Fill in the blanks : [5 MARKS]
(i) Members of the alkene series containing ....... to ....... number of carbon atoms are liquids.
(ii) Among isomers, the one with more branched chain has a ...... boiling point.
(iii) The term ....... is used when one carbon atom is attached to four other carbon atoms.
(iv) The molecular mass of any two homologues differs by ....... amu.
(v) The melting point of alkanes increases with ....... in molecular weight.

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Solution

Each Part: 1 Mark

(i) Members of the alkene series containing 5 to 15 number of carbon atoms are liquids.
(ii) Among isomers, the one with more branched chain has a lower boiling point.
(iii) The term neo is used when one carbon atom is attached to four other carbon atoms.
(iv) The molecular mass of any two homologues differs by 14 amu.
(v) The melting point of alkanes increases with increase in molecular weight.

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Similar questions

Q. (a) Give the general formula of alkanes. Write the name, structural formula and physical state of the compound containing:
(i) 3 carbon atoms
(ii) 8 carbon atoms

(b) Which of the compounds named in (a) would show :
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(ii) Higher melting point
(iii) Higher density
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(c) By how many carbon atoms and hydrogen atoms do any two adjacent homologues differ?

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Q. The molecules of the alkene family are represented by a general formula C_nH_2n. Answer the following:
(i) What do n and 2n signify?
(ii) What is the name of alkene when n = 4?
(iii) What is the molecular formula of the alkene, if there are six hydrogen atoms in it?
(iv) Write the molecular and structural formula of the first member of alkene family.
(v) Write the molecular formulae of lower and higher homologues of an alkene which contains four carbon atoms.

Which of the following statement(s) is/are correct about carbon compounds?

(i) Carbon has the ability to form covalent bonds with other atoms of carbon giving rise to a large number of molecules through a self-linking property.

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(iii) Carbon compounds are highly unstable compounds.

(iv) Carbon compounds have low melting and boiling points.

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