Grade 11 - Chapter 12 and 13

When heat energy is applied to a substance, the

temperature increase of the substance depends on

which of the following?

• The mass of the substance

• The types of bonds present in the substance

• The amount of heat energy transferred to the substance

• All of the above

Which of the following is NOT a property of pure water?

• The density of ice is lower than the density of water.

• The specific heat capacity of water is relatively high.

• Water can be found on Earth in all three states, solid, liquid or gas.

• The latent heat of vaporisation of water is very low.

When glucose dissolves in water

• ions will form and the solution will conduct electricity.

• glucose molecules will dissociate and conduct electricity.

• ions will form but the solution will not conduct electricity.

• the bonds between glucose molecules are replaced by hydrogen bonds with water.

Humans sweat to cool themselves down. The property of water that makes sweating so effective is its

• low electrical conductivity.

• high latent heat of fusion.

• relatively high melting point.

• high latent heat of vaporisation.

Which of the followings is insoluble in water?

• sodium nitrate

• potassium phosphate

• barium sulfate

• ammonium nitrate

A precipitation reaction occurs if ions in solution combine to form a new compound that is insoluble in water. The insoluble compound formed in such a reaction is called a .................

Which of the following is a correct explanation for relatively high specific heat capacity of water?

• Because water is a nonpolar molecule.

• Because the number and strength of the hydrogen bonds between water molecules.

• Because water has dipole-dipole bond.

• Because water can form up to 2 hydrogen bonds wich other water molecules.

The bond between H+ and H₂O to form hydronium ion (H₃O⁺) is

• covalent bond

• dipole-dipole bond

• ion-dipole bond

• hydrogen bond

Which of the following statements is correct about spectator ions?

• Spectator ions do not undergo a chemical change in the reaction.

• Spectator ions undergo a chemical change in the reaction.

• Spectator ions participate in a chemical reaction.

• Spectator ions form precipitate in the precipitation reaction.

In the following picture, ions Cl^- and H⁺ is surrounded by H₂O molecules. We can say ions Cl^- and H⁺ are..........

• dissolved.

• miscible.

• hydrated.

• None of the above.