text: # The decomposition of a certain mass of CaCO3 gave 11.2 dm3 of CO2 gas at STP. The mass of KOH required to completely neutralise the gas is (A) 56 g (B) 28 g (C) 42 g (D) 20 g
  
  R Shyam Sundar
  15 Points
  4 years ago
  For complete neutralisation,
  2KOH+CO2 gives K2CO3 + H2O
  For 11.2dm^3 i.e.,11.2L(half mole) we need 1mole KOH.
  So weight of KOH is 56g
  
  Vikas TU
  14149 Points
  4 years ago
  Dear student
  Weight of 11.2 dm^3 of CO2 gas at STP = 44/2 = 22 gram
  KOH + CO2 -> KHCO3
  KOH required = 56/44  * 22 = 28 gram
  B is correct ans.
  Hope this helps
  Good Luck
explanation: The document contains a chemistry problem related to the decomposition of calcium carbonate (CaCO3) and the subsequent neutralization of the produced carbon dioxide (CO2) gas with potassium hydroxide (KOH). The problem is presented as a multiple-choice question, and it includes two different answers provided by different users, R Shyam Sundar and Vikas TU.
distilabel_metadata.content: Evaluate the user given text extract and determine if it contains a math question and optionally and answer to this question.
  
  Output rules:
  
  1. Briefly describe the document and mention if it contains a question or a question and answer.
  2. Finalize the output with: Label: no-question,question,question-and-answer,multiple-question,multiple-question-and-answer
distilabel_metadata.role: system
distilabel_metadata.content: # The decomposition of a certain mass of CaCO3 gave 11.2 dm3 of CO2 gas at STP. The mass of KOH required to completely neutralise the gas is (A) 56 g (B) 28 g (C) 42 g (D) 20 g
  
  R Shyam Sundar
  15 Points
  4 years ago
  For complete neutralisation,
  2KOH+CO2 gives K2CO3 + H2O
  For 11.2dm^3 i.e.,11.2L(half mole) we need 1mole KOH.
  So weight of KOH is 56g
  
  Vikas TU
  14149 Points
  4 years ago
  Dear student
  Weight of 11.2 dm^3 of CO2 gas at STP = 44/2 = 22 gram
  KOH + CO2 -> KHCO3
  KOH required = 56/44  * 22 = 28 gram
  B is correct ans.
  Hope this helps
  Good Luck
distilabel_metadata.role: user
distilabel_metadata.raw_output_q_a_detector_0: The document contains a chemistry problem related to the decomposition of calcium carbonate (CaCO3) and the subsequent neutralization of the produced carbon dioxide (CO2) gas with potassium hydroxide (KOH). The problem is presented as a multiple-choice question, and it includes two different answers provided by different users, R Shyam Sundar and Vikas TU.
  
  Label: question-and-answer