MCQ
Correct for the complex $[Cu(NH_3)_4]^{2+}$ is/are
- AParamagnetic
- B$dsp^2$ hybridisation
- CSquare planar geometry
- ✓All of these
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Assertion $(A)$ : Haloalkanes react with $\mathrm{KCN}$ to form alkyl cyanides as a main product while with $\mathrm{AgCN}$ form isocyanide as the main product.
Reason $(R)$ : $\mathrm{KCN}$ and $\mathrm{AgCN}$ both are highly ionic compounds.
In the light of the above statement, choose the most appropriate answer from the options given below:

$A \,|\, A^+\, (xM)\, ||\, B^+ \,(yM)\, |\, B$
The $emf$ measured is $+ 0.20\, V.$ The cell reaction is