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1. The substance with the lowest molecular weight has the highest volatility, i.e. the lowest boiling point. Of those listed is dimethyl ketone 2. It is clear that nitrates with nitrate do not give any reaction. This leaves sylvinite. Sylvinite is a natural calcium chloride with impurities of course. With silver nitrate it reacts with precipitation of white silver chloride This is a known qualitative reaction to chlorine ions 3. I think that the basic properties decrease just from a to d The more groups of radicals attached to the amino group and the larger they are the more they pull the free electron pair from the nitrogen atom the electron density at the nitrogen atom decreases and the atom attracts protons to itself weaker i.e. the basic properties weaken.
1. The substance with the lowest molecular weight has the highest volatility, i.e. the lowest boiling point. Of those listed is dimethyl ketone 2. It is clear that nitrates with nitrate do not give any reaction. This leaves sylvinite. Sylvinite is a natural calcium chloride with impurities of course. With silver nitrate it reacts with precipitation of white silver chloride This is a known qualitative reaction to chlorine ions 3. I think that the basic properties decrease just from a to d The more groups of radicals attached to the amino group and the larger they are the more they pull the free electron pair from the nitrogen atom the electron density at the nitrogen atom decreases and the atom attracts protons to itself weaker i.e. the basic properties weaken.