Grade 10 T2 Exam correction

Name the change of state W

Name the change of state X

Name the change of state Y

Name the last change of state:

gas to solid

In ionic bonds, the electrons are...

• shared between non-metal atoms

• gained my non-metals and lost by metals, forming ions

In covalent bonds, electrons are...

• shared between non-metal atoms

• gained by non-metals and lost by metals, forming ions

Which of the following statements about ionic compounds are correct? (multiple answers)

• They have high boiling and melting points

• They are structured in giant covalent structures

• They are structured in giant ionic lattice structures

• They are held together by strong electrostatic attraction forces

• They are held together by weak intermolecular attraction forces

Which of the following statements about simple covalent compounds are correct? (multiple answers)

• They have low boiling and melting points

• The covalent bond is weak. It breaks during boiling/melting

• They are held together by strong electrostatic attraction forces

• They are held together by weak intermolecular forces

• The covalent bond is strong. It doesn't break during boiling/melting

Sodium carbonate is an ionic compound.

Explain why sodium carbonate has a high melting point.

Refer to structure and bonding in your answer.

Give a reason why carbon monoxide is poisonous

• It can harm your lungs

• it reduces the capacity of the blood to carry oxygen

• It reduces the capacity of the lungs to carry oxygen

• it leads to global warming