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    Home » True False Assignment Chemical Reactions and Equations

    True False Assignment Chemical Reactions and Equations

    Dr. Vikas JasrotiaBy Dr. Vikas JasrotiaSeptember 28, 2020Updated:June 7, 2023No Comments
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    The Post True False Assignment Chemical Reactions and Equations contains subjective questions along with fill-ups and true-false type questions. This will help the students in improving the chapter knowledge.

    True False Assignment Chemical Reactions and Equations

    Q 36. Choose the correct about rancidity (i) Rancidity is a reduction process (ii) Rancidity is an oxidation process

    Q 37. When silver coloured metal (A) is added to dilute sulphuric acid, solution (B) is formed which is a colourless solution and a gas (c) is evolved which is the colourless name ‘A’, ‘B’ and ‘C’ and write the equation?

    Q 38. An ‘A’ blue coloured crystalline salt on heating decomposes to ‘B’ white substance. When in a blue salt solution, a metal (Zinc) is added, it gives rise to colourless solution ‘C’ with leaving behind ‘D’ reddish-brown metal. Name the compounds ‘A’, ‘B’, ‘C’ and ‘D’

    Q 39. A mixture of Chromium Oxide is heated with Aluminium powder:                                                                                                  a) Write the reaction?                                b). Give one application of this reaction?

    Q 40. Choose and state as true or false

    • In an exothermic reaction, heat is evolved. True / False
    • Decomposition is possible by thermal decomposition, electrolytic decomposition and by photochemical decomposition. True / False
    • The displacement reaction of metals is based on reactivity series of metals. True / False
    • The oxidising agent is a substance that causes the addition of oxygen or the removal of hydrogen from other substances. True / False
    • The reduction is a process that involves the removal of hydrogen and the addition of oxygen. True / False

    Q 41. Give a word fill in the blank

    • The substance which causes the addition of oxygen or removal of hydrogen from other substances is … …….. agent.
    • The presence of air, the presence of moisture, the presence of salt in water, electropositive metals leads a metal to ……… …
    • …… …………metals are less electropositive and hence they do not corrode in moist air.
    • A reaction in which an insoluble product formed during the reaction of two ionic compounds in an aqueous solution is called ……. reaction.
    • A substance that causes the addition of Hydrogen or removal of Oxygen from another substances is called ……….
    • The arrangement of elements in decreasing order of their electropositive character is called ………
    • When sodium metal is added to water, it gets …….
    • In the order of decreasing order of reactivity in Ca > Al > Zn > H > Ag > Pt The most reactive metal is …………….
    • In the order of decreasing order of reactivity as stated above the least reactive metal is …………………
    • In the order of Ca > Al > Zn > H > Ag > Pt Choose the metal which from above can react with all the salt solutions. ……………

     

    Activity-based One line – Two-line quiz questions

    Q 42. Why do we preserve Sodium metal in kerosene oil?

    Q 43. What happens when we heat coloured crystalline copper sulphate?

    Q 44. In electrolysis of water, on which electrode does hydrogen migrates and why?

     Q 45. What happens when quick lime is added to water? Name the reaction and compounds formed.

     Q 46. What happens to green coloured Iron sulphate crystals on heating?

    Q 47. Why does the white precipitate of AgCl change to grey on exposure to light?

     Q 48. Why does silver or gold not react easily when exposed to air or light?

     Q 49. Why does ZnSO4 solution not react with Cu(s)?

     Q 50. How would you conclude that rusting is a slow electrochemical reaction?

     

    To check answers click the link below
    https://sciencemotive.com/class-10/answers-true-false-chemical-reactions-and-equations/

     

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