Question
What causes the permanent hardness of
water?Solution
Permanent hardness of water is caused by the presence of soluble salts of chlorides and sulfates of calcium and magnesium. Unlike temporary hardness, which can be removed by boiling, permanent hardness remains unless treated with a chemical process.
Four number triads have been given, out of which three are alike in some manner and one is different. Select the number triad that is different.
In the following question, select the odd word from the given alternatives.
Three of the four are alike in a certain way based on a particular pattern and hence they form a group. Which one of the following does not belongs to t...
Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the number-pair that is different.
Find the ODD one out from the given options.
Four letter-clusters have been given out of which four are alike in some manner and one is different. Select the one that is different.
Four words have been given, out of which three are alike in some manner and one is different. Select the word that is different.
Find the odd one out of the choices given therein.
Find the odd number pair from the given alternatives.
Three of the following four letter-clusters are alike in a certain way and one is different. Choose the odd one.
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