Hydrogen peroxide is used to restore the colour of old oil paintings containing lead oxide. Write a balanced equation for the reaction that takes place in this process.

Solution

When an oil painting is constantly exposed to the atmosphere, the traces of hydrogen sulphide gas present in the atmosphere slowly blackens the painting by converting lead oxide (white) to lead sulphide (black).
$PbO with White below space plus space straight H subscript 2 straight S space space rightwards arrow space space space PbS with Black below space plus space straight H subscript 2 straight O$
Now, when the painting is dipped in a dilute solution of H₂O₂ for some time, lead sulphide is slowly oxidised to white lead sulphate.
$PbS space plus space 4 straight H subscript 2 straight O subscript 2 space space rightwards arrow space space space PbSO subscript 4 space plus space 4 straight H subscript 2 straight O$
Thus the colour of lead painting is restored.

Some More Questions From Hydrogen Chapter

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Hydrogen

Hydrogen peroxide is used to restore the colour of old oil paintings containing lead oxide. Write a balanced equation for the reaction that takes place in this process.

Some More Questions From Hydrogen Chapter

Which isotope of hydrogen is used as a tracer in organic reactions ?

Hydrogen is the lightest gas. Still its use in filling balloons has been discarded. Why?

Hydrogen forms both H⁺ ion and H^-ion. Explain.

What is the molecular mass of a compound formed when tritium is burnt in air?

Out of H₂ and D₂ which has higher boiling point and why?

Give one use of liquid hydrogen.

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For Daily Free Study Material Join wiredfaculty

Hydrogen

Hydrogen peroxide is used to restore the colour of old oil paintings containing lead oxide. Write a balanced equation for the reaction that takes place in this process.

Some More Questions From Hydrogen Chapter

Which isotope of hydrogen is used as a tracer in organic reactions ?

Hydrogen is the lightest gas. Still its use in filling balloons has been discarded. Why?

Hydrogen forms both H+ ion and H- ion. Explain.

What is the molecular mass of a compound formed when tritium is burnt in air?

Out of H2 and D2 which has higher boiling point and why?

Give one use of liquid hydrogen.

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

Hydrogen forms both H⁺ ion and H^-ion. Explain.

Out of H₂ and D₂ which has higher boiling point and why?