Match the reactions of carbon monoxide/dioxide in Column I with products in Column II. Column I: (P) CO + Cl2 (sunlight); (Q) CO + NaOH (heat, pressure); (R) CO + Ni (about 330-350 K); (S) CO2 + excess aqueous NaOH. Column II: (1) Ni(CO)4; (2) HCOONa; (3) COCl2; (4) Na2CO3.

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JEE Advanced levelSingle correct optionDifficulty 3 of 3pb198

Match the reactions of carbon monoxide/dioxide in Column I with products in Column II. Column I: (P) $CO + Cl X_{2}$ (sunlight); (Q) $CO + NaOH$ (heat, pressure); (R) $CO + Ni$ (about 330-350 K); (S) $CO X_{2}$ + excess aqueous $NaOH$ . Column II: (1) $Ni (CO) X_{4}$ ; (2) $HCOONa$ ; (3) $COCl X_{2}$ ; (4) $Na X_{2} CO X_{3}$ .

AP-3, Q-2, R-1, S-4
BP-3, Q-4, R-1, S-2
CP-2, Q-3, R-1, S-4
DP-1, Q-2, R-3, S-4

Answer: A

CO with chlorine gives phosgene (P-3). CO and NaOH under pressure give sodium formate (Q-2). CO and nickel give nickel tetracarbonyl, the basis of the Mond process (R-1). Excess alkali converts

CO X_{2}

to sodium carbonate (S-4).

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Match the reactions of carbon monoxide/dioxide in Column I with products in Column II. Column I: (P) CO+ClX2​ (sunlight); (Q) CO+NaOH (heat, pressure); (R) CO+Ni (about 330-350 K); (S) COX2​ + excess aqueous NaOH. Column II: (1) Ni(CO)X4​; (2) HCOONa; (3) COClX2​; (4) NaX2​COX3​.

Answer: A

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