1 The limiting reactant is identified by comparing: A Masses only B Volumes only C Moles with mole ratio D Concentrations only
3 Electrolysis of molten compounds is preferred because: A Water interferes B Electricity is cheap C It gives less product D Reaction is spontaneous
5 Electroplating is used to: A Purify metals B Extract metals C Coat one metal with another D Produce electricity
6 In a galvanic cell, electrons flow from: A Cathode to anode B Anode to cathode C Salt bridge to electrodes D Electrolyte to electrodes
7 A redox reaction is a reaction in which: A Only oxidation occurs B Only reduction occurs C Both oxidation and reduction occur D No electron transfer occurs
8 If percentage yield is 100%, it means: A No reaction occurred B Actual yield is zero C Actual yield equals theoretical yield D Loss of product occurred
10 One mole of any substance contains how many particles? A 6.02 × 10^22 B 6.02 × 10^21 C 6.02 × 10^23 D 6.02 × 10^24
11 In electrolysis of aqueous NaCl, hydrogen is released at: A Anode B Cathode C Salt bridge D Electrolyte
12 Which term refers to unused reactant left after reaction? A Limiting reactant B Excess reactant C Product D Catalyst
14 Which metal is most reactive according to electrochemical series? A Copper B Iron C Zinc D Potassium
15 Which quantity remains unchanged during dilution? A Volume B Molarity C Moles of solute D Strength
17 The Daniell cell consists of zinc and copper electrodes placed in: A Same solution B Distilled water C Their respective salt solutions D Acid solution
18 During dilution, the number of moles of solute: A Increases B Decreases C Remains constant D Becomes zero
19 The amount of product formed depends on: A Excess reactant B Limiting reactant C Temperature only D Pressure only
20 Oxidation is defined as: A Gain of electrons B Loss of electrons C Gain of protons D Loss of neutrons