1.1 A bucket is at rest on a table.Which ONE of the following is the reaction force to the weight of the bucket, as described by Newton’s Third Law?A. Force of the table on EarthB. Force of the bucket on EarthC. Force of the bucket on the tableD. Force of the table on the bucket … Read more
Consider the balanced equation below for a hypothetical reaction that takes place in a sealed 2 dm3container at 300 K.2P(g) + Q2(g) ⇌ 2PQ(g) 6.1 Define the term chemical equilibrium. (2) 6.2 The amount of each substance present in the equilibrium mixture at 300 K is shown in the table below. The temperature of the … Read more
10.1 The incomplete equations below show the four steps involved in the industrial preparation of sulphuric acid (H2SO4). A and B represent two compounds. Write down the NAME or FORMULA of:10.1.1 Compound A (1) 10.1.2 Compound B (1) 10.1.3 The catalyst used in Step II (1) The sulphuric acid formed in Step IV is used … Read more
The diagrams below show two electrochemical cells in which carbon electrodes are used. In cell A, concentrated copper (II) chloride solution is used and in cell B, liquid aluminium oxide is used. 9.1 What type of electrochemical cell, ELECTROLYTIC or GALVANIC, is shownabove? Give a reason for the answer. (2) 9.2 Write down the:9.2.1 Half-reaction … Read more
8.1 When a piece of sodium metal (Na) is added to water in a test tube, hydrogen gas is released. When phenolphthalein indicator is added to the test tube, the solution turns pink. 8.1.1 Define the term reduction in terms of electron transfer. (2) 8.1.2 Write down the reduction half-reaction. (2) 8.1.3 Write down the … Read more
When light of various frequencies is incident on the metal cathode of a photocell,photoelectrons are emitted from the surface of the cathode.The graph below shows the relationship between the maximum kinetic energy (Ek(max))of an emitted photoelectron and the wavelength of the incident light. 10.1 Use the graph to determine the maximum kinetic energy of the … Read more
The diagram below is a simplified representation of an AC generator. The coil isrotated in a clockwise direction in the magnetic field. 9.1 Write down the name of component X. (1) 9.2 Write down the function of component Y. (1) 9.3 Use the relevant principle to explain why an emf is induced in the coil … Read more
Three resistors are connected to a battery with an unknown emf and unknown internalresistance r, as shown below.Ignore the resistance of the connecting wires. 8.1 In the definition of the emf of a battery given below, (a) and (b) representmissing words or phrases.The emf of the battery is the maximum (a) … supplied by a … Read more