SNGS 2024 TA1

This document consists of 12 printed pages. [Turn over Name: _______________________________ ( ) Class:___________ CHIJ ST NICHOLAS GIRLS’ SCHOOL Secondary 4 Termly Assessment 1 (35 Marks) ____________________________________________________________________________ Chemistry (6092) 2024 50 minutes ____________________________________________________________________________ READ THESE INSTRUCTIONS FIRST Write your name, register number, and class on all the work you hand in. Write in dark blue or black pen. You may use a soft pencil for any diagrams or graphs. Do not use highlighters, glue, correction fluid or correction tape. Answer all questions. Write all answers on the question paper. The use of a scientific calculator is expected, where appropriate. You are reminded of the need for clear presentation in your answers. A copy of the Periodic Table is provided on Page 2. The number of marks is given in brackets [ ] at the end of each question or part question. The total number of marks for this paper is 35. Marks Section A (5) Section B (20) Section C (10) Total

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3 Topics tested: Experimental techniques, mole concept, metals and electric cells. Section A : Multiple choice Questions (5 marks) Answer all questions in this section. Circle the correct answers in the table provided on page 5. 1 Solution X is a mixture of aqueous sodium hydroxide and aqueous sodium carbonate. Which apparatus could be used on its own to determine the number of moles of sodium carbonate present in solution X? A 1 only B 3 only C 1 and 2 D 2 and 3

4 2 The ionic equations for some reactions are as follows: Fe(s) + Cd2+(aq) → Fe2+(aq) + Cd(s) Sn(s) + Pb2+(aq) → Sn2+(aq) + Pb(s) Cd(s) + Sn2+(aq) → Cd2+(aq) + Sn(s) Which of the following pairs will result in a reaction? 1 Sn(s) + Fe2+(aq) 2 Cd(s) + Pb2+(aq) 3 Fe(s) + Pb2+(aq) A 1 only B 2 only C 3 only D 2 and 3 only 3 The diagram shows an electric cell. The electrolyte contains dilute sulfuric acid. Which statement about the cell is correct? A Electrons flow from magnesium to silver via the electrolyte. B Magnesium gives away electrons and gets oxidised but silver takes in electrons and gets reduced. C Magnesium gets smaller and silver remains unchanged in size. D The concentration of magnesium ions increases in the electrolyte and the electrolyte becomes more positively charged.

5 4 Iron forms a few oxides,