MCQChemistry

NCERT · Class 12 · Chemistry · Coordination CompoundsAccording to Werner's coordination theory, which of the following statements is true?

Step-by-Step Solution

Werner's theory postulates that metal complexes have two types of valency: primary valency (ionisable, corresponding to oxidation state) and secondary valency (non-ionisable, corresponding to coordination number). Secondary valencies are directed towards fixed positions in space, giving a definite geometry to the complex, whereas primary valencies are non-directional.

Detailed Options Breakdown
Option : Primary valencies are non-ionisable.

Incorrect choice. This distractor represents a common misunderstanding of the core principles of Coordination Compounds.

Option 1: Secondary valencies are ionisable.

Incorrect choice. This distractor represents a common misunderstanding of the core principles of Coordination Compounds.

Option 2: Secondary valencies are non-directional.

Incorrect choice. This distractor represents a common misunderstanding of the core principles of Coordination Compounds.

Option 3: Primary valencies are ionisable and satisfied by negative ions. (Correct Answer)

Correct choice. Refer to the step-by-step verified solution guidelines above for details.

💡 Study Guide: This question tests core syllabus concepts from Coordination Compounds. For formulas, key summaries, and mock exam reference guides, read the full Coordination Compounds Revision Notes.
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