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Chemistry Level 4

A compound \(A\) when treated with \( B\) and then fused with a deliquescent substance \(C\) gives\( F\) which turns brown-red on exposure to air. When\( B\) is added to to\( D\) the gas produced turns into white fumes of \(E \)on exposure to\( G\). Also when a solution of \(D\) is treated with Manganese dioxide, fumes which bleach litmus and turn iodised starch paper blue are produced. When \(D\) is treated with \(C\) a white precipitate of \(H\) is produced which dissolves in excess \(C\). \(D\)(aq) also produces the white precipitate \(H\) on treatment with \(E\) and excess of \(G\). A boils at \(80^\circ\)C.\( F\) reacts with \(C\) and carbon dioxide followed by acidification to produce \(K\) which decomposes Sodium bicarbonate. Acetylated \(K\) is is an antipyretic.

Find the sum of the molecular mass of \(A\) and degree of unsaturation of \(K\) and molecular mass of \(D\) to one decimal place.

Note: Read these only if you feel the problem has insufficient information:

  • \(A\) can be obtained from F after treatment with the metal present in philosopher's wool.

  • \(H\) on excess heating produces a refractory material.

  • \(C\) is the hydroxide of the metal lying below the chief metal of lepidolite ore in the periodic table.


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