Acids, bases and salt Worksheet-10
Match the following:
Acids, bases and salt Worksheet-11
True/False:
Phenophthalein turns pink when an acid is added to it.
Saliva(after meals) gives red colour with Methyl orange.
Formic acid is a strong acid.
Optimum pH for activity of pepsin is 2-2.5.
The tooth enamel is made of Calcium Phosphate which gets damaged when pH of the mouth is less than 5·5.
When a wasp strings, rubbing the affected skin with washing soda gives relief.
Common salt is obtained from the sea water by its electrolysis.
The colour of phenolphthalein in rain water is red.
