Logical Sequence of Words Questions

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

COMMENTATOR

Arrange the given words in the sequence in which they occur in the dictionary.
1. Exacts
2. Exotic
3. Exactly
4. Exacerbate
5. Exhaust

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

yes, rain, alive, subtle, ?

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

? , James Garfield, William McKinley, John F. Kennedy

In the word ACCUMUATES, if the 1st letter is interchanged with 2nd, 3rd with 4th, 5th with 6th, 7th with 8th and 9th with the 10th, then the 6th letter from the left will be

From the given alternatives, select the word which CANNOT be formed using the letters of the given word.

Responsibility

Arrange the given words in the sequence in which they occur in the dictionary.
i.Accuse
ii. Accustom
iii. Accumulation
iv. Accompany

From the given alternatives, select the word which CANNOT be formed using the letters of the given word.

Telepathy