Which one of the substances given ahead is an element,a mixture or a chemical compound. Give one reason in each case: chlorine,Milk,Honey,Flowers of sulphur, Gun power , Brine, Sulphur, Apple juice, Carbon dioxide, Air, syrup.

Consider a one-dimensional motion of a particle with total energy E. There are four regions A, B, C and D in which the realtion beetween potential energy V, kinetic energy (K) and total energy E is as given ahead. Region A: V>E, Region B : V E, Region D : V > K State with reason in each case whetehr a article can be found in the given region or not.