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Atomic Structure Revision Questions and Answers (O level Chemistry) Question 1 The table shows some information about six particles. Complete the table. Particle Proton (atomic) number Number of neutrons Number of electrons 35Cl 17 18 ……… ……….. 17 20 17 39K+ 19 ……… 18 79Br– ……… 44 36 81Br 35 ……… 35 ……….. 37 48…
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Organic Chemistry Questions and Answers (O level Chemistry) Organic chemistry deals with the compounds of carbon, except for carbonates and carbon dioxide. The following is a list of organic chemistry questions and expected answers for O level chemistry students. The first question is about ethanol (from the alcohols functional group) and ethene (from the alkenes…
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Question 1 (a) The diagram below shows how an organic compound, Q,is produced from ethene. (i) Name reagent x and compound P. (ii) Draw the displayed structural formula of Q. (iii) Give any two uses of P. (iv) Describe any one chemical test that is used to distinguish ethene from P. (b) The diagram below…
Question 1 (a) A student prepared a blue solution, P, by adding black copper (II) oxide powder to nitric acid as shown below.’ (i) Name two chemical substances in the blue solution. (ii) State two observations made by the student. (iii) Write a balanced chemical equation for the reaction. (b) Write a balanced chemical equation…
Question 1 Choose from the following substances to answer the questions below . copper(II) chloride chlorine ethanoic acid hydrochloric acid manganese(IV) oxide platinum potassium dichromate(VI) sodium chloride sulphuric acid vanadium(V) oxide Each substance can be used once, more than once or not at all. Name a substance which (a) is a catalyst in the Contact…
Question 1 Ethanol, CH3CH2OH, is a liquid fuel. Ethanol can be manufactured either from glucose, C6H12O6, or from ethene. (a) Briefly describe the manufacture of ethanol from glucose. Include the balanced equation in your answer. (b) (i) Draw the displayed formula for ethene. (ii) Name the substance that reacts with ethene to make ethanol. (iii)…
Question 1 (a) Copper can be extracted from molten copper chloride using electrolysis. The apparatus is shown below: (i) State whether this process for the extraction of copper involves a chemical change or a physical change. Explain your answer. [1] (ii) Identify the two ions present in the electrolyte and describe, in terms of electrons,…
O level Chemistry Questions and Answers(1) This question is for O ‘Level Chemistry. It covers concepts from atomic structure, electronic configuration, periodic trends and atomic bonding. Question 1 The table below shows the electronic arrangements of seven elements, A to G. Element Electronic arrangement A 2.1 B 2.6 C 2.8 D 2.8.1 E 2.8.6 F…
