What is the pH of acidic soil?

Which element is 7th to the right of the element, which is 13th to the left of '4'?

If we remove all the letters from this series, then which of the following element will be 7th from left end? 

How many such consonants are there in the above arrangement each of which is immediately preceded by a number and immediately followed by a symbol ?

Select the correct combination of letters when sequentially placed in the blanks of the given letter will complete the series.

Select the combination of letters that when sequentially placed in the blanks of the given letter series will complete the series.

Select the combination of letters that when placed sequentially in the blanks of the given series will complete the series.

In the given series, how many numbers are immediately preceded by a symbol?

% 9 # V # U 9 H Z + X @ O C 7 J % L $ 6 @ 4 % 6 F 5 & 8 D A $

Arrange the words in the alphabetical order and pick the one that come at second last.

Select the combination of letters that when sequentially placed in the blanks of the given letter series will complete the series.