The number of chiral carbons in $\beta-D-(+)$-glucose is

The reaction of concentrated sulphuric acid with carbohydrates $(C_{12}H_{22}O_{11})$ is an example of

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

Which of the following carbohydrates produces double the quantity of glucose on hydrolysis per mole as compared with sucrose?

Find the number of optical isomers for the compound $CHO-CH(OH)-CH(OH)-CH(OH)-CH(OH)-CH_2OH$.

An example of a non-reducing sugar is: