Which of the following is a reducing sugar?

What is the number of stereoisomers for $D$-glucose ($6$ carbon sugar)?

The letter '$D$' in $D$-glucose signifies

Which of the following statements is incorrect for glucose?

The aqueous solution of a carbohydrate gives a dark blue colour with iodine. It is

$L$-isomer of a compound $A$ $(C_{4}H_{8}O_{4})$ gives a positive test with $[Ag(NH_{3})_{2}]^{+}$. Treatment of $A$ with acetic anhydride yields a triacetate derivative. Compound $A$ produces an optically active compound $B$ and an optically inactive compound $C$ on treatment with bromine water and $HNO_{3}$ respectively. Compound $A$ is ....