Purity of a substance

Q.

the melting point of hydrogen is -259.87*C and its boiling point is -252*C. This means at this very low temperature -252*C hydrogen in the form of gas ?

Q.

Name two properties of a substance to check its purity?

Q.

Identify the physical property that can help to check the purity of a substance.

1. Both Atmospheric pressure and Colour

2. Atmospheric pressure

3. Melting and boiling point

4. Colour

Q.

Which property of a substance checks its purity?

1. Homogeneity

2. Atmospheric pressure

3. Both Atmospheric pressure and Homogeneity

4. Melting and boiling point

Q.

Identify the physical property that can help to check the purity of a substance.

1. Atmospheric pressure

2. Melting and boiling point

3. Both Atmosphericpressure and Homogeneity

4. Homogeneity