(i) 2-Ethyl anthraquinone is reduced to 2-ethyl anthraquinol by H2 in the presence of palladium. (ii) This 2-ethyl anthraquinol is oxidised by air to 2-ethyl anthraquinone again. Then H2O7 (20% solution) forms.
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52.Out of H2SO4 and H3PO4, which is preferred to prepare H2O2?
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53.
Why is 2-anthraquinol preferred in the commercial preparation of H2O2?
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54.
Is H2O2 a strong acid in aqueous solution?
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55.
Give a test to identify H2O2.
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56.
How decomposition of H2O2 is accelerated ?
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57.
How decomposition of H2O2 is prevented?
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58.
Explain why hydrogen peroxide is used to restore old lead paintings in museums ?
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Long Answer Type
59.Justify the position of hydrogen in the periodic table on the basis of its electronic configuration.
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Short Answer Type
60.Give examples showing electropositive character of hydrogen.
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