A silver article generally turns black when kept in the open for a few days. The article when rubbed with toothpaste again starts shining.
Name the black substance formed and give its chemical formula.

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Solution

The black substance is formed because silver (Ag) reacts with $H_{2} S$ present in the air. It forms a thin black coating of silver sulphide $(A g_{2} S)$

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A silver article generally turns black when kept in the open for a few days. The article when rubbed with toothpaste again starts shining. Name the black substance formed and give its chemical formula :

Question 38

A silver article generally turns black when kept in the open for a few days. The article when rubbed with toothpaste again starts shining.

(a) Why do silver articles turn black when kept in the open for a few days? Name the phenomenon involved.

(b) Name the black substance formed and give its chemical formula.

Q. A silver article generally turns black when kept in the open for a few days. The article when rubbed with toothpaste again starts shining. Silver articles turn black when kept in the open for a few days because of _________.

Q. Why do silver articles turn black when kept open for a few days?
(a) Name the phenomenon involved.
(b) Name the black substance formed and give its chemical formula.

a silver article turns black when kept in open for a few days

name the process involvrd

what is the black substance

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A silver article generally turns black when kept in the open for a few days. The article when rubbed with toothpaste again starts shining.Name the black substance formed and give its chemical formula.

The black substance is formed because silver (Ag) reacts with H2S present in the air. It forms a thin black coating of silver sulphide (Ag2S)

A silver article generally turns black when kept in the open for a few days. The article when rubbed with toothpaste again starts shining.
Name the black substance formed and give its chemical formula.

The black substance is formed because silver (Ag) reacts with $H_{2} S$ present in the air. It forms a thin black coating of silver sulphide $(A g_{2} S)$