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JEE Main levelSingle correct optionDifficulty 2 of 3sb092

Match the substance in Column I with its use in Column II. Column I: (P) ; (Q) ; (R) ; (S) (anhydrous). Column II: (1) setting fractured bones; (2) purgative; (3) drying agent for most gases; (4) opaque meal for X-ray imaging of the gut.

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

Answer: A

BaSO4 is insoluble and opaque to X-rays (barium meal, P-4). Plaster of Paris sets bones (Q-1), Epsom salt is a purgative (R-2) and anhydrous CaCl2 is a common drying agent (S-3).
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