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Form 4 Chemistry Paper 1 Sample Revision Questions With Answers

Lessons (20)

1. Elements G and T have atomic number 20 and 9, respectively. a).Write down the electronic arrangement of the ion of G. (b) Which element has the same electronic arrangement as the ion of T? (c) Write the formula of compound formed by reaction of G and T.
2m 46s
2. Explain the observation made in the experiment whose set up is shown below.
1m 39s
3. A #10 cm^3# volume of concentrated hydrochloric acid of density 1.18 g/#cm^3# and purity of 36 percent dissolved in #250 cm^3# of distilled water. Calculate the morality of the solution. (H = 1, Cl = 35.5)
3m 9s
4. Study the equation below and answer the question that follow. Identify the acid in the forward reaction. Give a reason for your answer.
2m 49s
5. Sulphur (IV) oxide was bubbled into acidified bromine water followed by addition of a solution of barium chloride. State and explain the observations made.
1m 43s
6. a).When heated in a current of nitrogen gas, magnesium reacts to form a compound. Write the chemical equation of the compound formed.
3m 16s
7. Study the set-up below and answer the questions that follow.
2m 19s
8. The flow diagram below shows the extraction of Zinc metal. Study it and answer the question that follow.
4m 54s
9. An oxide of Nitrogen was bubbled into a solution of sodium hydroxide in which phenolphthalein indicator has been added. The solution turned colorless after sometime. a).Name the oxide.
2m 23s
10. a).State the Gay Lussac’s Law. b). Ethene reacts with oxygen according to the equation:
3m 35s
11. In an experiment, iron was heated in the presence of excess oxygen and the following data was obtained. Mass of empty crucible = 10.98 g Mass of crucible + iron before reaction = 12.66 g Mass of crucible + iron after heating = 13.30 g Calculate the empirical formula of the oxide of iron. (Fe =56, O = 16)
3m 34s
12. Using reagents provided, explain how you could prepare dry zinc carbonate solid.Zinc powder, dilute nitric (V) acid, Water and Solid sodium carbonate
2m 27s
13. Use the bond energy values given below to determine the enthalpy change for the conversion of propene to propane by hydrogenation.
5m 38s
14. Element Q reacts with dilute acids but not cold water. Element R does not react with dilute acids. Elements S displaces element P from its oxides. P reacts with cold water. Arrange the four metals in order of their reactivity starting with the least reactive.
1m 44s
15. Calculate the number of aluminum ions in #250 cm^3# of 0.1 M aluminium sulphate (Avogadro’s Constant = #6.0 times 10^23#)
2m 19s
16. Nitrogen may be isolated from air or from the reaction between ammonium chloride and sodium nitrite. a).(i) State the condition necessary for the production of nitrogen from ammonium chloride and sodium nitrite.
1m 46s
17. Ammonia nitrate is one of the nitrogenous fertilizers manufactured from nitrogen compounds. a).Identify the reagents used to manufacture ammonium nitrate.
2m 11s
18. Write the formula of the complex ion formed in each of the reactions described below. (a) Zinc metal dissolves in hot alkaline solution
0m 55s
19. a).What is half-life? b) Archeologists can determine the age of organic matter by measuring the proportion of carbon-14 present in a sample. Assuming that carbon-14 has a half- life of 5600 years, calculate the age of a piece of wood found to contain #1/8# as much carbon-14 as in a living material.
3m 7s
20. Study the information given below for magnesium and calcium. a).Explain the trend in ionization energies between magnesium and calcium.
4m 24s

Form 4 Chemistry Paper 1 Sample Revision Questions With Answers

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