Ethane, with the molecular formula C₂H₆ has

1

(a)

6 covalent bonds

(b)

7 covalent bonds

(c)

8 covalent bonds

(d)

9 covalent bonds

Butanone is a four-carbon compound with the functional group

1

(a)

carboxylic acid

(b)

aldehyde

(c)

ketone

(d)

alcohol

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

1

(a)

the food is not cooked completely.

(b)

the fuel is not burning completely.

(c)

the fuel is wet.

(d)

the fuel is burning completely.

Carbon exists in the atmosphere in the form of

1

(a)

carbon monoxide only

(b)

carbon monoxide in traces and carbon dioxide

(c)

carbon dioxide only

(d)

coal

Which of the following statements are usually correct for carbon compounds? These
i) are good conductors of electricity
ii) are poor conductors of electricity
iii) have strong forces of attraction between their molecules
iv) do not have strong forces of attraction between their molecules

1

(a)

(i) and (iii)

(b)

(ii) and (iii)

(c)

(i) and (iv)

(d)

(ii) and (iv)

What is the difference in the molecular formula of any two consecutive members of a homologous series of organic compounds?

1

(a)

-CH₂ - is the difference in the molecular formula of any two consecutive members of a homologous series of organic compounds.

Name the carbon compound which on heating with excess of concentrated sulphuric acid at 443 K gives ethene.

1

(a)

CH₃CH₂OH, ethanol

What is a homologous series of carbon compounds? 

1

(a)

A homologous series is the family of organic compound having the same functional group, and the successive (adjacent) members of which differ by CH₂ unit or 14 mass unit

Write the name and molecular formula of the first member of the homologous series of alkynes

1

(a)

Ethyne, C₂H₂

Write the name and formula of the 2ndmember of homologous series having general formula CnH_2n-2

1

(a)

Propyne C₃H₄