Question 2 :
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 3 :
Which of the following pairs are members of a Homologous series?

Question 4 :
Which of the following statements is/are incorrect for diamond?<br/>(a)&#160;The refractive index of diamond is highest among solids.<br/>(b)&#160;Diamond is hard because all the valence electrons of each carbon atom are involved in bond formation.<br/>(c) Diamond is thermodynamically more stable than graphite.<br/>(d)&#160;One carat of diamond represents its&#160;weight.

Question 7 :
Which of the following is not an allotropic form of carbon?

Question 8 :
The organic compounds having double or triple bond(s) in them are termed as ________________.

Question 9 :
<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 18 :
Which of the following compounds does not contain a multiple bond?

Question 20 :
Compounds within a homologous series typically have a fixed set of :

Question 21 :
Which of the following is the true statement for carbon atoms :<br/>

Question 22 :
The phenomenon of existence of an element in more than one physical form is called allotropy.<br/>

Question 23 :
The carbon atoms in diamond are bonded to each other by:

Question 25 :
When 2 hydrogen atoms combine to form $H_2$ molecule, the system ______ .

Question 26 :
<p>Which out of the following has smell similar to that of vinegar?</p>

Question 29 :
A saturated hydrocarbon is shown by ${ C }_{ n }{ H }_{ 20 }$ . The value of $n$ in this compound is:<br/>

Question 31 :
Statement I: Water is a polar molecule.<br/>Statement II:&#160; Water has polar covalent bonds.<br/>

Question 32 :
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:&#160;

Question 37 :
Hydrocarbons are the organic compounds that contain the elements _______ and ________.

Question 40 :
Chemical&#160;process that converts one member of a homologous series to the next member is called as :<br/>

Question 41 :
Observe the following pairs of organic compounds:<br/>(I) $C_{4}H_{9}OH$ and $C_{5}H_{11} OH$<br/>(II) $C_{7}H_{15}OH$ and $C_{5}H_{11} OH$<br/>(III) $C_{6}H_{13}OH$ and $C_{3}H_{7}OH$<br/>Which of these pairs is a homologous series according to increasing order of carbon atom?<br/>

Question 42 :
Methane, ethane and propane are said to form a homologous series because all are:<br/>

Question 45 :
Which of the following reagent reacts with ethanoic acid to liberate hydrogen gas?<br/>

Question 46 :
............. don't conduct electricity indicating that they do not form ions

Question 49 :
Compounds of carbon and hydrogen which form long chains or branched chains are: