B8 Practice Questions 2.2 – Substances have Properties II – Biologie · Chemie · Medien

1.

Which property allows iron to be picked up by a magnet?

Its hardness

Its magnetism (magnetisability)

Its electrical conductivity

2.

Sugar and salt cannot be told apart by testing solubility in water alone, because substances dissolve in water.

3.

Sublimation is the direct change of a solid into a liquid.

True

False

4.

Why is it important to check several properties, not just one, before identifying a substance?

Because one property alone (such as solubility in water) may be shared by different substances

Because chemistry rules require exactly three tests

Because a single property is always enough to identify any substance

5.

Sugar dissolves in water, but it does not dissolve in petrol. This shows that solubility depends on the used.

6.

What does this experiment show about metal and glass?

Glass conducts heat faster than metal

Metal has a higher thermal conductivity than glass

Metal and glass conduct heat equally well

7.

According to the text, what is boiling?

A change of state that happens gradually over a range of temperatures

A change of state that takes place at one specific temperature

A change from gas directly to solid

8.

A metal spoon left in a glass of water dissolves, just like sugar does.

True

False

9.

In the heating experiment, candles were fixed to a metal rod and a glass rod. The candles on the rod melted first.

10.

Metals conduct electricity well, but plastics do conduct electricity.

11.

Solid carbon dioxide, often called 'dry ice', turns directly into a gas. This process is called .

12.

The temperature at which a solid changes into a liquid is called the melting .

13.

A diamond can scratch steel, but steel cannot scratch a diamond.

True

False

14.

For a pure substance, the melting point and the freezing point have the same temperature value.

True

False

15.

Besides iron, the metals cobalt, nickel and are also magnetic.