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Number of acidic or amphoteric oxides in a given list

This type of question, asked 4 times: 14 Jun 2022, 25 Jul 2022, 29 Jan 2023, 1 Feb 2024. All 4 questions below, oldest first.

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  1. Question 1

    14 Jun 2022

    36
    Given below are the oxides: Na2O,As2O3, N2O,NONa_{2}O,As_{2}O_{3},{\text{ }N}_{2}O,NO and Cl2O7Cl_{2}O_{7} Number of amphoteric oxides is:

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  2. Question 2

    25 Jul 2022

    130
    The total number of acidic oxides from the following list is: NO,N2O,B2O3, N2O5,CONO,N_{2}O,B_{2}O_{3},{\text{ }N}_{2}O_{5},CO, SO3,P4O10SO_{3},P_{4}O_{10}

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  3. Question 3

    29 Jan 2023

    142
    Total number of acidic oxides among N2O3,NO2, N2O,Cl2O7,SO2,CO,CaO,Na2ON_{2}O_{3},NO_{2},{\text{ }N}_{2}O,Cl_{2}O_{7},SO_{2},CO,CaO,Na_{2}O and NONO is____

  4. Question 4

    1 Feb 2024

    58
    Among the following oxide of pp - block elements, number of oxides having amphoteric nature is Cl2O7,CO,PbO2, N2O,NO,Al2O3,SiO2, N2O5Cl_{2}O_{7},CO,PbO_{2},{\text{ }N}_{2}O,NO,Al_{2}O_{3},SiO_{2},{\text{ }N}_{2}O_{5}, SnO2SnO_{2}