Question 2 :
The formation of chains by atoms of the same element is known as:

Question 7 :
Hydrocarbons are the organic compounds that contain the elements _______ and ________.

Question 9 :
Which of the following compounds does not contain a multiple bond?

Question 11 :
<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 12 :
Fullerene, an allotrope of carbon, has 60 carbon atoms&#160;joined together and no other element in it. There are&#160;various types of fullerenes. $C_{60}, C_{70}, C_{74}$&#160;and $C_{78}$ are&#160;the members of the fullerene family. Identify the&#160;property due to which such large numbers of carbon&#160;atoms are joined together in this molecule&#160;:

Question 15 :
Which of the following system has maximum number of unpaired electrons?

Question 16 :
Water which gives lather with soap easily is called as hard water.<br/>

Question 17 :
............. don't conduct electricity indicating that they do not form ions

Question 18 :
The organic compounds having double or triple bond(s) in them are termed as ________________.