п»ї1. (a)The diagram below symbolizes the industrial fractional distillation of crude oil.
(i)Identify fraction A.
(ii)What home of the jeu allows those to be segregated in the steering column? (2)
(b)A gas oil fraction from the distillation of crude oil contains hydrocarbons inside the C15 to C19 range. These hydrocarbons can be broken by strong heating. (i)Write the molecular formula pertaining to the alkane with nineteen carbon atoms. (ii)Name the type of reaction involved in cracking.
(iii)Write an formula for one conceivable cracking reaction of the alkane C16H34 if the products include ethene and propene inside the molar percentage 2: you and only another compound. (4)
(Total six marks)
installment payments on your A compound of carbon dioxide, hydrogen and nitrogen is made up of 61. 0% of carbon and 12-15. 3% of hydrogen simply by mass. (i)Calculate the scientific formula of the compound.
(ii)What different piece of info is required to consider the molecular formula from the empirical solution? (iii)If the molecular mixture of the substance is the same as the empirical formula, draw two possible set ups of the chemical substance. (Total 6th marks)
3. (a)Compound A (Mr = 215. 8) contains twenty two. 24% carbon dioxide, 3. 71% hydrogen and 74. 05% bromine by simply mass. Show that the molecular formula of A is C4H8Br2. (3)
(b)There happen to be nine structural isomers of molecular formula C4H8Br2, three of which have got branched co2 chains. Provide the names and draw the displayed formulae for any two of the branched chain isomers of C4H8Br2. (4)
(Total 8 marks)
4. The table beneath shows the fractions obtained from crude oil. Identity of small fraction
carbon dioxide atoms
Make use of
bottled energy sources for camping
energy for automobiles
Gas oil (diesel)
(a)Complete the table over by composing in the empty boxes
(b)Give 1 structural formulation in each case intended for the following pieces of crude oil: (i)the isomer of C5H12 with the lowest cooking food point
(ii)a saturated mixture with molecular formula C5H10
(c)Give a molecular formulation for each with the following components of crude oil: (i)the alkane which will, on damage, forms, while the only goods, two moles of ethene and one particular mole of butane every mole of alkane.
(ii)the straight sequence alkane seen in the petrol fraction which will contains the cheapest percentage simply by mass of hydrogen. Label the desk at the start with the question to deduce your answer. (2)
(d)Write an equation for the complete burning of the alkane which requires 11 skin moles of oxygen per mole of alkane for complete combustion. (2)
(Total being unfaithful marks)
5. There are ten structural isomers with the molecular formula C5H11Br. Four of the are classed as major, three while secondary and one as tertiary. The graphical formula of one of the supplementary compounds, isomer A, is shown below.
(i)Give the name of isomer A.
(ii)Explain what is supposed by the term structural isomers.
(iii)Draw the graphical formula of the tertiary chemical substance with molecular formula C5H11Br, isomer B. (1)
(Total 5 marks)
6. (a)Central heating gasoline is acquired by handiwork of crude oil. An alkane present in heating fuel contains 16 carbon dioxide atoms every molecule. Each time a molecule of the alkane is usually cracked, propene is formed. (i)Name the commodity future trading fraction utilized as heating fuel. (ii)Write an formula for the cracking with the 16-carbon alkane to form octane, propene and ethene while the only goods. (iii)Give a single important commercial use of propene.
(b)A catalytic ripping tools in the exhaust system of a car contains a ceramic honeycomb covered which has a thin covering of the catalyst. When hot gases that contain nitrogen monoxide and unburnt octane happen to be passed within the catalyst, that they react to kind nitrogen, carbon and normal water. (i)Explain so why the catalyst is layered on a honeycomb.
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