Question Detail

CHM 102 Group II Objective Question
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Question

Which reaction describes the formation of calcium hydroxide from its oxide?
Options
A Ca(s) + O₂(g) → CaO(s)
B CaO(s) + H₂O(l) → Ca(OH)₂(aq)
Correct Answer
C Ca(OH)₂(s) + CO₂(g) → CaCO₃(s) + H₂O(l)
D CaCl₂(aq) + 2NaOH(aq) → Ca(OH)₂(s) + 2NaCl(aq)
Correct Answer

Option B is the correct answer.

Detailed Explanation

Page 7 shows the reaction: 'CaO(s) + H₂O(l) → Ca(OH)₂(aq).' Option A is oxide formation, C is decomposition, and D is precipitation of Mg(OH)₂ from MgCl₂ (though a similar reaction could occur for Ca).

Hint

The question asks for the formation of hydroxide *from its oxide*.

Question Info

Course: CHM 102
Topic: Group II
Type: Objective
Difficulty: Not specified
Question 1996 of 1999
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