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Periodic Table and Periodicity question

2020 · 9 Jan · Shift 1 · Q21
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Periodic Table and Periodicity question

2020 · 9 Jan · Shift 1 · Q21

JEE MainChemistryPeriodic Table and PeriodicityMCQ+4 / −1
The acidic, basic and amphoteric oxides, respectively, are :
  1. A
    Cl2OCl_2OCl2​O, CaOCaOCaO, P4O10P_4O_{10}P4​O10​
  2. B
    N2O3N_2O_3N2​O3​, Li2OLi_2OLi2​O, Al2O3Al_2O_3Al2​O3​
  3. C
    MgOMgOMgO, Cl2OCl_2OCl2​O, Al2O3Al_2O_3Al2​O3​
  4. D
    Na2ONa_2ONa2​O, SO3SO_3SO3​, Al2O3Al_2O_3Al2​O3​
View written solutionFree

Correct answer: B

  1. Recall the definitions

    • Acidic oxides: generally non-metal oxides that form acids with water or react with bases.
    • Basic oxides: generally metal oxides that react with acids.
    • Amphoteric oxides: oxides that react with both acids and bases.
  2. Common examples

    • Acidic oxides: CO2CO_2CO2​, SO2SO_2SO2​, SO3SO_3SO3​, N2O3N_2O_3N2​O3​, P4O10P_4O_{10}P4​O10​, Cl2OCl_2OCl2​O
    • Basic oxides: Na2ONa_2ONa2​O, K2OK_2OK2​O, Li2OLi_2OLi2​O, CaOCaOCaO, MgOMgOMgO
    • Amphoteric oxides: Al2O3Al_2O_3Al2​O3​, ZnOZnOZnO, BeOBeOBeO
  3. Check each option in the required order: acidic, basic, amphoteric

    Option A: Cl2OCl_2OCl2​O, CaOCaOCaO, P4O10P_4O_{10}P4​O10​

    • Cl2OCl_2OCl2​O is an acidic oxide.
    • CaOCaOCaO is a basic oxide.
    • P4O10P_4O_{10}P4​O10​ is also an acidic oxide, not amphoteric.

    Hence, A is incorrect.

    Option B: N2O3N_2O_3N2​O3​, Li2OLi_2OLi2​O, Al2O3Al_2O_3Al2​O3​

    • N2O3N_2O_3N2​O3​ is an acidic oxide.
    • Li2OLi_2OLi2​O is a basic oxide.
    • Al2O3Al_2O_3Al2​O3​ is an amphoteric oxide.

    Hence, B is correct.

    Option C: MgOMgOMgO, Cl2OCl_2OCl2​O, Al2O3Al_2O_3Al2​O3​

    • MgOMgOMgO is basic, not acidic.
    • Cl2OCl_2OCl2​O is acidic, not basic.
    • Al2O3Al_2O_3Al2​O3​ is amphoteric.

    Order is wrong, so C is incorrect.

    Option D: Na2ONa_2ONa2​O, SO3SO_3SO3​, Al2O3Al_2O_3Al2​O3​

    • Na2ONa_2ONa2​O is basic, not acidic.
    • SO3SO_3SO3​ is acidic, not basic.
    • Al2O3Al_2O_3Al2​O3​ is amphoteric.

    Order is wrong, so D is incorrect.

  4. Final answer

    The acidic, basic and amphoteric oxides respectively are: N2O3, Li2O, Al2O3N_2O_3,\ Li_2O,\ Al_2O_3N2​O3​, Li2​O, Al2​O3​ So the correct option is B.

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