Flashcarda
(17 cards)
Crude oil is a finite resource,what is a finite resource?
A limited resource
What is crude oil formed from?
Plankton
What type of substance is crude oil?
Mixture
Finish the sentence Im fractional distillation crude oil is heated so the hydrocarbons _________
Evaporate
What is used in the test for hydrogen gas?
Burning splint
Gases in the earths early atmosphere causes changes on the earth.
Which gases formed oceans and which formed sedimentary rocks
Oceans formed-water vapour
Sedimentary rocks-carbon dioxide
Why is potable water sterilised
To kill bacteria
Complete the sentence :equilibrium is reached when the forward and reverse reactions occur at the same_______
Rate
When damp litmus paper is put into chlorine gas the litmus paper turns
White
Results close to the true value are______
Accurate
At a higher temperature,the rate of reaction will______
Increase
Which chemical element do all these gases contain?
Oxides of nitrogen
Carbon monoxide
Water vapour
Carbon
When diesel burns in a car engine,oxides of nitrogen are produced
Where does the nitrogen come from?
The air (air contains about 78% nitrogen)
When diesel burns,particulates may be produced
What environmental effect do particulates cause from burning diesel
Air polution
Give one reason carbon monoxide is difficult to detect
It’s odourless( or colourless)
Why is water vapour and not liquid water produced when diesel burns
Water vapor is produced when diesel burns instead of liquid water because the combustion occurs at high temperatures. At these temperatures, water forms as a gas rather than condensing into liquid.
Chromatography involved wich phases ?
Stationary phase,mobile phase
