devozeeba 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
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
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
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
7.1 A small sphere, Y, carrying an unknown charge, is suspended at the end of a light in extensible string which is attached to a fixed point. Another sphere, X, carrying a charge of +6 x10-6 C, on an insulated stand is brought close to sphere Y. Sphere Y experiences an electrostatic force and comes … Read more
The siren of a police car, which is travelling at a constant speed along a straight horizontal road, emits sound waves of constant frequency. Detector P is placed inside the police car and detector Q is placed next to the road at a certain distance away from the car. The two detectors record the changes … Read more
An object of mass 1,8 kg slides down a rough curved track and passes point A, which is 1,5 m above the ground, at a speed of 0,95 m·s-1. The object reaches point B at the bottom of the track at a speed of 4 m·s-1. 5.1 Define the term conservative force. (2) 5.2 … Read more