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Chem > Chemistry 2a Natures Chemistry > Flashcards

Chemistry 2a Natures Chemistry Flashcards

1
Q

What does starch and sugar belong to

A

Carbohydrates

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2
Q

What carbohydrate is used in resperation

A

Glucose

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3
Q

What’s the molecular formula of glucose

A

C6 H12 06

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4
Q

What are carbohydrates made of

A

Carbon hydrogen and oxygen

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5
Q

What’s the ratio of hydrogen and oxygen

A

Two to one

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6
Q

What is a complex carbohydrate

A

Starch

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7
Q

Why is starch a complex hydrocarbon

A

Because its formed by joining many glucose molecules together

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8
Q

What is used to detect some sugars such as GLUCOSE FRUCTOSE AND MALTOSE

A

HEATED benedicts solution

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9
Q

What two carbohydrates don’t effect heated benedicts solution

A

Sucrose and starch

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10
Q

What’s the colour change of benedicts solution when there is a sugar

A

BLUE to BRICK RED

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11
Q

What is iodine solution used for detecting

A

Starch

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12
Q

What’s the colour change of iodine solution when starch is present

A

BROWN TO BLUE/BLACK

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13
Q

What is fermentation

A

A reaction which breaks down glucose for fruit and vegetables to form alcohol

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14
Q

What is formed during fermentation

A

Ethanol and carbon dioxide

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15
Q

What is used as a catalysts for fermentation

A

An enzyme

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16
Q

What is the limit to alcohol percentage from fermentation

A

12 percent

17
Q

Whats a hydroxyl functional group

A

The -OH that is added on to the end of the molecule

18
Q

What’s the general formula for a hydroxyl functional group

A

Cn H2n +1OH

19
Q

What do the hydroxyl functional groups names all end in

A

-OL

20
Q

What functional group is butan-1-ol in

A

Hydroxyl

21
Q

Why is larger molecules boiling points larger

A

Because the longer the hydrocarbon chains makes greater forces of attraction between molecules know as inter molecular forces meaning more energy is required to separate them

22
Q

What sugars are soluble in water and why

A

Methanol ethanol and propanol / first three because as the chain length of the molecule increases the solubility of the alcohol decreases

23
Q

What alcohol is used in drinks

A

Ethanol

24
Q

What are achahols usually used for and why

A

Fuels because they are highly flammable and burn cleanly

25
Q

What is the carboxyl functional group

A

-COOH

26
Q

What do carboxylic acids names all end in

A

-oic acid

27
Q

What’s the general formula for carboxylic acids

A

CnH2n+1COOH

28
Q

Where is the carboxyl group always

A

At the end of the chain

29
Q

What is carboxylic acids used for

A

Vinegar, cleaning limescale in bathrooms

30
Q

What is a fuel

A

A substance that contains energy and burns to release energy

31
Q

What is a reaction that releases heat energy

A

Exothermic

32
Q

What reaction takes in energy

A

Endothermic

33
Q

What is hydrocarbon and example of

A

A fuel

34
Q

What happens during combustion

A

A substance burns in oxygen and releases energy

35
Q

What is produced when a hydrocarbon is burnt in a plentiful supply of oxygen

A

Carbon dioxide and water

Chem (2 decks)

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