Question 1

1.1 Which ONE of the following is the structural formula of the functional group of the KETONES?

1.2 Which ONE of the formulae below represents an ALKANE?   

A C₂H₄          
B C₅H₁₀
C C₁₄H₃₀
D C₈H₁₄    (2)

1.3 Consider the organic compound below.

The IUPAC name of this compound is …

A 2,3-dimethyl butane.          
B 3,3-dimethyl butane.
C 2,2-dimethyl butane.
D 1,1,1-trimethyl propane.    (2)

1.4 Activation energy can best be described as the minimum energy required  to …

A cause effective collisions.
B make reactant molecules collide.
C change the orientation of reactant molecules.
D increase the kinetic energy of reactant molecules.        (2)

1.5 Which statement is CORRECT for a system in DYNAMIC EQUILIBRIUM?

A All reactants are used up.  
B The forward reaction is equal to the reverse reaction.
C All substances in the reaction are of equal concentration.
D The concentration of the reactants and products remain constant. (2)

1.6 Initially, a certain amount of P(g) was placed in an empty container. The hypothetical reaction reaches

equilibrium in a closed container according to the following balanced equation:

At time t, the temperature is increased.

Which graph below best illustrates the resulting changes in the rates of the forward and reverse reactions after the temperature is increased?

1.7 Reactions I and II below have equilibrium constants (K_c) greater than 1.

Based on the reactions above, the ACIDS in order of INCREASING STRENGTH (weakest to strongest) are …

A H₃X, H₂X−, H₃O⁺
B H₂CO₃, H₃X, H₃O⁺
C H₃X, H₂CO₃, H₃O⁺
D H₃X, H₃O+, H₂CO₃ (2)

1.8 Consider the cell notation for a galvanic cell below.

Which ONE of the following half-reactions takes place at the ANODE of this cell?

A 2H⁺(aq) + 2e⁻→ H₂(g)
B H₂(g) → 2H⁺(aq) + 2e⁻
C Ni²⁺(aq) + 2e⁻→ Ni(s)
D Ni(s) → Ni²⁺(aq) + 2e⁻ (2)

1.9 Which ONE of the following is applicable to an ELECTROLYTIC CELL?

A Reduction takes place at the anode.
B Oxidation takes place at the cathode.
C It uses alternating current.
D A battery is used for the cell to function. (2)

1.10 The flow diagram below shows four stages (A, B, C and D) in the conversion of sulphur to sulphuric acid.

At what stage is a catalyst used?

A A
B B
C C
D D (2)

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