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Melaka Trial 2023 Chemistry Kertas 1 · UD3

1
Which of the following is the definition of an isotope?
2
Which chemical formula is correctly named according to the IUPAC nomenclature system?
3
Diagram 1 shows the structural formula for a substance found in a medicine that works to relieve pain. What is the relative molecular mass for the substance? [Relative atomic mass : H = 1, C = 12, N = 14, O = 16]
4
Which of the following transition elements is used in the process of making margarine and the Ostwald process?
5
Which substance is an ionic compound?
6
Diagram 2 shows the position of elements S and T in the Periodic Table of Elements. Which of the following is true in terms of the chemical formula and the type of bond formed between S and T.
7
A student has added 25 cm^3 of distilled water into a beaker containing 50 cm^3 of 0.5 mol dm^-3 copper (II) chloride solution, CuCl_2. Calculate the molarity of the new copper (II) chloride solution.
8
Which of the following substances are insoluble salts? I Barium sulphate II Magnesium chloride III Silver chloride IV Zinc sulphate
9
The following statement is an observation for the confirmatory test of cation of salt X. > White precipitate dissolves when ammonia solution is added into the salt solution of X in excess. What is cation of salt X?
10
Diagram 3 shows a graph of volume of oxygen gas collected against time in the decomposition reaction of hydrogen peroxide when using catalyst manganese (IV) oxide. Which point shows the highest rate of reaction?
11
Which of the following is the application of advanced ceramics?
12
Which of the following are the uses of oil and fat in daily life? I Source of nutrition II Bio fuel III Clothes IV Fertilisers
13
Which of the following reactions is an oxidation reaction?
14
The content of the antiseptic liquid contains homologous series Z. This homologous series is also used as a solvent in cough medicine. What is homologous series of Z?
15
Which of the following is non hydrocarbon?
16
Which of the following factors will increase the heat of combustion for alcohol?
17
Atom Q has the number of protons 11 and the number of neutrons 12. Where is the position of atom Q in the Periodic Table of Elements?
18
Which of the following is true about the properties of oxide of elements in period 3?
19
Diagram 4 shows the Periodic Table of Elements consisting of elements W, X, Y and Z. Which of the following elements forms a compound that can be used as an electrolyte in an electrolytic cell?
20
Which of the following will produce precipitate when mixed?
21
Table 1 shows the volume of carbon dioxide gas produced in the reaction between granule of calcium carbonate and hydrochloric acid. If the average rate of reaction in the fourth minute is 0.0625 cm^3s^-1. Calculate the value of x.
22
What is the oxidation number of sulphur in sulphuric acid, H_2SO_4?
23
Diagram 5 shows the set-up of apparatus of a chemical cell. Which of the following statements are correct about the cell? I Magnesium electrode acts as negative terminal II Copper electrode acts as negative terminal III Copper (II) ion undergoes oxidation reaction IV Copper (II) ion undergoes reduction reaction
24
Diagram 6 shows an apparatus set-up to study chemical properties of X carried out by a group of students in a laboratory. Which of the following is correct matches for X and Y?
25
S is a carboxylic acid that has three carbon atoms per molecule. What is the relative molecular mass of S? [Relative atomic mass : H = 1, C = 12, O = 16]
26
When ethanol is reacted with heptanoic acid, an ester with grape-like aroma is produced. Which of the following shows the structural formula for the ester?
27
Table 2 shows a part of the standard electrode potential series of half-cells for several chemicals. Which is the strongest oxidising agent?
28
The following chemical equation represents the displacement reaction of copper from its salt solution. Zn + Cu(NO_3)_2 -> Zn(NO_3)_2 + Cu When excess zinc powder is added into 50 cm^3 of 0.1 mol dm^-3 of copper (II) sulphate solution, the temperature of the mixture increases from 28.0°C to 40.0°C. What is the heat of displacement of copper? [Specific heat capacity of solution = 4.2 J g^-1°C^-1, density of solution = 1 g cm^-3]
29
Diagram 7 shows the formation of water droplet on the outer wall of the glass containing a cold drink. Which of the following statements is correct about observation in Diagram 7?
30
Which substance contains 6.02 x 10^23 atoms?
31
4.34 g of calcium carbonate reacts with 0.025 mol of sulphuric acid to form calcium sulphate as one of the reaction products. Determine the mass of calcium carbonate remaining after the reaction. [Relative atomic mass : H = 1, C = 12, O = 16, S = 32, Ca = 40]
32
The following information is about P atom and Q atom. - Element P is a metal. - The proton number of the Q atom is 12. - Element P is above element Q in the same group in the Periodic Table of Elements. Which of the following shows the electron arrangement of the P atom?
33
Diagram 8 shows a stock solution of copper(II) sulphate. If Amsyar wants to prepare 250 cm^3 of 0.5 mol dm^-3 copper (II) sulphate solution from a stock solution, what is the volume of stock solution needed?
34
A group of construction workers use concrete to build a building. They found that the wall of the building easily broken when exert high tensile forces. Which of the following is the suitable method to increase the ability of the concrete to withstand the force?
35
Which of the following statements are true? I Half of the cells that have a positive Eº value are more easily undergo oxidation II Half of the cells with a negative Eº value more easily undergo reduction III Half of the cells with a positive Eº value are more easily undergo reduction IV Half of the cells that have a negative Eº value are more easily undergo oxidation
36
Diagram 9 shows the neutralisation reaction between sulphuric acid and potassium hydroxide solution. The heat of neutralisation for the reaction is -57 kJ mol^-1. Calculate the highest temperature of the mixture if the average initial temperature of the mixture is 29.0 °C.
37
Diagram 10 shows the uses of a type of polymer produced through polymerisation reaction. Which of the following statements is true about the polymerisation?
38
Salt solution X reacts with Pb(NO3)2 solution to produce a white solid. Which of the following is correct to test the presence of anion for salt X?
39
Diagram 11 shows a situation that requires the use of modern medicine. Which of the following medicine is suitable to use in that situation?
40
Diagram 12 shows an apparatus set-up carried out by a group of students in laboratory. After 5 minutes, it was found that the bulb still did not light up. What step should be taken by the students to overcome the problem?
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