a) Which we compounds belong to the same homologous series?
b)Which compound belongs to the same homologous series as ethanol?
c)Which compound on hydrogenation produces E
d)Which compound when dissolved in water tums blue litmus red?
e)What will be the compound formed by reaction of 'B' with D'? Write the chemical reaction.
Answers
Answer:
compound d is methanol
and compound c is but-2-ene
e is butane.
compound c ka hydrogenation hoga
a) Compound 'A' and compound 'C' belong to the same homologous series alkenes.a) Compound 'A' and compound 'C' belong to the same homologous series of alkenes.
b) Compound 'D' belongs to the same homologous series as ethanol.
c) Compound 'C' on hydrogenation produces compound 'E'.
d) Compound 'B', when dissolved in water, turns blue litmus red.
e) The compound formed by the reaction of 'B' with D' is methyl ethanoate.
(a) • A homologous series is a group of organic compounds having the same general formula and the same functional group. For example - In case of alkenes, which have no functional group, the general chemical formula for all alkanes is CnH₂ₙ. All alkenes are, therefore, homologous to each other.
• In the given question, compound 'A' has a molecular formula of C₂H₄ and is ethene. Compound 'C' has a molecular formula of C₄H₈ and is butene.
• Ethene and butene, both belong to the alkene family, and butene, having more carbon atoms, is a senior homologue to ethene. Therefore, 'A' and 'C' are homologous to each other.
(b) Compound 'D' given in the question is methanol as it has a molecular formula of CH₃OH. Methanol and ethanol, both belong to the alcohol family, and thus, are homologous to each other.
(c) Compound 'C' is butene (C₂H₄), and compound 'E' is butane (C₄H₁₀0). We know that hydrogenation of an alkene produces the corresponding alkane. Therefore, hydrogenation of butene (C) produces butane (E).
(d) • Compound 'B' has the molecular formula of CH₃COOH. Since the functional group COOH is present in the compound, it is an acid, called the ethanoic acid.
• It is the characteristic property of an acid to turn moist blue litmus paper red. Therefore, compound 'B', when dissolved in water, turns blue litmus red.
(e) • The reaction between an acid and an alcohol forms an ester having the general formula RCOOR', where R and R' are alkyl or aryl groups.
• As stated earlier, compound 'B' is ethanoic acid, and compound 'D' is methanol. The reaction between the two proceeds as follows :
CH₃COOH + CH₃OH + H+/heat → CH₃COOCH₃ + H₂O
• Therefore, the product formed by the reaction between the compound 'B' and the compound 'D' is methyl ethanoate.