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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.
Statements:
Only Song are Lyrics.
Some Song are Music.
All Music are Composer.
Conclusion:
I. All Song are Composer i...
Select the number-cluster that is related to third letter-cluster in the same way first letter cluster and fifth-letter cluster is related to second nu...
Select the option in which the numbers are related in the same way as the numbers in the following set:
(13, 20, 14)
How many pairs of letters are there in the word “FUNCTIONAL” which has as many letters between them in the word as in the English alphabetical serie...
How many persons write the book after R?
Select the related number from the given alternatives:
12 : ? :: 11 : 1332
Select the related number from the given alternatives:
6 : ? :: 5 : 126
Select the option that is related to the fifth term in the same way as the second term is related to the first term and the fourth term is related to th...
Select the set of letters that when sequentially placed in the blanks of the given letter series will complete the series.
_ p m _ o _ m g o p _ _ o _ _ g
Which answer figure will complete the pattern in the q...
