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    • Thread Starter

    Which of the following phrases or words do not describe the compound pentane?
    Choose at least one answer.
    a. Alkane
    b. Alkene
    c. Hydrocarbon
    d. Saturated
    e. Isomer of 2-methylpropane

    Question 2
    Marks: --/1
    The boiling points for methane, ethane and propane are -162oC, -89oC and -42oC respectively.

    How can this trend be explained?

    Choose one answer.
    a. Boiling point increases because the surface area decreases
    b. Boiling point increases with the size of the molecule because the number of electrons increases
    c. Boiling point increases because molecules are heavier
    d. Boiling point increases with the size of the molecule because there are more covalent bonds

    Question 3
    Marks: --/1
    Which of these is not a physical property of alkanes?

    Choose one answer.
    a. They are soluble in water
    b. They float in water
    c. Short chain ones dissolve in ethanol
    d. They have relatively low boiling point

    Question 4
    Marks: --/1
    Which of these statement(s) does not apply to the reaction of alkanes with halogens?

    Choose at least one answer.
    a. It produces just one product
    b. It involves free radicals
    c. It involves heterolytic fission
    d. It involves homolytic fission
    e. It is a chain reaction

    Question 5
    Marks: --/1
    How many different alkenes share the molecular formula C4H8?
    Choose one answer.
    a. 3
    b. 5
    c. 4
    d. 2
    Question 6
    Marks: --/1
    When an alkene reacts with chlorine to produce a disubstituted chlorinated alkane, what type of reaction is it?
    Choose one answer.
    a. Free-radical substitution
    b. Homolytic fission
    c. Elimination
    d. Electrophilic addition

    Question 8
    Marks: --/1
    Which one of the following is a correct statement about the two alkenes CH3CH2CH=CH2 and CH3CH=CHCH3 ?

    Choose one answer.
    a. Neither exhibits E/Z isomerism
    b. Neither may be polymerised
    c. Neither reacts with hydrogen to form butane
    d. Neither reacts with bromine to give 1,4-dibromobutane

    Question 9
    Marks: --/1
    The alkene 2-methylbut-2-ene can react with Cl2 to produce a chlorinated alkane. What is the name of this product?
    Choose one answer.
    a. 2-chloro-2-methylbutane
    b. 2-methyl-2,3-chlorobutane
    c. 2-methyl-2,3-dichlorobutane
    d. 2-chloro-3-methylbutane

    Question 10
    Marks: --/1
    The right conditions for the addition of water to ethene to produce ethanol are:

    Choose one answer.
    a. Steam, heat and phosphoric acid
    b. Nickel catalyst
    c. Concentrated sulphuric acid
    d. Standard conditions

    Question 11
    Marks: --/1
    When an alkene reacts with hydrogen in the presence of a nickel catalyst, what compound results from this reaction?

    Choose one answer.
    a. an aldehyde
    b. an alkane
    c. an ester
    d. a cycloalkane

    Question 12
    Marks: --/1
    When steam reacts with an alkene to form an alcohol, the type of reaction and the mechenism are called:

    Choose one answer.
    a. Free radical substitution
    b. Esterification
    c. Electrophilic addition
    d. Dehydration

    Question 13
    Marks: --/1
    Which of these does not make an organic compound a good fuel?
    Choose at least one answer.
    a. It is relatively easy to store and transport
    b. It can be ignited relatively easily
    c. Its enthalpy change of combustion is relatively high
    d. It is readily available
    e. It ignites spontanously

    Question 14
    Marks: --/1
    An (unbalanced) equation for the combustion of propan-1-ol is shown:

    C3H8O + O2 → CO2 + H2O

    To balance the equation, the following numbers have to be put in front of the 4 substances involved respectively:

    Choose one answer.
    a. 1, 3.5, 3 and 4
    b. 1, 5, 3 and 4
    c. 1, 4, 3 and 4
    d. 1, 4.5, 3 and 4

    Question 15
    Marks: --/1
    Which of these describes ethane and ethene correctly?
    Choose one answer.
    a. Both can be polymerised readily
    b. Both can undergo addition reactions
    c. Both are unsaturated hydrocarbons
    d. Both can burn in oxygen to produce carbon dioxide and water

    Question 16
    Marks: --/1
    Ethene reacts with steam in the presence of phospohoric acid as a catalyst and at a tempeature of 300oC to form a product called
    Choose one answer.
    a. ethanoic acid
    b. ethyl ethanoate
    c. ethanol
    d. ethane

    Question 17
    Marks: --/1
    The process by which ethene is converted to ethane is known as
    Choose one answer.
    a. oxidation
    b. addition
    c. cracking
    d. hydration

    Question 18
    Marks: --/1
    The equation for the complete combustion of
    propane is: C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(l)
    30cm3 of propane is mixed with 200cm3 of oxygen and the mixture is ignited. What is the volume in cm3 of the resulting gas mixture? (All volumes are measured at the same temperature and pressure.)
    Choose one answer.
    a. 120
    b. 210
    c. 140
    d. 90

    Question 19
    Marks: --/1
    How many dichlorinated isomers can be formed by the halogenation of CH3CH2CH2CH3 with Cl2 in the presence of UV light?
    Choose one answer.
    a. 2
    b. 6
    c. 5
    d. 3

    Question 20
    Marks: --/1
    What is the correct name for the following compound:
    Choose one answer.
    a. butane
    b. ethane
    c. hexane
    d. methane
    e. pentane

    Question 21
    Marks: --/1
    Which of these pairs of substances react to give bromoethane as the only product?
    Choose one answer.
    a. ethene and hydrogen bromide
    b. ethane and bromine
    c. ethane and hydrogen bromide
    d. ethene and bromine

    Question 24
    Marks: --/1
    Which of these is not a combination of products that you could get from cracking dodecane?

    Note: you must take into account the number of molecules of products.

    Choose at least one answer.
    a. C2H6 + 2C5H12
    b. C4H10 + 2C4H10
    c. C4H10 + 2C4H8
    d. C5H12 + C7H14
    e. C2H6 + 2C5H10

    Question 25
    Marks: --/1
    Given the following compounds:

    1.CH2-CH2 2.CH3-CH2OH 3.CH3-CHO 4.H2O

    The correct order of volatility (putting the most volatile compound first) is

    Choose one answer.
    a. 4,2,3,1
    b. 3,1,2,4
    c. 1,2,3,4
    d. 1,3,2,4
    e. 4,3,2,1
    Question 26

    Marks: --/1
    Ethane reacts with chlorine when the substances are exposed to UV radiation. The equation for this reaction is

    Choose one answer.
    a. C2H4 + Cl2 → C2H4Cl2
    b. C2H6 + Cl2 → C2H4Cl2 + H2
    c. C2H6 + Cl2 → 2CH3Cl
    d. C2H6 + Cl2 → C2H5Cl + HCl

    (Original post by NAtHaN12345)
    Are you expecting solutions?
    That's against forum rules and both a waste of my time and yours. . .
    • Thread Starter

    No, sorry. I didn't put a information bar.
    Basically I would like some information about the main points in each of these because these are the few of the questions I got in my mock. And to improve, I want useful tips/information to help me remember
Have you ever experienced racism/sexism at uni?

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