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Question

Which of the following conversions are correct?

This question was previously asked in
RRB NTPC 2024 Undergraduate CBT 1 Question Paper (29-Aug-2025) (Shift 1)
The correct answer is

1 L = 1 dm³ and 1 mL = 1 cm³

To verify the correct unit conversions, let's examine the definitions of each unit:

  • Liter (L) to Cubic Decimeter (dm³): One liter (L) is equivalent to one cubic decimeter (dm³). Thus, 1 L = 1 dm³. This is a standard metric conversion.
  • Milliliter (mL) to Cubic Centimeter (cm³): One milliliter (mL) corresponds to one cubic centimeter (cm³). Therefore, 1 mL = 1 cm³.

Based on these conversions, let's evaluate the given options:

  • Option 1: 1 L = 1000 dm³ and 1 mL = 1000 cm³. This is incorrect as 1 L = 1 dm³ and 1 mL = 1 cm³.
  • Option 2: 1 L = 1 dm³ and 1 mL = 1 cm³. This matches the accurate definitions.
  • Option 3: 1000 L = 1 dm³ and 1000 mL = 1 cm³. This is not possible as it contradicts the standard conversions.
  • Option 4: 1000 L = 1 dm³ and 1 mL = 1000 cm³. Again, this is incorrect based on standard unit conversions.

Thus, the correct answer is: 1 L = 1 dm³ and 1 mL = 1 cm³.

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