Which statement about the properties of elements in Group I or in Group VII is correct?

Bromine displaces iodine from an aqueous solution of potassium iodide.

Chlorine, bromine and iodine are diatomic gases at room temperature.

Lithium, sodium and potassium are soft non-metals.

Lithium, sodium and potassium have an increasing number of electrons in their outer shells.

Chemistry

IGCSE&ALevel

CAIE

Exam No：0620_m24_qp_12 Year：2024 Question No：25

Answer:

1.1.1. State the distinguishing properties of solids, liquids and gases

1.1.2. Describe the structures of solids, liquids and gases in terms of particle separation, arrangement and motion

1.1.3. Describe changes of state in terms of melting, boiling, evaporating, freezing and condensing

1.1.4. Describe the effects of temperature and pressure on the volume of a gas

1.1.5. Explain changes of state in terms of kinetic particle theory, including the interpretation of heating and cooling curves

1.1.6. Explain, in terms of kinetic particle theory, the effects of temperature and pressure on the volume of a gas