Question
Which of the following method can be employed to test
the Hardness of Water?Solution
Hardness of water is due to calcium and magnesium ions. Sodium salts dissolve in water and hence lather is formed. When soap is added to hard water, calcium and magnesium ions replaces sodium (or potassium) ions in the soap and gets precipitated hence lather formation is hindered. Thus, this method can be employed to test the hardness of water.
Yellowish colour of cow milk is due to
Replication in experimental design
Constraints in the adoption of INMÂ
Late Blight of Potato is caused by
Which one of the following is an example of symbiotic nitrogen fixing bacteria?
The degree of distinctness and durability of individual peds determines by:
The main reason behind formation of a covalent bond is-
What is the term for a sudden and heritable change in the DNA sequence of an organism?
Best method to handle nematode Infestation into new area is?
Which of the following statements is true?
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