QUESTION 10 (Start on a new page.) The flow diagram below shows the processes involved in the industrial preparation ofan ammonium fertiliser. 10.1 Write down the NAME or FORMULA of: 10.1.1 Gas X (1) 10.1.2 Gas Y (1) 10.1.3 Acid Q (1) 10.2 Write down the: 10.2.1 TYPE of chemical reaction that converts compound P … Read more
QUESTION 9 (Start on a new page.) Chlorine is produced industrially by the electrolysis of a concentrated sodium chloridesolution, NaCℓ(aq). The balanced equation for the net (overall) cell reaction is as follows: 9.1 Define the term electrolysis. (2) 9.2 For the above reaction, write down the: 9.2.1 Half-reaction that takes place at the cathode (2) … Read more
QUESTION 8 (Start on a new page.) A standard electrochemical cell is set up using two standard half-cells, as shown in thediagram below. 8.1 State the energy conversion that takes place in this cell. (1) 8.2 What is the function of component Q? (1) X is a metal. A voltmeter connected across the cell initially … Read more
QUESTION 7 (Start on a new page.) A hydrogen bromide solution, HBr(aq), reacts with water according to the followingbalanced chemical equation: The Ka value of HBr(aq) at 25 °C is 1 x 109. 7.1 Is hydrogen bromide a STRONG ACID or a WEAK ACID? Give a reason for the answer. (2) 7.2 Write down the … Read more
QUESTION 6 (Start on a new page.) Initially 60,8 g pure carbon dioxide, CO2(g), is reacted with carbon, C(s), in a sealedcontainer of volume 3 dm3. The reaction reaches equilibrium at temperature Taccording to the following balanced equation: 6.1 Define the term chemical equilibrium. (2) 6.2 At equilibrium it is found that the concentration of … Read more
QUESTION 5 (Start on a new page.) The calcium carbonate (CaCO3) in antacid tablets reacts with dilute hydrochloric acid(HCℓ) according to the following balanced equation: 5.1 Is the above reaction EXOTHERMIC or ENDOTHERMIC? Give a reason for the answer. (2) An antacid tablet of mass 2 g is placed in HCℓ(aq). After 30 s the … Read more
QUESTION 4 (Start on a new page.) The flow diagram below shows how compound A can be used to prepare other organiccompounds. The numbers I, II, III and IV represent different organic reactions. Use the information in the flow diagram to answer the following questions. 4.1 Name the homologous series to which compound A belongs. … Read more
QUESTION 3 (Start on a new page.) The boiling points of five organic compounds (P, Q, R, S and T) are studied. 3.1 Define the term boiling point. (2) The boiling points of compounds Q, R and S are compared. 3.2 Give a reason why this is a fair comparison. (1) The boiling points of … Read more
QUESTION 2 (Start on a new page.) 2.1 The IUPAC name of an organic compound is 4,4-dimethylpent-2-yne. 2.1.1 Write down the GENERAL FORMULA of the homologous series to which this compound belongs. (1) 2.1.2 Write down the STRUCTURAL formula of this compound. (3) 2.2 The organic compound below has one positional isomer and one functional … Read more
QUESTION 1: MULTIPLE-CHOICE QUESTIONS Four options are provided as possible answers to the following questions. Choose theanswer and write only the letter (A–D) next to the question numbers (1.1 to 1.10) inthe ANSWER BOOK, e.g. 1.11 E. 1.1 Which ONE of the following compounds has the HIGHEST vapour pressure? A HCOOH B CH3CHO C CH3CH2OH … Read more