Question 2 :
Hydrocarbons are the organic compounds that contain the elements _______ and ________.

Question 3 :
The first three members of a homologous series are $CH_4, C_2H_6, C_3H_8$ the fifth member of his series will be: 

Question 6 :
Fullerene, an allotrope of carbon, has 60 carbon atoms joined together and no other element in it. There are various types of fullerenes. $C_{60}, C_{70}, C_{74}$ and $C_{78}$ are the members of the fullerene family. Identify the property due to which such large numbers of carbon atoms are joined together in this molecule :

Question 7 :
A saturated hydrocarbon is shown by ${ C }_{ n }{ H }_{ 20 }$ . The value of $n$ in this compound is:<br/>

Question 9 :
<p class="MsoNormal">Temporary hardness can&#10;be removed by mixing water with slaked lime, this process is known as softening of water.</p>

Question 10 :
Which of the following is not an allotropic form of carbon?

Question 13 :
Chemical&#160;process that converts one member of a homologous series to the next member is called as :<br/>

Question 14 :
The organic compounds having double or triple bond(s) in them are termed as ________________.

Question 16 :
Methane, ethane and propane are said to form a homologous series because all are:<br/>

Question 17 :
Which of the following reagent reacts with ethanoic acid to liberate hydrogen gas?<br/>

Question 21 :
Compounds of carbon and hydrogen which form long chains or branched chains are:

Question 23 :
The phenomenon of existence of an element in more than one physical form is called allotropy.<br/>

Question 24 :
The carbon atoms in diamond are bonded to each other by:

Question 25 :
Which of the following is the true statement for carbon atoms :<br/>

Question 33 :
The most common reactions of homologous series increase the number of :

Question 36 :
The formation of chains by atoms of the same element is known as:

Question 37 :
Which of the following compounds does not contain a multiple bond?

Question 38 :
Water which gives lather with soap easily is called as hard water.<br/>

Question 43 :
<p>Which of the following does not belong to the same homologous series?</p><p>(1) $ C_{4}H_{10} $&#160; (2) $ C_{2}H_{6} $&#160; (3) $ C_{3}H_{8} $&#160; (4) $ C_{4}H_{8} $</p>

Question 44 :
Statement I: Water is a polar molecule.<br/>Statement II:&#160; Water has polar covalent bonds.<br/>

Question 50 :
How many carbon atoms are present in a molecule of nonane?