InterviewSolution
Saved Bookmarks
| 1. |
(a) Fresh milk has a pH of 6. When it changes into curd (yogurt), will its pH value increase or decrease? Why?(b) Name the gas evolved when dilute HCl reacts with sodium hydrogencarbonate. How is it recognised?(c) On adding dilute hydrochloric acid to copper oxide powder, the solution formed is blue-green. Predict the new compound formed which imparts a blue-green colour to the solution. |
|
Answer» (a) Fresh milk has a pH of 6. When it changes into curd (yogurt), will its pH value increase or decrease? Why? (b) Name the gas evolved when dilute HCl reacts with sodium hydrogencarbonate. How is it recognised? (c) On adding dilute hydrochloric acid to copper oxide powder, the solution formed is blue-green. Predict the new compound formed which imparts a blue-green colour to the solution. |
|