Metabolic changes associated with excessive vomiting includes the following -: (A) Metabolic acidosis, (B) Hyperchloremia, (C) Hypokalemia, (D) Decreases bicarbonates
Answer is C. Vomiting causes loss of gastric secretions which include HCl & K+ ions, resulting in metabolic alkalosis, hypokalemia and hypochloremia.
However note that the moderate to severe hypokalemia seen with excessive vomiting is not merely explained by loss of K+ ions in vomiting.
"In fact the hypokalemia is primarily due to increased renal K+ excretion. Loss of gastric contents results in volume depletion and metabolic alkalosis, both of which promote Kaliuresis." - Harrison 16/e, p 259.