
Concept explainers
(a)
Interpretation:
1-butene has one triple bond has to be indicated as true or false.
(a)

Explanation of Solution
1-butene is an
From the above structure it is found that 1-butene contains only a double bond and not a triple bond. Hence, the given statement is false.
(b)
Interpretation:
1-butene has lower melting point than ethene has to be indicated as true or false.
(b)

Explanation of Solution
1-butene contains four carbon atoms and eight hydrogen atoms. Ethene contains two carbon atoms and four hydrogen atoms. As the molar mass increases, the London Dispersion forces become stronger and as a result melting and boiling points will also increase. Hence, ethene will have lower melting point than 1-butene. Therefore, the given statement is false.
(c)
Interpretation:
1-butene is an unsaturated hydrocarbon has to be indicated as true or false.
(c)

Explanation of Solution
Structure of 1-butene can be given as,
A double bond is present between two carbon atoms in the structure of 1-butene. Therefore, 1-butene is an unsaturated hydrocarbon. Hence, the given statement is true.
(d)
Interpretation:
1-butene is polar has to be indicated as true or false.
(d)

Explanation of Solution
1-butene contains four carbon atoms and eight hydrogen atoms. The structure of 1-butene can be given as,
Pentane contains only carbon and hydrogen atom. Therefore, this is a nonpolar molecule only. Given statement is false.
(e)
Interpretation:
Molecular formula of 1-butene is
(e)

Explanation of Solution
1-butene contains four carbon atoms and eight hydrogen atoms. The molecular formula of 1-butene is
(f)
Interpretation:
1-butene is a liquid at room temperature has to be indicated as true or false.
(f)

Explanation of Solution
(g)
Interpretation:
Molar mass of 1-butene is
(g)

Explanation of Solution
Molecular formula of 1-butene is
Therefore, molar mass of 1-butene is
(h)
Interpretation:
Ionic bonding is present in 1-butene has to be indicated as true or false.
(h)

Explanation of Solution
1-butene is an organic compound. It contains only hydrogen and carbon atoms. Therefore, the bonds present between the atoms in 1-butene are covalent bonds only and not ionic bonds. Hence, the given statement is false.
(i)
Interpretation:
Ionic bonding is flammable has to be indicated as true or false.
(i)

Explanation of Solution
1-butene is an organic compound. All the hydrocarbons are flammable. Hence, 1-butene is also flammable because it contains only carbon and hydrogen atoms. The given statement is true.
(j)
Interpretation:
(j)

Explanation of Solution
1-butene is an organic compound. Structure of 1-butene can be given as,
This do not contain hydroxyl group as its functional group. It contains double bond as its functional group. Hence, the given statement is false.
(k)
Interpretation:
1-butene is an aliphatic hydrocarbon has to be indicated as true or false.
(k)

Explanation of Solution
1-butene is an organic compound. Structure of 1-butene can be given as,
1-butene do not contain any ring structure. It contains only carbon and hydrogen atoms. Therefore, 1-butene is an aliphatic hydrocarbon. The given statement is true.
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