(a) Draw the structural formula of a compound with two carbon atoms in each of the following cases:
(i) An alkane with a carbon to carbon single bond.
(ii) An alcohol containing two carbon atoms.
(iii) An unsaturated hydrocarbon with a carbon to carbon triple bond.

(b) Ethane, Ethene, Ethanoic acid, Ethyne, Ethanol
From the compounds given above, name:
(i) The compound with —OH as a part of its structure.
(ii) The compound with —COOH as a part of its structure.
(iii) Homologue of Homologous series with general formula C_nH_2n.

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Solution

(a) The structural formula of a compound with two carbon atoms in each of the following cases are:

Case Name of Compound Molecular Formula Structural Formula

(i) An alkane with a carbon to carbon single bond. Ethane C₂H₆

(ii) An alcohol containing two carbon atoms. Ethanol C₂H₅OH

(iii) An unsaturated hydrocarbon with a carbon to carbon triple bond. Ethyne C₂H₂ $HC \equiv CH$

(b)(i) The compound with —OH as a part of its structure is ethanol.
(ii) The compound with —COOH as a part of its structure is ethanoic acid.
(iii) Homologue of Homologous series with general formula C_nH_2n is ethene.

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Similar questions

Ethane, Ethene, Ethanoic acid, Ethyne, Ethanol

From the above, name
(a) The compound with –OH as the part of its structure,
(b) The compound with –COOH as the part of its structure.
(c) Homologue of homologous series with general formula $C_{n} H_{2 n}$ .

(a) Define a homologous series. Give the name and structural formula of one homologue of the following :
$C H_{3} O H$
(b) Write the molecular formula of the third member of the homologous series of carbon compounds with general formula $C_{n} H_{2 n + 1} O H .$
(c) Name any two fossil fuels.

Q. Fill in the following blanks with suitable words :
(a) The form of carbon which is known as black lead is ___
(b) The form of carbon which is used as a lubricant at high temperature is ___
(c) Compounds of carbon with hydrogen alone are called ___
(d)

C_{n} H_{2 n}

is the general formula of ___ hydrocarbons.
(e) Hydrocarbons having the general formula

C_{n} H_{2 n - 2}

are called ___
(f) Ethene and ethyne are examples of ___ hydrocarbons.
(g) Ethyne has ___ carbon-hydrogen single bonds.
(h) Carbon compounds have usually ___ melting points and boiling points because they are ___ in nature.
(i) The property of carbon atoms to form long chains in compounds is called ___
(j) The general formula

C_{n} H_{2 n}

for cycloalkanes is the same as that of ___
(k) The IUPAC name of ethylene is ___
(l) The IUPAC name of acetylene is ___

Q. Assertion :The ability of carbon to form chains gives rise to a homologous series of compounds. Reason: Homologous series is a series of compounds with the same general formula, usually varying by a single parameter such as the length of a carbon chain

Q. Fill in the following blanks with suitable words:
(a) The form of carbon which is known as black lead is ...........
(b) The form of carbon which is used as a lubricant at high temperature is .........
(c) Compounds of carbon with hydrogen alone are called ..........
(d) C_nH_2n is the general formula of .......... hydrocarbons.
(e) Hydrocarbons having the general formula C_nH_2n−2 are called ..........
(f) Ethene and ethyne are examples of ..... hydrocarbons.
(g) Ethyne has ......... carbon-hydrogen single bonds.
(h) Carbon compounds have usually ... melting points and boiling points because they are ...... in nature.
(i) The property of carbon atoms to form long chains in compounds is called ...........
(j) The general formula C_nH_2n for cycloalkanes is the same as that of ...........
(k) The IUPAC name of ethylene is .........
(l) The IUPAC name of acetylene is ............

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	Case	Name of Compound	Molecular Formula	Structural Formula
(i)	An alkane with a carbon to carbon single bond.	Ethane	C₂H₆
(ii)	An alcohol containing two carbon atoms.	Ethanol	C₂H₅OH
(iii)	An unsaturated hydrocarbon with a carbon to carbon triple bond.	Ethyne	C₂H₂	$HC \equiv CH$