I believe strong acidic conditions are no used because the amine will be completely protonated. The strong acid condition decreases the rate of reaction of the amine. The fastest imines formation occurs with a pH of 4-5. When there is no free electron pair, it is no longer a nucleophile and so nucleophilic addition cannot occur.
Your answer is B, C , and D.
Answer:
A. Tap water is a homogenous mixture and distilled water is a pure substance.
Explanation:
Tap water can be classified as a homogeneous mixture because it contains equal amounts of dissolved minerals and other chemicals that are even throughout the mixture.
In the other hand, distilled water is classified as a pure substance because it contains definite amount of atoms of elements and unique chemical properties that forms water.
The answer is; False
Soil color does not only reflect the amount of organic matter present in soil.
Soil color is used to derive information about processes occurring in soil. Soil color is produced or determined by the minerals composition and the organic matter content of the soil. Soil color can reflects the amount of organic matter present in soil, it can indicate the composition of soil, it can provide clues about the state of soil and it can reflect its age. Also, soil color can indicate the temperature and moisture properties of the climate of a particular region.
