Which form of copper is called blister copper ?
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How much copper can be obtained from 100 g of copper sulphate (CuSO4) ?
Answer: We have 1 mole of CuSO4 contains 1 mole of copper. Molar mass of CuSO4 = Atomic mass of [Cu × 1 + S × 1 + O × 4 ] =(63.5) + (32.00)...
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What changes in the colour of iron nails and copper sulphate solution do you observe after keeping the iron nails dipped in copper sulphate solution?
Iron nails become reddish brown in colour and solution becomes green in colour.
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after electroplating a spoon with copper, the connections of the copper plate and the spoon are interchanged. What will happen them explain?
If after electroplating a spoon with copper, the connections of the copper plate and the spoon are interchanged, the copper deposited on the spoon will start disappearing and going into...
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What happens when a. Dilute sulphuric acid is poured on a copper plate? b. Iron nails are placed in copper sulphate solution?
(a) When dilute sulphuric acid is poured on a copper plate, there will be evolution of hydrogen gas along with the formation of blue color crystals of copper sulphate. CuSO4 +...
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The process that you saw in Activity 14.7 is used for purification of copper. A thin plate of pure copper and a thick
Copper ion is positively charged. It is attracted towards the plate which is connected to the negative terminal of the battery. As copper ions are transferred to the thin copper...
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Write the method to produce copper matte from copper pyrites.
[Hint : Froth Floatation.]
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On heating blue coloured powder of copper (II) nitrate in a boiling tube, copper oxide (black), oxygen gas and brown gas (X) is formed.
(a) 2Cu(NO3)2 → 2CuO+ 4NO2+O2 (b) The brown gas 'X' has to be nitrogen dioxide. (c) This type of reaction falls under the category of Decomposition reactions. (d) The pH of the aqueous...
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Write the chemical formula of hydrated copper sulphate and anhydrous copper sulphate
(i) Hydrated copper sulphate – CuSO4.5H2O Anhydrous copper sulphate – CuSO4 Solutions Activity : (a) Heat a few crystals of copper sulphate in a dry boiling tube. (b) Add 2 – 3 drops of water...
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Copper is purified by electrolytic refining of blister copper. The correct statement(s) about this process is (are):
The correct answer is (B, C, D) Impure Cu is used as anode pure Cu deposited at cathode. Electrolyte is acidified solution of CuSO4. impurities settle as anode mud.
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The function of copper ions in copper releasing IUD's is :
(4) Cu2+ interfere in the sperm movement, which suppress the sperm motility and fertilising capacity of sperms.
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