How many pi (π) bonds are there in an alkene with six carbon atoms?

• A. 4
• B. 6
• C. 5
• D. 3

Group O of elements are unreactive because

• A. their outmost shells contain equal number of electrons
• B. their highest occupied enegy level is full
• C. they are monatomic gases
• D. they are non-metals

The molar enthalpy change accompanying the removal of an electron from a gas phase atom or ion in its ground state is called?

• A. Electron gain enthalpy
• B. Ionization enthalpy
• C. Enthalpy change
• D. Enthalpic gas removal

How many molecules of oxygen would occupy a volume of 2.24 cm³ at s.t.p? [Molar volume at s.t.p = 22,400 cm³, Avogadro's number = 6.02 x 10²³]

• A. 3.01 x 10²⁰
• B. 3.01 x 10²⁷
• C. 6.02 x 10¹⁹
• D. 6.02 x 10²⁷

Which of the substance lettered P to V in the equation below would be left on the filter paper if the reaction mixture were filtered? P (aq) + Q(aq) → V(s) + R(aq) + T(g)

• A. P
• B. Q
• C. V
• D. T

Which of the following equations represents the reaction of chlorine with hot concentrated sodium hydroxide solution?

• A. 2KOH + CI₂ ---------->KClO + KCI+H₂O
• 4KOH + 2Cl₂ ----------->4KCl +2H₂O + O₂
• C. 6KOH + 3Cl₂ ---------> KClO₃ + 5KCl + 3H₂O
• D. 2KOH + CI --------> 2KCI + H₂O

The empirical formula of a compound containing 0.067mol Cu and 0.066mol O is [Cu = 63.5, O = 16]

• A. Cu₂O
• B. CuO
• C. CuO₂
• D. CuO₄

Soaps and detergents have the same basic characteristics except that the carboxyl group of the fatty acid in detergent is replaced by:

• A) alcohol
• B) sulphate or a sulphonate group
• C) ester
• D) acids

Which of the following properties of atoms generally increases down a group in the periodic table?

• A. Electron affinity
• B. Electronegativity
• C. Ionic radius
• D. lonization energy

0.79g of a gas as s.t.p occupied a volume of 250cm³. What is the relative molecular mass of the gas? [G.M.V. at s.t.p = 22.4dm³]

• A) 17
• B) 32
• C) 64
• D) 71