Chemistry test module 3 flashcards
To get 100% in my chemistry test
Crude oils and natural gases mainly consist of which type of compounds?
They mainly consist of Hydrocarbon
Which elements are present in hydrocarbons?
Hydrogen and Carbon only.
What is crude oil a mixture of?
Hydrocarbons.
What is fractional distillation?
A process used to separate substances with different boiling points.
What is Fractional distillation used for in crude oil?
It is used to separate crude oil into fractions.
What is a fraction?
A group of hydrocarbons all with boiling points within a specific range.
What do fractions have?
Names and specific uses.
As well as boiling points what do fractions differ in?
Viscosity and flammability.
What can the properties of fractions be related to?
The size of molecules in the fraction.
What are two pollution problems associated with burning fossil fuels?
Global warming and Acid rain.
What is the name given to the highly toxic gas produced by incomplete combustion of fossil fuels?
Carbon monoxide.
What is acid rain caused by?
Acid rain is caused when gases such as sulphur dioxide and nitrogen dioxide dissolve in water in the atmosphere.
What effects does acid rain have?
It kills fish in rivers, erodes buildings and destroys plant life.
What is produced when some fossil fuels burn?
Sulphur dioxide.
How is nitrogen dioxide made?
It is made by sparking of air in a petrol car engine.
What are some examples of ways that pollution from burning fossil fuels can be reduced?
Lean burn engines, catalytic converters and low sulphur petrol.
What is the name given to the process in which plants make carbohydrates?
Photosynthesis is the process in which plants make carbohydrates from carbon dioxide and water, using light energy in the presence of chlorophyll.
Why are carbohydrates an important food for animals?
They provide energy.
What do carbohydrates do?
Release energy, producing carbon dioxide and water when burned.
What are alcoholic drinks made from?
Any fruit or vegetable which is a source of starch or sugars.
What is distillation used for?
To increase the alcohol concentration of products from fermentation.
How does Carbon Dioxide contribute to Climate Change?
From burning fossil fuels
What is the word equation for photosynthesis?
Carbon dioxide+ water- glucose+oxygen
What is the word equation for respiration?
Glucose+Oxygen - Carbon dioxide+ Water
