Xgm of a metal (eq wt 12) was completly dissolved in 100cc of n/2 hcl. the volume was then made upto 500cc of this dilute acid. 25ml of this acid required 1705cc of n/10 naoh for complete neutralization. find the value of x.

15. which of the following is not human-caused groundwater pollution? a. water in an aquifer dissolves elements such as arsenic and mercury from surrounding rock. b. water in an aquifer is contaminated by leachate that seeps into the ground from a landfill. c. water in an aquifer becomes polluted with chemicals used in hydraulic fracturing, or fracking. d. water in an aquifer absorbs harmful bacteria from the drainage field of a septic tank.