Verbal Reasoning - Mental Ability Questions

In the following question, from the given alternative words, select the word which cannot be formed using the letters of the given word.
Passenger

Which set of letters when sequentially placed at the gaps in the given letter series shall complete it?

CD_E_DD_CD_E

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.

Nitrogen fixation, Ammonification, Nitrification, ?

The weights of 4 boxes are 30, 70, 60 and 90 kilograms. Which of the following cannot be the total weight, in kilograms, of any combination of these boxes and in a combination a box can be used only once?

In the question, a word is represented by only one set of numbers as given in any one of the alternatives. The sets of numbers given in the alternatives are represented by two classes of alphabets as in two matrices given below. The columns and rows of Matrix I are numbered from 0 to 4 and that of Matrix II are numbered from 5 to 9. A letter from these matrices can be represented first by its row and next by its coloumn,e.g., A can be represented by 02,14,40, etc., and P can be represented by 56,75,87 etc. You have to identify the set for the word 'TAKE'.

In a certain code language, “MATE” is written as “41” and “LION” is written as “52”. How is “TARM” written in that code language?

Rajat is the brother of Sanjay and Manish is the father of Rajat. Jay is the brother of Shreya and Shreya is the daughter of Sanjay. Who is the uncle of Jay?

In the following question, select the related letters from the given alternatives.

NPBG : OQCH : : AJOT : ?