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.
1) Toornament
2) Asylum
3) Spordic
4) Poching
- In each of the questions below, a sentence is given with four words highlighted in bold in the sentence. Among these bold words, one may be wrongly spelt. ...
Nothing explains India’s (1)/ job creation challenge (2)/ better than a comparison (3)/ among RIL and Shahi Exports (4)/ No error (5).
Choose the word with correct spelling.
- In each sentence below, four words have been printed in bold which are numbered (1), (2), (3), and (4). One of these words may be misspelt or inappropriate...
1) conjunct
2) constain
3) efficent
4) eloqent
As I got closer , I realize that the metal cage was in fact a small trap .
...Select the wrongly spelt word.
Choose the incorrectly spelt word.
- Choose the correctly spelled word from the options below:
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