Ghee melts at 33.4-38.8°C , is it a pure substance? Support your answer with reason
Ghee melts on a range of temperature hence is impure
Oops!
Check
Okay!
Check
monster
Reset all scores!
Oops!
seesaw
Swap points!
Okay!
fairy
Take points!
5
10
15
20
25
thief
Give points!
5
10
15
20
25
baam
Lose 15 points!
Oops!
magnet
Take 25 points!
Okay!
rocket
Go to first place!
Okay!
thief
Give points!
5
10
15
20
25
trap
No points!
Oops!
rocket
Go to first place!
Okay!
fairy
Take points!
5
10
15
20
25
lifesaver
Give 20 points!
Oops!
10
Explain how can a chromatograph show weather a substance is pure or not ?
a pure substance produces one spot on the chromatogram. an impure substance produces two or more spots
Oops!
Check
Okay!
Check
10
what do you understand by a pure substance ?
ubstances which are made up of only one kind of atoms or molecules
Oops!
Check
Okay!
Check
10
oil and water are immiscible how will you separate them using a lab apparatus
Separating immiscible liquids is done simply using a separating funnel. The two liquids are put into the funnel and are left for a short time to settle out and
Oops!
Check
Okay!
Check
10
Why is mercury thermometer risky to use compared to a digital one ?
lass is very fragile, it can easily break. Mercury is a toxic chemical, which if released could contaminate the body as well as surrounding
Oops!
Check
Okay!
Check
10
What is the SI unit of volume ?
Cubic metre
Oops!
Check
Okay!
Check
10
Name some apparatus to measure the volume of liquid
Graduated cylinder or a buret
Oops!
Check
Okay!
Check
10
difference between sedimentation and decantation
sedimentation allows the separation of two substances via settling of one substance whereas the decantation allows the separation of two substances via pouring
