Chemistry model paper

Which element exists as a molecule at room temperature?

• Zinc

• Argon

• Hydrogen

• Magnesium sulphate

What is the meaning of Avogadro constant?

• Mass of one mol of a substance

• Volume of one mol of a substance

• Concentration in one mol of a substance

• Number of particles in one mol of a substance

Which of the following is a diatomic gas?

• Neon

• Helium

• Chlorine

• Xenon

Table 1 shows the electron arrangement of elements R, S, T and U. Which element is a halogen?

• R

• S

• T

• U

Which atom forms a cation?

• Bromine

• Oxygen

• Nitrogen

• Magnesium

Diagram 1 shows the formation of a type of chemical bond. What is the type of chemical bond formed?

• Ionic bond

• Covalent bond

• Dative bond

• Metallic bond

What is the unit used for the rate of reaction?

• g mol^-1

• g min^-1

• mol dm^-3

• kJ mol^-1

Which of the following are the applications of advanced ceramics?

• Plates

• Brake discs

• Bricks

• Cutting discs

Which of the following is related to a reduction reaction?

• Loses of electrons

• Loses of hydrogens

• Gains of oxygen

• Decreases in oxidation number

Which of the following elements have more than one oxidation number?

• Iron

• Lead

• Potassium

• Magnesium