B And M Points

Question 1

Melting point of a pure substance

Answer 1

Is the constant temperature at which the solid changes to its liquid, the substance melts. The temperature of a pure substance remains constant while it changes phase until a of the substance has changed phase like from a solid to liquid. It melts and freeze at the same fixed temperature. It’s recorded at a single number.

Question 2

Impure substances/mixture

Answer 2

Melt at a range of temperature. The melting point is recorded as the temperature at which the first few drops of liquid appear.

The freezing point is recorded at a temperature at which the first piece of solid is seen when the liquid is cooling.

Question 3

How to determine which state a substance is according to the table given with melting and boiling point values

Answer 3

The room temperature is 20 degrees.
Draw a time line with all the values and the between the value is the phase.

Question 4

Boiling point of a pure substance

Answer 4

Temperature at which a pure substance boils and the condensation point is the temperature at which vapor /gas condenses to become a liquid again. The boiling point of a pure substance is the same temperature as it’s condensation point.

Question 5

Solutions consisting of more than one substance have more than one

Answer 5

Bing point as it’s individual constituents of a mixture/solution retain their physical and chemical properties.

Question 6

Alloy

Answer 6

Mixture of different elements