9th Class Chemistry Chapter 7 Online Test (English Medium)

Welcome to the 9th class chemistry chapter 7 online test, specifically designed for English medium students. Chapter 7, “Electrochemistry,” bridges the gap between chemical reactions and electricity. This crucial chapter covers the fundamental concepts of oxidation and reduction reactions (redox reactions), teaching students the rules for assigning oxidation states. It also explores the practical applications of these reactions in electrochemical cells, distinguishing between electrolytic and galvanic cells.

To help you secure maximum marks in your board exams, we have structured this English medium online test to include all the important concepts, specifically focusing on oxidizing and reducing agents, as well as the prevention of corrosion (rusting), which are frequent targets in the objective portion of past papers.

By attempting this 9th chemistry chapter 7 online test, you can easily evaluate your exam readiness completely free of cost. Whether you are studying under the Lahore Board, Gujranwala Board, Rawalpindi Board, Multan Board, or any other Punjab Educational Board, these MCQs are designed strictly according to the latest English medium pairing scheme and syllabus. Once you submit the quiz, you will immediately see your result, helping you identify mistakes and improve your weak areas. Start your MCQ test below and boost your confidence for the final chemistry paper!

Topics Included in this Quiz:

  • Oxidation and Reduction Reactions

  • Oxidation States and Rules for Assigning Them

  • Oxidizing and Reducing Agents

  • Electrochemical Cells (Electrolytic and Galvanic Cells)

  • Electrochemical Industries (Manufacture of Sodium and NaOH)

  • Corrosion and its Prevention

9TH CHEMISTRY ONLINE TEST

9TH CHEMISTRY CHAPTER 7

📋 Online Test Guidelines

  • 📘 Test Type: MCQs (90 Questions | 90 Marks)
  • ⏱️ Time Allowed: 1 minute per question
  • 🔀 Shuffle Mode: Questions are randomized every time you start.
  • ⚠️ No Skipping: You must answer every question to proceed.
  • Submission: Once you finish the test, click See Results.

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1) The process of mixing an acid with a base is called:

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2) Which acid is used in the manufacture of ink?

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3) Which acid is found in rhubarb?

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4) Which acid is found in citrus fruits?

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5) Which acid is found in sour milk?

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6) Which acid is found in tomatoes?

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7) Which acid is used as a preservative for pickles?

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8) Which acid is used in the treatment of bone marrow?

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9) Which acid is present in tea?

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10) In a neutralization reaction, the products are:

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11) Which indicator is used to test acids and bases?

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12) The pH of a basic solution is:

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13) The pH of an acidic solution is:

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14) The pH of a neutral solution is:

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15) Acids react with metals to produce ...... gas?

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16) Which acid is used in the preparation of soap?

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17) Predict the main characteristic of the reaction of metals with acids:

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18) The gas produced by the reaction of acid and base is:

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19) A substance which can behave as an acid as well as a base is called:

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20) According to Brønsted and Lowry concept, an acid is a substance that can donate:

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21) Ammonia is a base because it:

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22) Which of the following is a Brønsted base?

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23) Which one is an Arrhenius acid?

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24) The formula of hydronium ion is:

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25) According to Arrhenius, an acid is a substance which dissociates in water and gives:

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26) Which one is not an Arrhenius acid?

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27) Which one is not an Arrhenius base?

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28) According to Arrhenius concept, an acid is a substance which dissociates in aqueous solution to give:

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29) Milk of magnesia contains Mg(OH)₂. It is used as an antacid. It neutralizes excess stomach acid. Which salt is formed in this reaction?

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30) Which of the following cannot be classified as an Arrhenius acid?

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31) ...... is a base?

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32) NH₃ is not ...... acid:

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33) All ...... acids are Brønsted-Lowry acids?

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34) Stomach acidity can be cured by taking ...... known as antacids:

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35) The percent ionization of acid having concentration 1.5 M is:

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36) ...... has a percent ionization of only 0.132%:

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37) Organic acids ionize up to ...... extent:

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38) Nitric acid ionizes in ...... step(s):

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39) Mineral acids are generally very ...... acids?

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40) The salt NaCl that is formed with water does not exist as ...... crystals?

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41) When a strong base and acid are dissolved in water, they completely dissociate into:

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42) Arrhenius also explained the process of:

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43) ...... molecules of water may surround the proton:

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44) Proton forms a strong bond with ...... of water?

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45) Proton has very high:

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46) ...... is very small in size?

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47) Who suggested that acid is a substance which dissociates in water to give H⁺ or H₃O⁺?

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48) Arrhenius suggested that acids and bases in terms of their behaviour in:

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49) The broader definitions of acids and bases were needed to explain their chemical properties at which level?

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50) Which compound in the following reaction is behaving as a conjugate base? CH₃COOH(aq) + H₂O(l) → CH₃COO⁻(aq) + H₃O⁺

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51) In a neutralization reaction between KOH and H₃PO₄, how many molecules of KOH will react with one molecule of H₃PO₄?

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52) How many hydroxide ions will calcium hydroxide release in water?

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53) Identify the oxide that is not basic in nature:

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54) Reaction between acids and bases is called:

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55) Oxides of non-metals are:

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56) Metallic oxides are in nature:

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57) Common name of sodium hydroxide is:

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58) Which acid is present in ant sting?

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59) Which one is not a mineral acid?

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60) The king of chemicals is:

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61) The common name of sodium hydroxide is:

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62) Which acid is present in the sting of ants?

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63) Which acid is known as "King of Chemicals"?

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64) Which acid is used as a laboratory reagent?

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65) Which acid is used in the softening of hard water?

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66) Which acid is used in the purification of gold and silver?

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67) Which acid is used in the pickling of metals?

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68) Which acid is used in car batteries?

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69) Which acid is used in the manufacture of explosives?

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70) Which acid is used in the manufacture of dyes?

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71) Which acid is used in the manufacture of fertilizers?

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72) The acid present in milk is:

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73) The acid present in apples is:

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74) The acid present in grapes is:

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75) The acid present in lemon is:

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76) The acid present in vinegar is:

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77) Which is the organic acid of natural source amla?

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78) Which is the organic acid of natural source curd?

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79) The natural source of oxalic acid is:

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80) Common example of man-made acids is:

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81) Acids which are obtained from natural sources are called ...... acids?

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82) Acids are divided into two types on the basis of:

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83) Which thing can be dissolved in water easily?

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84) Most of the acids are available in ...... form?

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85) Which substance has not bitter taste?

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86) In acids, the litmus colour changes from:

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87) Acids have been known for their ...... taste?

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88) Which of the following contains oxalic acid?

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89) While baking, which gas is responsible for raising the bread and making it soft?

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90) Which acid is not used as a food or mixed with food?

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