Properties of Ionic and covalent compounds

• It has sharp corners

• It has flat surfaces

• It has an acute angle between the two adjacent surfaces

• It has straight edges between two adjacent surfaces

• A

• B

• C

• D

Which of the following is a property of potassium fluoride?

• Volatile

• Insoluble in water

• Has a low melting point

• Conducts electricity in the aqueous solution

What is the property of the compound?

• Can conduct electricity in solid state

• Exists as liquid at room temperature

• Has low melting and boiling points

• Soluble in water

Which of the following explains the result?

• Water is not added to the substance.

• The substance consists of molecules

• The melting point of substance is low

• The substance consists of ions in fixed position

• Glucose

• Naphthalene

• Lead(II) bromide

• Sodium chloride

What is the property of the compound?

• Dissolves in dry propanone

• High melting point

• Dissolves in water to produce acidic solution

• Conducts electricity in molten state

Compound X conducts electricity in aqueous solution or molten state. It also has a high melting point and boiling point.

What is X?

• $CCl_4$

• $MgCl_2$

• $CO_2$

• $NH_3$

Compound X has high melting and boiling point. Which of the following explains the statement.

• Compound X has strong covalent bond between ions.

• Compound X has strong electrostatic force between ions.

• Compound X has strong electrostatic force between molecules.

• Compound X has strong covalent bond between atoms and giant lattice structure.

• Tetrachloromethane

• Sodium sulphate

• Lead(II) bromide

• Magnesium chloride