devozeeba 4.1 Three reactions of organic compounds from the same homologous series are shown below. 4.1.1 Define a homologous series. (2) 4.1.2 Name the type of reaction represented by I. (1) 4.1.3 Write down the formula of the inorganic compound P. (1) 4.1.4 Give the structural formula of a POSITIONAL isomer of 2-bromobutane. … Read more
The boiling points of different organic compounds are given below. 3.1 Define boiling point. (2) 3.2 Write down the: 3.2.1 Name of the FUNCTIONAL GROUP of these compounds (1) 3.2.2 IUPAC name of compound C (1) 3.2.3 Structural formula of the FUNCTIONAL isomer of compound B (2) 3.3 Which ONE of … Read more
A test tube containing a straight chain organic acid X, ethanol and a catalyst is heated in a water bath as illustrated below. Organic compound Y is produced according to the following equation: 2.1 Give a reason why the test tube is heated in a water bath instead of directly over the flame. (1) … Read more
1.1 Which ONE of the following is the structural formula of the functional group of the KETONES? 1.2 Which ONE of the formulae below represents an ALKANE? A C2H4 B C5H10 C C14H30 D C8H14 (2) 1.3 Consider the organic compound below. The IUPAC name of this compound is … A 2,3-dimethyl … Read more
10.1 In the simplified AC generator below, the coil is rotated clockwise. 10.1.1 In which direction does the induced current flow in the coil?Choose from: X to Y or Y to X. (1) 10.1.2 On which principle or law is the working of the generator based? (1) 10.1.3 State the energy conversion that takes place … Read more
Learners perform an experiment to determine the emf (ε) and the internal resistance (r)of a battery using the circuit below. 9.1 Which variable has to be kept constant in the experiment? (1) 9.2 Refer to the graph. 9.2.1 Write down the value of the internal resistance of the cell. (2) 9.2.2 Calculate the emf of … Read more
The battery in the circuit diagram below has an emf of 12 V and an internal resistanceof 0,5 Ω. Resistor R has an unknown resistance. 8.1 What is the meaning of the following statement?The emf of the battery is 12 V. (2) The reading on the ammeter is 2 A when switch S is OPEN. … Read more
Three small identical metal spheres, P, S and T, on insulated stands, are initiallyneutral. They are then charged to carry charges of -15 x 10-9 C, Q and +2 x 10-9 Crespectively, as shown below. The charged spheres are brought together so that all three spheres touch each otherat the same time, and are then … Read more
The alarm of a vehicle parked next to a straight horizontal road goes off, emittingsound with a wavelength of 0,34 m. A patrol car is moving at a constant speed on thesame road. The driver of the patrol car hears a sound with a frequency of 50 Hz lowerthan the sound emitted by the alarm. … Read more
The diagram below, not drawn to scale, shows a vehicle with a mass of 1 500 kgstarting from rest at point A at the bottom of a rough incline. Point B is 200 m verticallyabove the horizontal. The total work done by force F that moves the vehicle from point A to point B in … Read more