Monohar Pandey Solutions for Exercise 13: Exercise 13

Consider the following statements
1. Limestone, chalk and marble are different forms of calcium carbonate.
2. When pH of rain water is less than 5.6, it is called acid rain.
3. Human body works with in the pH range of 7.0 to 7.8.
Which of the statements given above are correct?

Farmers are requested to mix lime with soil while farming their fields. This is because

The indicator used in the titration of a strong acid and a strong basis

Consider the following statements
1. Hardness of water depends upon its soap consuming power.
2. Temporary hardness is due to bicarbonates of magnesium and calcium.
3. Permanent hardness of water is due to sulphate and/or chloride of calcium and magnesium.
4. Permanent hardness can be removed by boiling.
Which of the statements given above are correct?

Vinegar is the trade name of

Select the incorrect statement regarding potash alum

Which chemical was an important symbol in our struggle for freedom?

The pH of fresh milk is 6. When it turns sour, the pH