Question

Which of the following test results would help to prove that a particular sample of water was pure?
A. The pH was 7
B. Anhydrous copper (ll) sulphate turned blue
C. On evaporation, it turned no residue
D. It boiled at exactly 100 degree celsius at a pressure of one atmosphere

Answer 1

ह्स्ज्सोवोक3ओ2क2ओ2ई2जेजेजेज3ज3इ3इ93929292292

Answer 2

correct answer is ====== Option B