OCR 21st Century Chemistry core & additional

A range of questions from core & additional chemistry

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  • Created by: Kiesha07
  • Created on: 25-04-14 11:42
Which is the most abundant gas in dry air?
nitrogen
1 of 15
Which gas varies with weather changes?
water vapour
2 of 15
What is another word for Best Estimate?
mean
3 of 15
What forms when sulfur dioxide reacts with water & oxygen? (2words without a space))
acidrain
4 of 15
to make a polymer softer & more flexible you can add a ...
plasticiser
5 of 15
Cross linking makes polymers ...
harder
6 of 15
common salt is called (2 words without a space)
sodium chloride
7 of 15
What gas is always produced when a group 1 metal reacts with water?
hydrogen
8 of 15
What type of bonding joins the atoms in a molecular compound?
covalent
9 of 15
what technique is used to seperate a solid from a liquid?
filtration
10 of 15
In a flame test, which group 1 element gives off a lilac colour?
potassium
11 of 15
Nanoparticles are measured in...
nanometres
12 of 15
The surface area to volume ratio in nanoparticles is... (eg. small, very small, large or very large)
large
13 of 15
hydrocarbons are made up of carbon and ...
hydrogen
14 of 15
What is the total number of atoms in a molecule of sulfur dioxide, SO2?
3
15 of 15

Other cards in this set

Card 2

Front

Which gas varies with weather changes?

Back

water vapour

Card 3

Front

What is another word for Best Estimate?

Back

Preview of the front of card 3

Card 4

Front

What forms when sulfur dioxide reacts with water & oxygen? (2words without a space))

Back

Preview of the front of card 4

Card 5

Front

to make a polymer softer & more flexible you can add a ...

Back

Preview of the front of card 5
View more cards

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