MCQ
The tendency towards complex formation is maximum in:
- A$S-$block elements.
- B$P-$block elements.
- ✓$D-$block elements.
- DNone of the above.
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$A +$ alkali $\rightarrow B$ (Major Product)
If $B$ is an oxoacid of phosphorus with no $P - H$ bond, then $A$ is ..... .
${C_6}{H_5}N{O_2}\xrightarrow{{Sn / HCl}}X\xrightarrow{{{C_6}{H_5}COCl}}Y + HCl$
What is $Y$ ?
${K_2}Cr_2{O_7}/{H^ + } + y \to \mathop {C{r^{ + 3}} + Others}\limits_{(green)\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} $
Ethanol $\xrightarrow{{PB{r_3}}}X\,\xrightarrow{{alc.\,KOH}}\,Y$$\,\xrightarrow[{(ii)\,{H_2}O\,,\,heat}]{{(i)\,{H_2}S{O_4},\,room\,\,temperature}}Z$
the product $Z$ is