Question 5 :
Given compounds: propyne, acetylene, butane, butanol, propene, ethane, and ethene. How many of these compounds are unsaturated?

Question 7 :
<p><span>$ N{ a }_{ 2 }C{ O }_{ 3 }+2C{ H }_{ 3 }COOH\longrightarrow $&#160;</span><br/></p><p>Which gas is produced in this reaction?</p>

Question 8 :
Identify the unsaturated compounds from the following :<br/><span>$(i)$ Propane&#160; &#160; &#160; $(ii)$ Propene&#160; &#160; &#160; $(iii)$ Propyne&#160; &#160; &#160; $(iv)$ 2-Chloropropane</span>

Question 10 :
At standard conditions, X has an allotropic form that is a good electrical conductor. Identify X?

Question 11 :
Following are the uses of a substance.<div><br/><span>(i) It is used as an abrasive for cutting glass.</span><div><br/>(ii) It is used as a tip of deep boring drills.</div><div><br/>(iii) It is used for making dies for drawing wires.</div><div><br/>(iv) It is used in generating laser beams in electronics.</div><div><br/><div>What is the name of this substance?</div></div></div>

Question 14 :
The ratio of the difference between number of hydrogens present in 'propane and propyne' and 'propane and propene' is:

Question 15 :
Identify the substance which is:<br/>(i) Used in making leads of pencils.<br/>(ii) Used as a dry lubricant.<br/>(iii) Used in making black paint and printers ink.<br/>(iv) Used in nuclear reactors as a moderator.

Question 16 :
A five carbon chain with a double bond would be named :

Question 19 :
An allotropic form of carbon used for cutting&#160;and drilling is :

Question 21 :
The most common fullerene is $C_{60}$. 60 carbon atoms are arranged in ______ pentagons and ______ hexagons.<br/>

Question 22 :
The main reasons for the huge number of organic compounds are :<br/>

Question 23 :
In the presence of concentrated sulphuric acid $(H_2SO_4)$, acetic acid reacts with ethyl alcohol to produce :

Question 24 :
In the Earth's crust, Carbon is found in the form of_________.

Question 25 :
In nomenclature of carbon compounds, functional group can be written as __________ .

Question 29 :
Which of the following statement is true for graphite?<div>(a) In graphite, each carbon atom is bonded to four other carbon atoms.<br/>(b) Graphite is very hard.<br/>(c) It is a good conductor of electricity.<br/>(d) It is a bad conductor of electricity.</div>

Question 30 :
The number of oxygen molecules used in the combustion of $1$ molecule of ethanol is?<br/>

Question 31 :
<p>$ NaOH+{ C }{ H }_{ 3 }COOH\longrightarrow C{ H }_{ 3 }COONa+{ H }_{ 2 }O $</p><p>This reaction is called :&#160;</p>

Question 33 :
How many elements of unsaturation does a molecule with the chemical formula $C_5H_8$ have?

Question 34 :
An organic compound 'A' produces a gas with brisk effervescence when sodium bicarbonate is added to it. The compound 'A' contains the same number of carbons as in ethane. The compound 'A' reacts with ethanol to form a sweet-smelling compound 'C' in presence of conc. $H_2SO_4$ acid. Then the name of compound A and the gas evolved is :

Question 38 :
An organic compound 'A' produces a gas with brisk&#160;effervescence when sodium bicarbonate is added to it.&#160;The compound 'A' contains same number of carbons&#160;as in ethane. The compound 'A' reacts with ethanol to&#160;form a sweet smelling compound 'C' in presence of&#160;conc. $H_2SO_4$. A and C respectively are :

Question 40 :
Assertion: When a hydrocarbon is combusted in air, carbon monoxide is always the major product.<br/>Reason: Air contains much more nitrogen than oxygen.