(i) Carbon cannot form C^4+ cation and C^4- anion. Explain. (ii) Define homologous series of carbon compounds. Why are the melting and boiling points of C_4H_{10} higher than C_3H_8 or C_2H_6? (iii) What happens when ethanol is heated with acidified potassium dichromate?
Homologous series
Usually 3 marks a paper · mostly long answers · asked in 2 of the last papers
Notes are being written
The board questions below are real and complete — they come from the CBSE papers themselves. The written notes for this topic are still being prepared.
Board questions on this topic
2 from the CBSE papers we hold — the exact wording the board used.
(i) Define a homologous series of carbon compounds. (ii) Why is the melting and boiling points of C_4H_8 higher than that of C_3H_6 or C_2H_4? (iii) Why do we NOT see any gradation in chemical properties of a homologous series compounds? (iv) Write the name and structures of (i) aldehyde and (ii) ketone with molecular form C_3H_6O.