Identify each of the following glucose derivative.
a. `A+5HIO_(4)rarr 4HCOOH+2HCHO`
b. `B+3HIO_(4)rarr 2HCOOH+2OHC--COOH`

Explanation

To identify the glucose derivatives A and B based on the provided reactions, we can follow these steps:

### Step 1: Analyze Reaction A
The reaction is given as:
\[ A + 5HIO_4 \rightarrow 4HCOOH + 2HCHO \]

1. **Identify Products**: The products are 4 moles of formic acid (HCOOH) and 2 moles of formaldehyde (HCHO).
2. **Understand the Reaction**: Periodic acid (HIO4) cleaves the glucose derivative, leading to the formation of these products. Each formic acid corresponds to a carbon that was oxidized, and formaldehyde indicates that two carbons were oxidized to a lower oxidation state.
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