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Metals and non-metals react with oxygen ...

Metals and non-metals react with oxygen to give oxide are basic in nature while oxides formed by non-metals are acidic in nature. The nature of oxides can be determiend by testing the aqueous solution of oxide with litmus paper.
Q. Phosphorus is burnt in air to give phosphorus pentoxide. it is dissolved in water and tested with litmus paper. mark the correct observation.

A

Red litmus paper turns blue

B

Blue litmus paper turns red

C

There is no change in the litmus paper

D

Red litmus paper changes to green

Text Solution

Verified by Experts

The correct Answer is:
B
Phosphorus is a non-metal, hence phosphorus pentoxide is acidic in nature.
`P_(4)O_(10)+6H_(2)O to 4H_(3)PO_(4)` (Phosphoric acid)
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Knowledge Check

  • Metals and non-metals react with oxygen to give oxide are basic in nature while oxides formed by non-metals are acidic in nature. The nature of oxides can be determiend by testing the aqueous solution of oxide with litmus paper. Q. The oxides of non-metals are acidic oxides because they dissolve in water to give ____

    A
    alkalies
    B
    acids
    C
    carbonates
    D
    sulphates.

  • Metals and non-metals react with oxygen to give oxide are basic in nature while oxides formed by non-metals are acidic in nature. The nature of oxides can be determiend by testing the aqueous solution of oxide with litmus paper. Q. Magnesium ribbon on burning in air gives a white powder which when dissolved in water turns red litmus blue. the reason for this change is that

    A
    MgO is a basic oxide
    B
    MgO is an acidic oxide
    C
    MgO is a very reactive oxide
    D
    MgO is not a reactive oxide

  • Oxides of non-metals are...... in nature.

    A
    basic
    B
    acidic
    C
    neutral
    D
    all of these

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