Question

take a test tube and add 2 ml of urine to this add a pinch of soybean or gain flour and i 1 drop of phenolphthalein indicator keep it for 5 min warm if necessary write its observation and conclusion


pls answer it correctly pls pls

Answer 1

Answer:

Phenolphthalein is an organic compound used as a laboratory reagent and pH indicator. Phenolphthalein exerts laxative effects by stimulating the intestinal mucosa and constricting smooth muscles. However, phenolphthalein is no longer used as a laxative due to the suspected carcinogenicity of this compound.

Answer 2

If a test tube containing 2 ml of urine is added with A Pinch of Gram flour and phenolphthalein indicator the result observed are are:

● The colour of urine changes to pink or red colour indicating high PH value that is alkaline nature of urine.

● Alkaline nature of urine is observed under the conditions like urinary tract infections and kidney stones.