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Nat 5 Chem > unit 2 basics > Flashcards

unit 2 basics Flashcards

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1
Q

What can be released when a fuel is burned

A

Energy

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2
Q

What is an alternative to fuel or petrol

A

Hydrogen

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3
Q

why can using hydrogen be an advantage to the environment

A

Hydrogen is renewable
doesnt produse carbon dioxide

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4
Q

what are the only two elements that a hydrocarbon contains

A

Hydrogen and carbon

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5
Q

what is an homologous series

A

family of compounds with the same general formula and similar chemical properties

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6
Q

what is the molecular formula for Alkanes

A

CnH2n+2

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7
Q

what is the molecular formula for cycloalkanes

A

CnH2n

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8
Q

what are alkanes and cycloalkanes described as (saturated or unsaturated)

A

Saturated

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9
Q

why are alkanes and cycloalkanes described as saturated or unsaturated

A

because they usually contain carbon to carbon single bonds

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10
Q

what is the molecular formula for alkenes

A

CnH2n

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11
Q

are alkenes saturated or unsaturated

A

unsaturated

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12
Q

whya are alkenes unsaturated

A

because they contain carbon to carbon double bonds

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13
Q

What happens to the intermolecular forces when the number of carbons increase

A

it increases

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14
Q

What sources carbohydates and oils

A

Plants

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15
Q

what can carbohydrates be used for

A

food or fuel

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16
Q

what do carbohydrates contain

A

Hydrogen, oxygen,Carbon

17
Q

what is the molecular formula of glucose

A

C6 H12 O6

18
Q

what is starch

A

A complex carbohydrate

19
Q

how are complex carbohydrates formed

A

by joining many glucose molecules

20
Q

how can starch be detected

A

by using iodine ( turns brown to blue/black)

21
Q

what can glucose convert to

A

Ethanol

22
Q

using fermintation what can grpes and potatoes turn into

A

Wine and vodka

23
Q

what everday products can plants make

A

cotton plant to make cotton clothes
tea plant to make tea
sunflower to make oils

Nat 5 Chem (12 decks)

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