Which of the following is a non-reducing sugar?

The materials having negative magnetic susceptibility are

Dispersive power depends on the following:

Two identical bodies have temperatures $277^{\circ} C$ and $67^{\circ} C$. If the surroundings temperature is $27^{\circ} C$, the ratio of loss of heats of the two bodies during the same interval of time is (approximately) (in $19 : 1$)

Extraction of zinc from zinc blende is achieved by

Pheromone is