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NDA 2 2025 GAT, question 109

Topic: Chemistry

Q109

Which one of the following is known as ‘water gas’ ?

  1. (a) H2O+CO2H_{2}O+CO_{2}
  2. (b) NH3NH_{3}
  3. (c) H2+N2H_{2}+N_{2}
  4. (d) CO+H2CO+H_{2}Correct answer

Solution.

Answer: (d) CO+H2CO+H_{2}

  1. Water gas is mainly a mixture of carbon monoxide and hydrogen, obtained by passing steam over hot carbon: C+H₂O→CO+H₂.
  2. It is not simply gaseous water.