Question

colour of copper oxide and barriliam sulphate, cause of rancidity, formula for rust, formula for the green coloured coat on the surface of copper
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Answer 1

Answer:

• colour of copper oxide and barium sulphate is brown and white respectively
• exposure of oily food to air is the cause of rancidity
• formula for rust in iron is Fe2O3.XH2O
• that green coloured copper's compound is copper carbonate.

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