Question 9

The simplified diagram below represents an electrolytic cell used to electroplate acopper (Cu) coin with silver (Ag). 9.1 Define the term electrolysis. (2) 9.2 Which component in the diagram indicates that this is an electrolytic cell? (1) 9.3 Write down the NAME or FORMULA of the electrolyte. (1) 9.4 How will the concentration of the … Read more

Question 8

The electrochemical cell illustrated below is set up under standard conditions 8.1 Component X completes the circuit in the cell. State ONE other function of component X. (1) 8.2 Define the term anode. (2) 8.3 Identify the anode in the cell above. (1) 8.4 Write down the: 8.4.1 Reduction half-reaction that takes place in this … Read more

Question 5

The reaction of calcium carbonate (CaCO3) and EXCESS dilute hydrochloric acid(HCℓ) is used to investigate one of the factors that affects reaction rate. The balancedequation for the reaction is: The same mass of CaCO3 is used in all the experiments and the temperature of thehydrochloric acid in all experiments is 40 °C. The reaction conditions … Read more

Question 4

The flow diagram below shows how various organic compounds can be prepared usingcompound P as starting reagent 4.1 Write down the meaning of the term hydrohalogenation. (2) 4.2 Write down the STRUCTURAL FORMULA of compound Q. (2) 4.3 Reaction I is an elimination reaction. Write down the: 4.3.1 TYPE of elimination reaction (1) 4.3.2 MOLECULAR … Read more

Question 3

The relationship between boiling point and the number of carbon atoms in straightchain molecules of aldehydes, alkanes and primary alcohols is investigated. Curves A,B and C are obtained. 3.1 Define the term boiling point. (2) 3.2 Write down the STRUCTURAL FORMULA of the functional group of the aldehydes. (1) 3.3 The graph shows that the … Read more