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Chemistry - Chemical Reactions and Equations

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51. A dilute ferrous sulphate solution was gradually added to the beaker containing acidified permanganate solution. The light purple colour of the solution fades and finally disappears. Which of the following is the correct explanation for the observation? (NTSE Chandigarh, Stage-I, 2014-15)

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52. Fe20 3 + 2AI→A1203 + 2Fe, this reaction is an example of a;(NTSE Uttar Pradesh, Stage-I, 2015-16) (NTSE Chhattisgarh, Stage-I, 2016-17)

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53. Which one is a redox reaction? (NTSE West Bengal, Stage-I, 2015-16)

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54. Identify the correct oxidant and reductant in the following reaction

PbS + 4HP2  → PbS04 + 4H20 (NTSE Delhi, Stage-I, 2015-16)

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55. After white washing the shining finish given to the walls is due to the formation of (NTSE Karnataka, Stage-I, 2015-16)

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Chemical Reactions and Equations