Verbal Reasoning - Mental Ability Questions

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, ?

From the given alternative words, select the word which cannot be formed using the letters of the given word:

CARPENTER

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

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?

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

CD_E_DD_CD_E

Vijey walks 10 meters westward, then turns left and walks 10 meters. He then again turns left and walks 10 meters. He takes a 45 degree turn rightwards and walks straight. In which direction is he walking now?

Find the odd word/letters/number pair from the given alternatives.

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?