Which among the following is a non-reducing sugar?

In the following circuit,$PN$-junction diodes $D_1, D_2,$ and $D_3$ are ideal. For the following potentials of $A$ and $B$:
$(i) -10 \ V, -5 \ V$
$(ii) -5 \ V, -10 \ V$
$(iii) -4 \ V, -12 \ V$
The correct increasing order of resistance between $A$ and $B$ will be:

Hydrated $AlCl_3$ is used as:

The term independent of $y$ in the expansion of $(y^{-1/6} - y^{1/3})^9$ is

Two spherical soap bubbles of radii $r_1$ and $r_2$ in vacuum combine under isothermal conditions. The resulting bubble has a radius equal to:

Which one of the following statements in regard to the excretion by the human kidneys is correct?