Ferrous sulphate decomposes with the evolution of a gas having a characteristic odour of burning sulphur. Write the chemical reaction involved and identify the type of reaction.
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Saloni took a piece of burning charcoal and collected the gas evolved in a test tube. a. How will she find the nature of the gas?
(a) Add a few drops of water in the test tube containing gas. Now, cover the test tube and shake it well. After shaking, test the solution with blue litmus...
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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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Ferrous sulphate decomposes with the evolution of a gas having a characteristic odour of burning
2FeSO4(s) +Heat -----> Fe2O3(s) + SO2(g) + SO3(g) It is a thermal decomposition reaction.
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What is the colour of ferrous sulphate crystals? How does this colour change after heating
The colour of ferrous sulphate crystals is green. On heating, FeSO4.7H2O first decomposes to form anhydrous ferrous sulphate (FeSO4) which is white in colour.
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When ferrous sulphate crystals are heated, the colour of the residue formed is __ (A) red (B) brown
The correct answer is (B) brown
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During the experiment of heating of ferrous sulphate crystals, four students recorded their observations as:observations as:
(B) (i), (iv)
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On heating ferrous sulphate crystals, one would get (A) sweet smell (B) rotten egg smell
(C) irritating choking smell
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The odour of acetic acid resembles that of (A) rose (B) burning plastic
The correct answer is (C) vinegar
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An aluminium strip is kept immersed in freshly prepared ferrous sulphate solution taken in a test tube.
Al displaces Fe from FeSO4 and forms Al2(SO4)3 which is colourless. The lower end of the test tube becomes warm.
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2g of ferrous sulphate crystals were heated in a hard glass test tube and observations recorded.
(i) Green to white, then brown (ii) Water (iii) As of burning sulphur (iv) Ferric oxide, sulphur dioxide, sulphur trioxide (v) Decomposition reaction
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