Chemical bonding

What type of bond is formed by sharing of electrons?

• Ionic

• Covalent

• Metallic

• Hydrogen

Sodium and chlorine form an:

• Covalent bond

• Hydrogen bond

• Metallic bond

• Ionic bond

What is the valency of oxygen in water (H₂O)?

• 1

• 2

• 3

• 4

Which of the following elements forms covalent bonds?

• Na

• Mg

• Cl

• K

Why do atoms form chemical bonds?

• To increase their size

• To become unstable

• To attain noble gas configuration

• To become radioactive

What happens when a metal reacts with a non-metal?

• Covalent bond is formed

• Ionic bond is formed

• No reaction occurs

• Hydrogen bond is formed

Which of the following pairs will form a non-polar covalent bond?

• H and H

• H and O

• H and Cl

• H and N

In NH₃, how many electrons are shared between nitrogen and hydrogen?

• 2

• 4

• 6

• 8

Why is NaCl solid at room temperature?

• It has covalent bonds

• It has a low melting point

• It has strong electrostatic forces

• It is a gas at room temperature

Which of the following best explains the high melting point of ionic compounds?

• Weak bonds between atoms

• Sharing of electrons

• Strong attraction between oppositely charged ions

• Present of covalent bonds