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Chemistry Grade 10 Unit 3: Important Inorganic Compounds

national exam questions have come from this unit. It runs 57 pages; one careful study pass takes about 6.5 hours, and its difficulty is easier among Chemistry units. Each section below lists the questions set from it, with the year, and opens the page that teaches it.

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3.1 Introduction · read p. 110
Not asked in a national paper yet.
3.2 Oxides · read p. 111
  • 2018 E.C., Q38 – Which of the following oxides is classified as an amphoteric oxide?
  • 2016 E.C., Q45 – Which of the following is peroxide?
  • 2015 E.C., Q47 – Which of the following compounds reacts with basic oxide to form salt and water?
  • 2006 E.C., Q39 – Which of the following statements is true?
3.3 Acids · read p. 122
  • 2018 E.C., Q51 – During laboratory class, a student placed clean water in a beaker and added pieces of calcium metal using tongs. Which of the following is observed color after the reaction has completed?
  • 2017 E.C., Q40 – During laboratory class, a student placed clean water in a beaker and added pieces of calcium metal using tongs. After the reaction is completed, he/she tested the solution using red litmus paper. Which of the following
  • 2016 E.C., Q53 – A student collected few leaves from his/her backyard, brought it to their class and prepared a litmus paper since in a beaker. They got blue and red litmus papers from his/her teacher and placed few drops of the beaker l
  • 2016 E.C., Q48 – The hydrogen ion concentration in a certain solution at 25 °C is 10 × 10 -6 M. What is the pH of this solution?
  • 2016 E.C., Q25 – A student prepared two beakers, each containing 100 mL of water. The student dissolved 10 mL of concentrated HCl in the first beaker and 10 mL of concentrated CH 3 COOH in the second beaker, which of the following would
  • 2016 E.C., Q46 – Among the following which one is a ternary acid?
  • 2011 E.C., Q39 – The pH of a solution prepared by the addition of 100 mL 0.002 M HCl to 100-mL distilled water is closest to:
  • 2009 E.C., Q33 – Which statement about indicators is always correct?
  • 2007 E.C., Q70 – A 0.1M solution of HCl is dissolved in water. What species of ions are present at equilibrium, and what will be their equilibrium concentrations? [H O ] = 3 + 0.1M [OH ] = − 10 M −13 [Cl ] = − 0.1M [H O ] = 3 + 0.1M [OH
3.4 Bases · read p. 140
  • 2014 E.C., Q35 – Which of the following does represent a general property of a base?
  • 2007 E.C., Q53 – An aqueous solution contains $0.100\,\mathrm{M}\ \mathrm{NaOH}$ at $25.0^\circ\mathrm{C}$. The PH of the solution is?
  • 2007 E.C., Q43 – Which of the following is used in the reaction called saponification?
  • 2007 E.C., Q65 – Which of the following describes the balanced molecular equation when perchloric acids is mixed with solid iron (III) hydroxide?
  • 2005 E.C., Q39 – What is the pH of 0.005 M solution of $\mathrm{Ca(OH)_2}$?
3.5 Salts · read p. 148
  • 2018 E.C., Q39 – Which of the following statements correctly applies to the formation and nature of salts? I. NaHSO₄ is a normal salt because all ionizable H⁺ from the acid are replaced. II. NaHSO₄ is acidic salt formed when ionizable H⁺
  • 2016 E.C., Q23 – Which of the following reaction is used for the preparation of bases?
  • 2015 E.C., Q4 – Which one of the following is an essential nutrient of plants?
  • 2014 E.C., Q39 – Sodium carbonate is a basic salt because it is a salt of
  • 2011 E.C., Q75 – Which of the following compounds is the least soluble in water?
  • 2011 E.C., Q53 – The indicator methyl red is red in a solution of NaH₂PO₄. Which of the following equations is consistent with this observation?
  • 2005 E.C., Q71 – What is the pH of an aqueous solution prepared to contain M sodium nitrite ( ) if the acid dissociation equilibrium constant, for nitrous acid ( ) is ?
  • 2005 E.C., Q11 – Which one of the following is TRUE for salts formed from strong acids and strong bases?