Question

Rishi burnt a magnesium ribbon, and it burnt with a dazzling white flame. A powdery ash was formed.
He collected the ash and dissolved it in water. The product formed and nature of the product could
be
[SOF-2011]
(A) MgO, acidic (B) MgO, basic (C) Mg(OH),, basic (D) Mg(OH), acidic​

Answer 1

C Mg(OH) is right option b

Answer 2

$\huge\fcolorbox{black}{teal}{Solution:-}$

✏️ Answer:-

★ option (c) Mg(OH)2 - basic.

✏️ Explanation:-

★ → Combustion of magnesium in air (oxygen):-

Mg (Magnesium) + O2 (Oxygen) → MgO (Magnesium Oxide - ash)

→ Reaction of Magnesium Oxide with Water:-

MgO + H2O → Mg(OH)2 (Magnesium Hydroxide)

• Now, when magnesium hydroxide is tested, we notice that it turns red litmus blue and phenolphthalein pink, therefore, one can conclude that it is basic in nature.

° Hence, option (c) Mg(OH)2 - basic is the right answer.

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I hope this helps! :)