MCQ
The basic structural unit of silicates is
- A$SiO_3^{2-}$
- B$SiO_4^{2-}$
- C$SiO^-$
- ✓$SiO_4^{-4}$

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Reason : Zinc is a powerful reducing agent than copper.
${{C}_{6}}{{H}_{5}}OH\xrightarrow{NaOH}(A)$ $\mathop {\xrightarrow{{\;C{O_2}\;\;\;\;\;\;\;\;\;\;\;\;}}}\limits_{140\,^oC,\;(4 - 7\,)} (B)$ $\xrightarrow{{HCl}}(C),$
Assertion $A:$ The spin only magnetic moment value for $\left[ Fe ( CN )_6\right]^{3-}$ is $1.74 BM$, whereas for $\left[ Fe \left( H _2 O \right)_6\right]^{3+}$ is $5.92\,BM$.
Reason $R :$ In both complexes, $Fe$ is present in +3 oxidation state.
In the light of the above statements, choose the correct answer from the options given below:
Product in above reaction is