3. Metals and Non-metals
medium

आपने ताँबे के मलीन बर्तन को नींबू या इमली के रस से साफ़ करते अवश्य देखा होगा। यह खट्टे पदार्थ बर्तन को साफ़ करने में क्यों प्रभावी हैं?

Option A
Option B
Option C
Option D

Solution

Copper reacts with moist carbon dioxide in air to form copper carbonate and as a result, copper vessel loses its shiny brown surface forming a green layer of copper carbonate. The citric acid present in the lemon or tamarind neutralises the basis copper carbonate and dissolves the layer. That is why, tarnished copper vessels are cleaned with lemon or tamarind juice to give the surface of the copper vessel its characteristic lustre.

Standard 10
Science

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