Give the molecular formula of decane.
Propene can be made by using heat to decompose large alkane molecules into smaller, more useful molecules. This process is known as:
combustion
cracking
fractional distillation
polymerisation
Molecules of propene can be combined to form a molecule of poly(propene). Which of these shows part of the structure of a molecule of poly(propene)? [5CH1H_01_que_20150514]
A
B
C
D
In the following diagrams, X and Y are atoms of different elements. Which diagram correctly shows the arrangement of outer electrons in a molecule of methane? [0620_w15_qp_13 Q4]
The diagram shows the flame produced from burning a hydrocarbon, acetylene, in a welding torch. Which gas is X? [0620_w15_qp_13 Q28]
hydrogen
methane
nitrogen
oxygen
Carbon monoxide is an air pollutant produced when petrol is burned in a car engine. Why is carbon monoxide considered to be an air pollutant?
It causes climate change.
It causes the corrosion of buildings.
It is a significant greenhouse gas.
It is poisonous.
Unwanted vegetation is sometimes placed in a bin where it decays to form compost. This compost can be used to fertilise soils. Which gas is likely to be present in a higher percentage inside the bin than in the air outside the bin?
carbon monoxide
sulfur dioxide
What are the names of the compounds shown in the reaction scheme at the left? [0620_w15_qp_13 Q35]
Which row describes the formation of a polymer? [0620_w15_qp_13 Q36]
Which row shows the correct use of a fraction obtained by the fractional distillation of petroleum? [0620_w15_qp_13 Q37]
Ethanol can be formed by: 1 fermentation 2 reaction between steam and ethene
Which of these processes uses a catalyst? [0620_w15_qp_13 Q38]
The structures of four compounds are shown. Which are members of the same homologous series? [0620_w15_qp_13 Q39]
W, X, Y and Z
W and X only
W, Y and Z only
X and Z only
During the process of cracking hydrocarbons, an ❌ is converted into an ❌ . The presence of an ....... 3 ....... can be shown by a visible reaction with .❌ .