Calderglen High School 123456789 101112131415161718 19202122232425 26.

Calderglen High School

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1 Give the name beginning of the hydrocarbons with 1 to 8 carbons

answer

DON’T NEED TO MEMORISE!!LOOK IN THE DATA BOOK!!!!1 = meth 5 = pent2 = eth 6 = hex3 = prop 7 = hept4 = but 8 = oct


•A compounds containing Carbon, Hydrogen and Oxygen.

•Hydrogen and Oxygen have a 2:1 ratio

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2 What is a CARBOHYDRATE?


What are SATURATED hydrocarbons?

Hydrocarbons where all the carbon to carbon bonds are SINGLE covalent

bonds

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3


Give some uses for CARBOHYDRATES?

1. Food2. For making Fuels

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4


What is the formula for

Glucose ?

C6H12O6

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5


What is STARCH and how is it made?

•A complex carbohydrate•Made when many Glucose molecules join together (polymerise)

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6


What is the test for Starch?

Iodine solution turns blue/black

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7


When CRUDE OIL is distilled what is the problem concerning the amounts of fractions obtained?

•There are not enough of the useful short chain fractions

• It is mainly the long chain hydrocarbons that are obtained

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8


What is the connection between the boiling point of alkanes and

their number of carbons?

Boiling point increases as the number of carbons

increases

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9


What is the word equation for the combustion of alkanes?

alkane + oxygen carbon dioxide + water

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10


Give examples of uses for ALKANES

Methane – natural

gas

Propane – bottled

gas

Octane – petrol

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11


What is the test for GLUCOSE?

Benedict’s solution turns orange/red

(when heated)

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12


Why do plants make STARCH?

They make starch from

glucose to store energy

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13


What are UNSATURATED hydrocarbons?

Hydrocarbons where there is at least one

carbon to carbon DOUBLE covalent bond

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14


How is starch broken down?

Starch is broken down during digestion in the body.

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15


Which carbohydrate can pass through the gut wall into the bloodstream?

GLUCOSE (small, soluble molecule)

(starch is large and insoluble – can’t pass across gut wall)

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16


Which process breaks down glucose for energy?

RESPIRATION

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17


What do alkanes, alkenes and cycloalkanes have in

common ?

They are all hydrocarbons so burn in a plentiful supply

of air to produce carbon dioxide and water

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18


Which homologous series has single C-C bonds?

ALKANES

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19


Which homologous series has C=C bonds?

ALKENES

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20


What type of bonding exists in ALKANES?

Saturated (C-C)

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21


What is catalytic cracking?

A process for breaking long chain molecules into

smaller more useful molecules

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22


How is catalytic cracking carried out?

By heating in the presence of a catalyst eg aluminium oxide.

The catalyst speeds up the process and allows it to take place at a lower temperature

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23


What is the main use for the small unsaturated molecules (eg ethene)

obtained by the cracking of long chain hydrocarbons?

Small unsaturated molecules are used to

make plastics

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24


Apart from the product molecules being smaller, what is different about

one of the products obtained in cracking?

•One will be saturated (C-C)•One will be unsaturated (C=C)

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25


What type of bonding exists in ALKENES?

Unsaturated (C=C)

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Calderglen High School 123456789 101112131415161718 19202122232425 26.

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