A) \[{{C}_{6}}{{H}_{5}}COOH\]
B) \[m-C{{H}_{3}}O{{C}_{6}}{{H}_{4}}COOH\]
C) \[p-C{{H}_{3}}O{{C}_{6}}{{H}_{4}}COOH\]
D) \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}N{{H}_{2}}\]
Correct Answer: A
Solution :
The compound used for gravimetric estimation of Cu (II) is \[NiCl_{4}^{2-}\]. Gravimetric analysis is concerned with the transformation of element or radical to be determined into a pure stable compound which can be readily converted into a form suitable for weighing.
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