Qualitative Analysis - Result Question 46

####49.

Identify the metal M and hence MCl4. Explain the difference in colours of MCl4 and A.

(2005,4M)

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Answer:

Correct Answer: 49. (6 or 7)

Solution:

  1. MCl4 Colourless Zn Purple coloured compound (A)

Colourless

M Transition metal  Air  Moist B (white fumes) 

M=Ti,A=[Ti(H2O)6]3+;B=TiO2

Ti (IV) contains no d-electron, while d - d transition of single electron of Ti (III) will cause colour change.



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