Learners use the reaction of MgCO3(s) with EXCESS dilute HCℓ(aq) to investigate therelationship between temperature and the rate of a chemical reaction.The balanced equation for the reaction is:MgCO3(s) + 2HCℓ(aq) → MgCℓ2(aq) + CO2(g) + H2O(ℓ)The results obtained are represented in the graph below. 5.1 Define the term rate of reaction. (2) 5.2 State TWO … Read more
Arrestor beds are used to help moving trucks to come to a stop when their brakes fail.The driver of a 30 000 kg truck driving down a steep road drives onto an ASCENDING arrestor bed inclined at 28° to the horizontal, as shown in the diagram below. 5.1 State the work-energy theorem in words. (2) … Read more
The reaction of 15 g of an IMPURE sample of calcium carbonate, CaCO3, with EXCESS hydrochloric acid, HCℓ, of concentration 1,0 mol∙dm-3 , is used to investigate the rate of a reaction. The balanced equation for the reaction is:CaCO3(s) + 2HCℓ(aq) → CaCℓ2(aq) + H2O(ℓ) + CO2(g)The volume of CO2(g) produced is measured at regular … Read more
Two experiments, I and II, are conducted to investigate one of the factors that affects the rate of the reaction of aluminium carbonate, Aℓ2(CO3)3, with EXCESS hydrochloric acid, HCℓ. The balanced equation for the reaction is: The apparatus used is shown below. The reaction conditions used for each experiment are as follows: Experiment I:100 cm3 … Read more
A demolition ball is used by a crane to break the wall of a building.The demolition ball, of mass 1 250 kg, is lifted by the crane to a point R at a height of5,8 m above its lowest position in 60 s.Ignore air friction. 5.1 Define the term power in words. (2) 5.2 Calculate … Read more
QUESTION 5: USING LANGUAGE CORRECTLY Read TEXT G, which contains some deliberate errors, and answer the set questions. TEXT G 5.1 Provide the function of the two dashes in line 1. (1) 5.2 Substitute ‘Hopefully’ (line 3) with a main clause that retains the meaning ofthe sentence. (1) 5.3 ‘More important, you’ve managed to survive … Read more
SECTION C: SHORT STORIES In this section, questions are set on the following short stories: QUESTION 5 Read the extracts from the TWO short stories below and answer the questions set oneach. The number of marks allocated to each question serves as a guide to theexpected length of your answer. NOTE: Answer the questions set … Read more
SECTION C: SHORT STORIES In this section questions are set on the following short stories: QUESTION 5 Read the extracts from the TWO short stories and answer the questions set on each.The number of marks allocated to each question serves as a guide to the expectedlength of your answer. NOTE: Answer the questions set on … Read more
5.1 Read the passage (TEXT F) below, which has some deliberate errors, andanswer the set questions. 5.1.1 Correct the SINGLE error in EACH of the following sentences. Writedown ONLY the question numbers and the words you havecorrected. (a) Just like the people in most countrys, South Africans lovemusic.(1) (b) South Africa is home to many … Read more
5.1 Read the passage (TEXT F) below, which has some deliberate errors, andanswer the set questions. 5.1.1 Correct the SINGLE error in EACH of the following sentences.Write down ONLY the question numbers and the words you havecorrected. a) Nicholas Dyer, a award-winning wildlife photographer, lives hislife exploring Eastern and Southern Africa.(1) b) His home is … Read more