Diffusion of water or other solvent through a

In each of the following questions, a group of four words / letters /numbers are given. Choose which is odd?

Find the ODD one out from the given options.

Three of the following four words are alike in a certain manner and one is different. Select the odd word.

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. 

Four letter-clusters have been given, out of which three are alike in some manner and one is different. Select the letter-cluster that is different.

Four of the following five are alike in a certain way based on a group, which among the following does not belong to that group?

Number of letters skipped in between adjacent letters goes on increasing successively by three in the series. Identify the set following the above rule.

Find the odd word from the given alternatives.

Pick out the different one:

In the following question, select the odd number from the given alternatives.