An explanation or answer based on the facts or evidence you have.
Answer:A
Explanation:
In the Biuret test, the copper ions bind covalently to the amino groups as shown in the image to form a violet complex. This violet complex is responsible for the colour change as shown
The water is more dense than the needle so it can withstand the weight. It is the contraction of the water falling faster than the others forming a drop pattern or the water getting smaller so the top looked smaller.
- Water enter from creeks, bringing whatever material it has dissolved in its way
- The materials is being build up throughout time in the lake or sea, causing its salinity to increase
- when this saline solution is evaporated, the ions in the water precipitate, forming an evaporite
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