Which from following tests contirms presence of aldehydic group in glucose?

Which metal in following compounds is not present in fractional oxidation state?

Which among the following is NOT dicarboxylic acid?

Identify the substrate ' X ' in the following reaction.

$$ \mathrm{X}+\underset{\text { (air) }}{\mathrm{O}_2} \xrightarrow[\text { ii) dil HCl } \Delta]{\text { i) Co-naphenate } 423 \mathrm{~K}} \text { Phenol }+ \text { Acetone } $$