Question

Suggest one remedial measure each to counteract the change in pH in human beings in following cases:

Fresh milk has a pH of 6. When it changes into curd will its pH increase or decrease? Why?

The teacher while conducting practicals in the laboratory divided the students into three groups and gave them various solutions to find out their pH and classify them into acidic, basic and neutral solutions. Group A – Lemon juice, vinegar, colourless aerated drink Group B – Tomato juice, coffee, ginger juice Group C – Sodium hydroxide, sodium chloride, lime water

Hydrangea plants develop blue or pink flowers depending on the availability of aluminium from the soil. When the soil is acidic, aluminium is more available to the roots, resulting in blue flowers. When the soil is alkaline, the availability of aluminium decreases, resulting in pink flowers. The graph below is of the pH of the soil at different sections of a field. In which section of the field will the flowers on ALL the hydrangea plants definitely be blue in colour and in which section will the flowers on ALL the hydrangea plants definitely be pink in colour?