WAEC Chemistry Questions Chemistry WAEC 2022

 WAEC Chemistry Questions Chemistry WAEC 2022 Expo Questions is out now on our website. In this composition, I'll show you past WAEC Chemistry arbitrary repeated questions for free. All you need to do is to stay focused and follow this companion. 

 

 WAEC Chemistry Questions 2022 Objective and Theory Updates 

 

 

 

 

 

 The West African Examinations Council (WAEC) is an examination board that conducts the West African Senior School Certificate Examination, for University and Jamb entry examination in West African countries. 

 

 In a time, over three million campaigners registered for the examinations coordinated by WAEC. 

 

 Table of Contents 

 SCHEME OF EXAMINATION 

 

 There will be three papers, papers 1, 2 and 3 all of which must be taken. Papers 1 and 2 will be a compound paper to be taken in one sitting. 

 

 

 PAPER 1 

 

 This will comprise fifty multiple- choice objective questions drawn from Section A of the syllabus. They will bear campaigners to answer all the questions within 1 hour for 50 marks. 

 

 PAPER 2 

 

 This will be a 2-hour essay paper covering the entire syllabus and carrying a outside of 100 marks. The paper will be in two sections Sections A andB. 

 

 Section A This will comprise ten short structured questions drawn from the common portion of the syllabus ( i.e. Section A of the syllabus). They will bear campaigners to answer all the questions for 25 marks. 

 

 Section B This will comprise two questions from the common portion of the Syllabus ( i.e. Section A of the syllabus) and two other questions from the Section of the syllabus which is peculiar to the country of the seeker ( i.e. either) Section B or C of the syllabus). 

 

 

 

 They will bear campaigners to answer any three of the questions. Each question shall carry 25 marks. 

 

 PAPER 3 

 

 This shall be a 2-hour practical test for academy campaigners or1 hour 30 twinkles indispensable to practical work test for private campaigners. Each interpretation of the paper shall contain three mandatory questions and carry 50 marks. 

 

 The questions shall be on the following aspects of the syllabus 

 

 One question on quantitative analysis; One question on qualitative analysis; The third question shall test campaigners’ familiarity with the practical conditioning suggested in the syllabus. 

 

 

 WAEC Chemistry Ideal Questions 

 

 Then they're just for you! 

 

 1-10 CACDBDADAD 

 11-20 AADCDABBCD 

 21-30 BACBCCBCAC 

 31-40 CBACBCDBAD 

 41-50 DBBDCBCCCB 

 

 WAEC Chemistry Proposition Questions 

 

 SECTION A 

 

 1. Identify the solid remaining when each of the following is hotted. 

 (a) lithium trioxonitrate (V); 

 (b) potassium trioxonitrate (V); 

 (c) calcium trioxonitrate (V); 

 

 2. (a) When calcium oxide and coke are hotted in an electric furnace, the products are carbon (ii) oxide and calcium carbide (CaC2). Write the equation for this response. 

 

 (b) Addition of water to calcium carbide leads to the conformation of calcium hydroxide and ethyne. Write the equation for the product of ethyne. 

 

 3. Calculate the chance by mass of silicon tetrachloride. (2 marks) 

 4. Ammonia, NH3, and phosphine, Ph3, are the hydrides of the first two rudiments in group 5. 

 (a) Draw a fleck and cross illustration for the ammonia patch. (2 marks) 

( b) Sketch and explain the shape of the ammonia patch. (3 marks) 

 

 

 5. The first ionization energy of chlorine is 1. 

 (a) Define the term first ionization energy. 

 (b) State and explain the general trend in the values of the first ionisation energy for the rudiments across the period, sodium to argon in the periodic table. 

 

 6. Emulsion A comprises carbon and hydrogen only. The emulsion was plant to contain 80 carbon by mass. 

 (a) Calculate the empirical formula of emulsion A using the data over. 

 (b) The relative molecular mass of emulsion A was plant to be 30. 

 Use this information to conclude the molecular formula of emulsionA. 

 (H = 1.00 C = 12.00) 

 

 7. State two factors other than a change in temperature or the use of a catalyst that influences the rate of a chemical response. 

 

 SECTION B 

 

 1. (a) Two rudiments represented by the letters Q and R have infinitesimal figures 9 and 12, independently. 

 (i) Write the electron configuration ofR. 

 (ii) To what group does Q belong in the periodic table? 

 (iii) Write the formula of the emulsion formed when Q combines withR. 

 (iv) Explain compactly why Q is a good oxidizing agent. 

 (v) State whether R would be anticipated to form acidic or introductory oxide. 

 (b) (i) State two hypotheticals of the kinetic proposition of feasts. 

 (ii) When some solids are hotted, they change directly into the gassy state. What name is given to this miracle? 

 (iii) List two substances that parade the miracle mentioned in (ii). 

 (iv) Write an expression to show the fine relationship between the rate of prolixity of a gas and its vapour. 

 

 2. An waterless result has a pH of4.0. 

 (a) (i) What's the hydrogen ion attention of the result? 

 (ii) What effect will it have on litmus paper? 

 (iii) Which of the following swab results would have the same effect on acid test? Give a reason for your answer. NH4Cl (aq); Na-Cl (aq); CH3OON (aq). 

 (b) (i) Separate between a fine chemical and a heavy chemical. 

 (ii) Name two sources of air pollution. 

 (iii) Suggest one way of reducing air pollution in metropolises 

 

 Further QUESTION AND ANSWERS 

 

 3. (a) (i) Explain compactly the turmoil process. 

 (ii) Write a balanced equation for the turmoil of glucose. 

 (iii) What substance must you add to the glucose result to raise it? 

 (iv) Explain compactly why tightly corked glass filled to the brim with win wine shatters on standing. 

 (b) State one artificial operation of each of the following styles of separation 

 (i) Crystallization; 

 (ii) Fractional distillation. 

 (c) Explain the following terms 

 (i) Saponification; 

 (ii) Esterification. 

 (d) Write a balanced equation to illustrate each of the terms in (c). 

 (e) i) What's a hydrocarbon emulsion? 

 (ii) Name two top sources of hydrocarbons. 

 

 

 

 DISCLAIMER! These aren't real WAEC Chemistry questions but likely regular questions over the times to help campaigners understand the nature of their examinations. Insure to note every question handed on this runner. 

 

 Still, kindly give us with your phone number and dispatch address in the comment box below, If you need us to help you with further streamlined information at the right time about WAEC Chemistry Questions 2022. Also, ask any questions pertaining to this companion. 

 

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