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chemistry s2 > End Of Year Test > Flashcards

End Of Year Test Flashcards

1
Q

What is a fuel?

A

A substance that is burned to release energy

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2
Q

What is combustion?

A

Another word for burning

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3
Q

What happens when a substance burns?

A

It reacts with oxygen

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4
Q

What is the test for oxygen?

A

It relights a glowing splint

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5
Q

How is carbon dioxide produced?

A

Carbon reacts with oxygen.

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6
Q

What is the test for carbon dioxide?

A

The test for carbon dioxide is that it turns lime water cloudy

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7
Q

How is carbon monoxide produced?

A

Carbon monoxide is produced when carbon burns in an insufficient supply of oxygen.

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8
Q

What is carbon monoxide?

A

Carbon monoxide is a toxic gas.

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9
Q

How is water produced?

A

Hydrogen reacts with oxygen to produce water.

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10
Q

What is the test for hydrogen?

A

The test for hydrogen is that it burns with a squeaky pop

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11
Q

What is hydrogen being hailed as?

A

Hydrogen is being hailed as a fuel of the future

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12
Q

What are the fossil fuels?

A

Coal, oil and gas are all fossil fuels.

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13
Q

How were fossil fuels formed?

A

Coal, oil and gas were formed from the remains of plant and animal organisms that lived millions of years ago.

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14
Q

What produces carbon dioxide and water

A

Oil and gas burn to produce carbon dioxide and water

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15
Q

What do crude oil and natural gas mainly consist of?

A

Crude oil and natural gas consist mainly of compounds called hydrocarbons.

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16
Q

What do hydrocarbons contain?

A

Hydrocarbons only contain the elements hydrogen and carbon.

17
Q

What is crude oil?

A

Crude oil is a mixture of hydrocarbons

18
Q

What is fractional distillation?

A

Fractional distillation is a process used to separate substances with different boiling points.

19
Q

What does fraction disilltation do to crude oil?

A

Fractional distillation is used to separate crude oil into fractions

20
Q

What is a fraction in chemistry?

A

A fraction is a group of hydrocarbons all with boiling points in a specific range.

21
Q

What do fractions have?

A

Fractions have names and different uses

22
Q

Other than boiling points what do fractions differ in?

A

Fractions also differ in viscosity and flammability

23
Q

What is acid rain caused by?

A

Acid rain is caused when gases such as sulphur dioxide and nitrogen dioxide dissolve in water in the atmosphere

24
Q

What does acid rain do?

A

Acid rain kills fish in rivers, erodes buildings and destroys plant life.

25
Q

How is sulphur dioxide produced

A

Sulphur dioxide is produced when fossil fuels are burned

26
Q

How is nitrogen dioxide produced

A

Nitrogen dioxide is produced by sparking of air in a petrol car engine.

27
Q

What are some ways that pollution from fossil fuels can np be reduced?

A

Lean-burn engines, catalytic converters, low sulphur petrol.

28
Q

What is photosynthesis

A

Photosynthesis is the process by which plants make carbohydrates from carbon dioxide and water, using ,gout energy in the presence of chlorophyll

29
Q

Why are carbohydrates an important food for animals?

A

They provide energy

30
Q

What happens when carbohydrates are burned?

A

Because carbohydrates release energy, they produce carbon dioxide and water when burned.

31
Q

What is the word equation for photosynthesis and respiration

A

Glucose + Oxygen = Carbon Dioxide

32
Q

How are alcoholic drinks made?

A

Alcoholic drinks can be made from any fruit or vegetable which is a source of starch or sugars.

33
Q

What is an enzyme in yeast?

A

An enzyme in yeast is the catalyst for the reaction of alcohol

34
Q

How does the type of alcoholic drink vary?

A

The type of alcoholic drink varies with the plant source of the carbohydrate.

35
Q

How is distillation used in alcohol?

A

Distillation is used to increase the alcohol concentration of the products from fermentation

chemistry s2 (3 decks)

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