A new iron nail is placed in a beaker containing aqueous copper sulphate solution. When the nail is taken out after 15 minutes, its surface is coated with _______.
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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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A nail is inserted in the trunk of a tree at a height of 1 metre from the ground level. After 3 years the nail will
(c) remain at the same position
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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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Abida and Ramesh were doing an experiment in which water was to be heated in a beaker. Abida kept the beaker near the wick
The water in the Ramesh's beaker will heat up in a shorter time. This is because the outermost zone of a flame is the hottest zone, while the yellow zone...
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A dilute ferrous sulphate solution was gradually added to the beaker containing acidified
Potassium permanganate solution (KMnO4) is an oxidising agent. It oxidises ferrous sulphate (FeSO4) to ferric sulphate [Fe2(SO4)3].
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A small amount of quick lime is taken in a beaker. Water is added slowly to the beaker. Which of the following observations will be noted?
(A) Hissing sound and the solution becomes hot.
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When iron nails are kept in copper sulphate solution for 30 minutes, the colour of solution changes to
(D) light green
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One student was assigned the experiment of interaction of iron nail with a solution of copper sulphate.
i. a. Initial colour of the copper sulphate solution was blue. b. After completion of reaction,colour of the solution changes to light green. ii. In this reaction,colour of solution changes from blue...
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What is the coordination entity formed when excess of aqueous KCN is added to an aqueous solution of copper sulphate?
i. When excess of aqueous KCN is added to an aqueous solution of copper sulphate, the coordination entity formed is [Cu(CN)4]2 -. [Cu(H2O)4]2+ + 4CN - → [Cu(CN)4]2 - + 4H2O ii. [Cu(CN)4]2- is...
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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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