydes.
(iii) Draw the structure of the molecule of cyclohexane (C6H12).
OR
(b) (i) Name a commercially important carbon compound having functional group –OH and write its molecular formula. (ii) Write chemical equation to show its reaction with
(1) Sodium metal
(2) Excess conc. sulphuric acid
(3) Ethanoic acid in the presence of an acid catalyst
(4) Acidified potassium dichromate
Also write the name of the product formed in each case.
Consider the following statements about homologous series of carbon compounds:
(a) All succeeding members differ by –CH2 unit.
(b) Melting point and boiling point increases with increasing molecular mass.
(c) The difference in molecular masses between two successive members is 16 u.
(d) C2H2 and C3H4 are NOT the successive members of alkyne series.
The correct statements are –
Carbon compounds :
(i) are good conductors of electricity.
(ii) are bad conductors of electricity.
(iii) have strong forces of attraction between their molecules.
(iv) have weak forces of attraction between their molecules.
The correct statements are :
More than three million carbon compounds have been discovered in the field of chemistry. The diversity of these compounds is due to the capacity of carbon atoms for bonding with one another as well as with other atoms. Most of the carbon compounds are poor conductors of electricity and have low melting and boiling points.

Explain the mechanism of the cleaning action of soaps.

Give a test that can be used to differentiate between saturated and unsaturated hydrocarbons

Which of the following hydrocarbons undergo addition reactions: C2H6 , C3H8 , C3H6 , C2H2 and CH4 .

What is hydrogenation? What is its industrial application?

What change will you observe if you test soap with litmus paper (red and blue)?

Explain the formation of scum when hard water is treated with soap.

Why are carbon and its compounds used as fuels for most applications?

Why does micelle formation take place when soap is added to water? Will a micelle be formed in other solvents such as ethanol also?

How can ethanol and ethanoic acid be differentiated on the basis of their physical and chemical properties?

What is an homologous series? Explain with an example.

Draw the electron dot structures for 
(a) ethanoic acid. 
(b) H2S. 
(c) propanone. 
(d) F2

Explain the nature of the covalent bond using the bond formation in CH3Cl.

While cooking, if the bottom of the vessel is getting blackened on the outside, it means that

Butanone is a four-carbon compound with the functional group

Ethane, with the molecular formula C2H6 has