The bonds in crystalline ammonium chloride are

• A. covalent and dative
• B. ionic and covalent
• C. ionic covalent and dative
• D. ionic covalent and hydrogen bond

Hydration of ions in solution is associated with

• A. absorption of heat
• B. reduction of heat
• C. conduction of heat
• D. liberation of heat

Which of the following elements would displace copper from a solution of copper ions?

• A. silver
• B. gold
• C. lead
• D. mercury

Which oxide is amphiprotic (amphoteric)?

• A) MgO
• B) NaO
• C) CaO
• D) ZnO

A difference between chemical and physical change is that in a chemical change

• A) oxygen is consumed
• B) heat is supplied
• C) a reversible process oocurs
• D) a new substance is formed

Sodium hydrogen should be stored in properly closed containers because it?

• A. readily asborbs water vapour to air
• B. is easily oxidize by atmospheric oxygen
• C. turns golden yellow when exposed to light
• D. melts at a low temperature

The shape of ammonia molecules is

• A) trigonal planar
• B) octahedral
• C) square planar
• D) tetrahedral

Which of the following affect(s) the discharge of ions during electrolysis?

• A. Position of the ion in the redox reaction
• B. concentration of the ions
• C. Nature of the electrodes
• D. Temperature of the solution

The compound that is used as an anaesthetic is

• A) CCl₄
• B) CH Cl₃
• C) CH₂Cl₂
• D) CH₂Cl

The positive of an element in the Periodic Table is determined by

• A. its density
• B. its atomic radius
• C. its relative atomic mass
• D. the number of protons in its atom