What do we mean by a pure substance in chemistry?

Diagnostic test chapter 1 IAC

Quiz
•
Chemistry
•
3rd Grade
•
Hard

Piet Span
Used 2+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
a substance without polution
a substance which has a boiling point and a melting point
a substance with one colour
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How is the phase transition from gas to liquid called?
evaperation
condensation
sublimation
solidification
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The threshhold limit value expresses
how many mg of a gas may present per m3
how far you are from the limit
how many m3 of gas may present per mg
the value that should be reached to work safely
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A physical quantity is
something very physical
a unit you can use e.g. km or kg
a property you can measure
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If you want to go from degree Kelvin to degree Celsius, you
have to add 273 degrees
do not have to do anything
you have to substract 273 degrees
you have to change the word
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
This hazard pictogram means
not permitted for animals
be aware living creatures present
a cure against animals and plants
environmental hazard
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The density of a substance is 10,0 g/dm3.
How many g is 2,5 dm3 of this substance?
2,5
5,0
25,0
50,0
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