Hydrocarbons

Which compound may be synthesised from an alkene, with formula $\text{C}_4\text{H}_8$, by an addition reaction?

Options

A   1,1-dibromobutane
B   1,2-dibromobutane
C   1,3-dibromobutane
D   1,3-dibromomethylpropane

Propan-2-ol can be converted into 2-chloropropane using reagent M followed by reagent N.

Which row is correct?

Options

A molecule of hexane can be cracked in a number of different ways.

Three compounds are listed.

1 $\text{C}_3\text{H}_8$
2 $\text{C}_4\text{H}_8$
3 $\text{C}_5\text{H}_{12}$

Which compounds are found in the mixture of products from the cracking of hexane molecules?

Options

A   1, 2 and 3
B   1 and 2 only
C   1 and 3 only
D   2 and 3 only

An alkene P reacts with an excess of hot concentrated acidified $\text{KMnO}_4(\text{aq})$.

Methylpropanoic acid is the only organic product.

What is alkene P?

Options

A   2,5-dimethylhex-3-ene
B   2-methylbut-2-ene
C   methylpropene
D   oct-4-ene, $\text{C}_8\text{H}_{16}$

Three substances are listed.

1. butane
2. hydrogen
3. hydrogen bromide

Which substances are possible products of the free-radical substitution reaction between ethane and bromine?

Options

A   1, 2 and 3
B   1 and 2 only
C   1 and 3 only
D   2 and 3 only

Samples of the gases $\text{CH}_3\text{Cl}$ and $\text{Cl}_2$ are mixed together and irradiated with ultraviolet light.

Which compound is produced by a termination step in the reaction?

Options

A   $\text{HCl}$
B   $\text{CH}_2=\text{CH}_2$
C   $\text{CH}_2\text{ClCH}_2\text{Cl}$
D   $\text{H}_2$

Propan-1-ol, $\text{C}_3\text{H}_7\text{OH}$, is dehydrated by passing its vapour over hot aluminium oxide to give a hydrocarbon.

Which structural formula represents the product obtained when the hydrocarbon reacts with bromine?

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Alkane S has molecular formula $\text{C}_4\text{H}_{10}$.

S reacts with $\text{Cl}_2(\text{g})$ in the presence of sunlight to produce only two different monochloroalkanes, $\text{C}_4\text{H}_9\text{Cl}$. Both of these monochloroalkanes are treated with hot ethanolic $\text{KOH}$. They both produce the same alkene T, and no other organic products.

What is produced when T is treated with hot concentrated acidified $\text{KMnO}_4$?

Options

A   $\text{CO}_2$ and $\text{CH}_3\text{CH}_2\text{CO}_2\text{H}$
B   $\text{CO}_2$ and $\text{CH}_3\text{COCH}_3$
C   $\text{HCO}_2\text{H}$ and $\text{CH}_3\text{COCH}_3$
D   $\text{CH}_3\text{CO}_2\text{H}$ only

Which row shows the products formed when cyclohexene reacts with acidified $\text{KMnO}_4$ under different conditions?

Options

When 0.010 mol of a hydrocarbon X reacts with 720 cm³ of hydrogen at room conditions, an alkane is formed.

What is hydrocarbon X?

Options