Identify the glycosidic linkage present in lactose.

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

The Fischer projection formula of $L-(-)-glucose$ is:

$CHO-(CHOH)_4-CH_2OH \xrightarrow{HIO_4} \text{Product}$. Identify the product.

What is the quantity of water required to obtain one mole of glucose from one mole of sucrose by acid hydrolysis (in $g$)?

What is the linkage connecting monosaccharides in a polysaccharide called?