Question

Choose the correct statement(s) from the following.

• A. Magnesium oxide is more stable than carbon dioxide.
• B. magnesium oxide has higher melting point than ice.
• C. Hydrogen has more density than potassium chloride
• D. Carbon dioxide is more stable than magnesium oxide.

Answer 1

Answer: (A), (B)

The correct options are
A Magnesium oxide is more stable than carbon dioxide.
B magnesium oxide has higher melting point than ice.

Ionic compounds are more stable than covalent compounds. Magnesium oxide is an ionic compound and carbon dioxide is a covalent compound. So, magnesium oxide is more stable than carbon dioxide.

Ionic compounds have higher melting point than covalent compounds. Magnesium oxide is an ionic compound and ice is a covalent compound. So, magnesium oxide have higher melting point than ice.

Ionic compounds are more denser than covalent compounds. Potassium chloride is an ionic compound and hydrogen is a covalent compound. So, potassium chloride is more denser than hydrogen.