paper2

Question 6

by

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

by

QUESTION 5 (Start on a new page.) The calcium carbonate (CaCO3) in antacid tablets reacts with dilute hydrochloric acid(HCâ„“) 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 HCâ„“(aq). After 30 s the … Read more

Question 4

by

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 2

by

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

by

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

Question 10

by

During an experiment, light of different frequencies is radiated onto a silver cathode of  a photocell and the corresponding maximum speed of the ejected photoelectrons are measured. A graph of the energy of the incident photons versus the square of the maximum speed of the ejected photoelectrons is shown below. 10.1 Define the term photoelectric … Read more

Question 9

by

9.1 A simplified diagram of an electric generator is shown below. When the coil is  rotated with a constant speed, an emf is induced in the coil. 9.1.1 Is this an AC generator or a DC generator?        (1) 9.1.2 Briefly explain how an emf is generated in the coil when the coil is rotated by referring … Read more

Question 8

by

In the circuit diagram below, resistor R,with a resistance of 5,6 Ω, is connected,   together with a switch, an ammeter and a high-resistance voltmeter, to a battery with an unknown internal resistance, r. The resistance of the connecting wires and the ammeter may be ignored. The graph below shows the potential difference across the terminals … Read more