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
what do you understand by a pure substance ?
ubstances which are made up of only one kind of atoms or molecules
What is the SI unit of volume ?
Cubic metre
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
Name some apparatus to measure the volume of liquid
Graduated cylinder or a buret
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
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
what is the SI unit of mass ?
kilograms (Kg)
