A carbon, hydrogen, and oxygen atoms containing an organic compound (A), in reaction with an excess of CH3MgI, gives a gas (X) whose volume under STP conditions is found to be 89.6 liters. Find the number of hydroxyl groups in the compound (A):
Correct answer: D. 4
- A. 3
- B. 5
- C. 2
- D. 4
Explanation
The problem involves an organic compound (A) reacting with excess CH3MgI, which is a Grignard reagent. The reaction of Grignard reagents with hydroxyl groups produces hydrogen gas (H2). Given that the gas volume is 89.6 liters at STP, we divide this by the molar volume of a gas at STP, 22.4 liters/mol, to find the number of moles of gas produced, which is 4 moles. This indicates that 4 hydroxyl groups are present in compound (A). Other options are incorrect because they do not match the stoichiometry of the reaction and the provided volume data.
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