Which of the following is not possible in glucose?

$A$ molecule of glucose reacts with $x$ molecules of phenylhydrazine to form osazone. The value of $x$ is.........

Which is the chemical test for polysaccharide?

How many double bond equivalents (degree of unsaturation) does a compound with the molecular formula $C_6H_{12}O_6$ possess?

The number of $-OH$ groups in open chain and ring structures of $D$-glucose are respectively:

For 'invert sugar',the correct statement$(s)$ is(are)
(Given: specific rotations of $(+)$-sucrose,$(+)$-maltose,$L-(-)$-glucose and $(+)$-fructose in aqueous solution are $+66^{\circ}, +140^{\circ}, -52^{\circ}$ and $+92^{\circ}$,respectively)
$(A)$ 'invert sugar' is prepared by acid catalyzed hydrolysis of maltose
$(B)$ 'invert sugar' is an equimolar mixture of $D-(+)$-glucose and $D-(-)$-fructose
$(C)$ specific rotation of 'invert sugar' is $-20^{\circ}$
$(D)$ on reaction with $Br_2$ water,'invert sugar' forms saccharic acid as one of the products