A food sample was converted into a paste form and then transferred into a test tube. Few drops of copper sulphate and caustic soda were added. The appearance of violet colour shows the presence of which one of the following in the food sample? ​

italy's population growth rate is almost at zero, the national statistics agency, istat, said on monday, mainly due to a dwindling birth rate.

sand 60

clay 10

silt 30

sandy loam should be dominated by the sand. as the amount of sand increased, the amount of slit needed to anchor the plants' roots to the sand will also be increased. even though the amount is very little, 10% part of clay is still necessary for proper oxidation.

b is the best answer for this question.

well

explanation: