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Reactivity with Air CO2 and Water (Group 1)

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Question

how will you show the presence of acidic oxide during the decomposition of ferrous sulphate heptahydrated

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Solution

Dear Student,
Ferrous sulphate heptahydrate on heating first looses water of crystallization to form anhydrous ferrous sulphate and then decomposes to form ferric oxide with the evolution of sulphur dioxide and sulphur trioxide.
$F e S O_{4} . 7 H_{2} O \overset{∆}{\to} F e S O_{4} + 7 H_{2} O 2 F e S O_{4} \overset{∆}{\to} F e_{2} O_{3} + S O_{2} + S O_{3}$
The sulphur trioxide (SO₃) and sulphur dioxide (SO₂) on dissolution in water forms Sulphuric acid (H₂SO₄) and sulphurous acid (H₂SO₃) respectively hence proving that acidic oxide is present during decomposition of ferrous sulphate

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Q. Question 49(d)
An element X which is a yellow solid at room temperature shows catenation and allotropy. X forms two oxides which are also formed during the thermal decomposition of ferrous sulphate crystals and are the major air pollutants.

What would be the nature (acidic/ basic) of oxides formed?

Q. Question 49 (c)
An element X which is a yellow solid at room temperature shows catenation and allotropy. X forms two oxides which are also formed during the thermal decomposition of ferrous sulphate crystals and are the major air pollutants

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Q. Question 49 (b)
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