EASY
Upper Secondary: IGCSE
IMPORTANT
Earn 100
See if you can draw a circular flowchart that shows: how carbon dioxide from the air gets locked up as compounds in petroleum and natural gas.
Important Questions on Some Non-Metals and their Compounds
EASY
Upper Secondary: IGCSE
IMPORTANT
How carbon dioxide is released again, millions of years later.
EASY
Upper Secondary: IGCSE
IMPORTANT
One part of the carbon cycle does not occur naturally (that is, without help from humans). Which part?
EASY
Upper Secondary: IGCSE
IMPORTANT
What part do you play in the carbon cycle?
EASY
Upper Secondary: IGCSE
IMPORTANT
Give the word equation for the combustion of natural gas, in a gas boiler, when the boiler is working well.
EASY
Upper Secondary: IGCSE
IMPORTANT
Give the word equation for the combustion of natural gas in a gas boiler, when the air inlet is partly blocked with soot.
EASY
Upper Secondary: IGCSE
IMPORTANT
Gas boilers should be checked regularly, to make sure air flows through the burner properly. Why?
EASY
Upper Secondary: IGCSE
IMPORTANT
Write an equation to show what happens when lead(II) carbonate is heated.
EASY
Upper Secondary: IGCSE
IMPORTANT
When Calcium carbonate is heated, what kind of reaction occurs?
