Find which one word cannot be made from the letters of the given word: $PHARMACEUTICAL$.

If it is possible to make only one meaningful English word with the third,the seventh,the eighth and the tenth letters of the word $PREDICAMENT$,which of the following will be the third letter of that word? If no such word can be made,give $X$ as the answer and if more than one such word can be made,give $Y$ as the answer.

How many meaningful English words can be made with all the letters $ERTU$ using each letter only once in each word?

How many such pairs of letters are there in the word $STRIVE$ each of which has as many letters between them in the word as in the English alphabet?

If in the English Alphabet each consonant is substituted by the immediate preceding letter and each vowel is substituted by the immediate following letter,then the word $CAPITALISE$ will be written as

If it is possible to make a meaningful word with the first,the third,the seventh and the ninth letters of the word $SEPARATION$,which of the following will be the third letter of that word? If no such word can be made,give $X$ as the answer and if more than one such word can be made,give $M$ as the answer.