How many meaningful English words can be formed with $ESRO$ using each letter only once in each word?

In the following series,count each $N$ which is immediately followed by $X$ but $X$ is not immediately followed by $T.$ How many such $N's$ are there?
$N, X, N, T, Q, M, N, X, T, M, X, N, X, C, N, Q, M, N, N, X, Q, N, X, T, X, N, A, M, X, N, X, M$

Arrange the given names in the order in which they would occur in a telephone directory and choose the one that comes in the middle.

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

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

How many meaningful English words can be formed by using any two letters of the word $GOT$?