Disorders of Fluid and Electrolyte Balance

Previous year questions on Disorders of Fluid and Electrolyte Balance for NEET PG (National Eligibility cum Entrance Test - Postgraduate), from the Paediatrics section of the exam.
Most questions here come from previous-year papers of Indian postgraduate medical entrance and licensing exams; where a paper and year are recorded the question carries them. The image-based questions are original vignettes written around an openly licensed figure, and were never asked in any exam.
56 live questions in Disorders of Fluid and Electrolyte Balance.
1 of 56 questions carries a verified exam year: 2018.
Paediatrics is worth about 10 of 300 questions on the exam. See every subject’s weightage.
Question set last updated 6 Sept 2026.

Q1.Reduced osmolarity ORS does not contain which of the following ion?
- ASodium
- BPotassium
- CLactate
- DCitrate
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Q2.A child with diarrhea has deep & rapid respiration. Most likely diagnosis is:
- ARespiratory acidosis
- BRespiratory alkalosis
- CMetabolic acidosis
- DMetabolic alkalosis
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Q3.A child has a history of profuse watery diarrhea, not taking orally and not passed urine for 2 days, which of the following to be given?
- AMilk
- BORS
- CIV fluids
- DIV antibiotics
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Q4.1 yr child weighing 6 kg is suffering from Acute Gastroenteritis along with signs of sunken eyes & skin pinch going back to normal very slowly. What will be your management?
- ARL infusion 120 ml in the first hour followed by 360 ml in the next 5 hours
- BRL INFUSION 180 ml in the first hour followed by 420 ml in the next 5 hours
- CRL INFUSION 180 ML IN the first hour followed by 480 ml in the next 5 hours
- DRL INFUSION 240 ml in the first hour followed by 360 ml in the next 5 hours
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Q5.Amount of ORS given in 4 KG children with diarrhoea
- A200 ml
- B300 ml
- C400 ml
- D800 ml
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Q6.6 years old drowsy child is brought to emergency with a history of vomitings and loose motion for 3 days. On examination, he had sunken eyes, hypothermia, skin on pinching taken very long time to reve. Diagnosis is
- ANo dehydration
- BMild dehydration
- CSome dehydration
- DSevere dehydration
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Q7.A breast fed child presents with hypernatremia (Serum sodium > 170m Eq/L). His urine sodium is 70 mEq/L. Which of the following is the most likely cause –
- ADiabetes insipidus
- BAcute tubular necrosis
- CSevere dehydration
- DExcessive intake of sodium
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Q8.Hyperkalemia in children may occur in all except –
- AInsulin deficiency
- BMetabolic acidosis
- CAcute renal failure
- DCushing's syndrome
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Q9.A 10 days old neonate is posted for pyloric stenosis in surgery. The investigation report shows a serum calcium level of 6 mg/dL. What information would you like to know before you supplement calcium to this neonate –
- ABlood glucose
- BSerum protein
- CSerum bilirubin
- DOxygen saturation
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Q10.A 5 years old child presented with continuous fever and features of sepsis with a BP of 90/60 mm Hg, Pulse rate 144/min and respiratory rate of 30/min. What is the initial fluid of choice for management?
- A10 mL/kg of 10% dextrose
- B10 mL/kg of hydroxyethyl starch
- C20 mL/kg of 0.45% normal saline
- D20 mL/kg of 0.9% normal saline
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Answer key

Q1: C. Lactate; Q2: C. Metabolic acidosis; Q3: C. IV fluids; Q4: B. RL INFUSION 180 ml in the first hour followed by 420 ml in the next 5 hours; Q5: B. 300 ml; Q6: D. Severe dehydration; Q7: D. Excessive intake of sodium; Q8: D. Cushing's syndrome; Q9: B. Serum protein; Q10: D. 20 mL/kg of 0.9% normal saline.

Sit a timed test on Disorders of Fluid and Electrolyte Balance

Disorders of Fluid and Electrolyte Balance

Answer key

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