An ester (a) with molecular formula, c 9 h 10 o 2 was treated with excess, of ch 3 mgbr and the complex, so formed, was treated with h 2 so 4 to give an olefin (b). Ozonolysis of (b) gave a ketone with molecular formula c 8 h 8 o which shows +ve iodoform test. The structure of (a) is
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answer is :- C2H5COOC2H5 ✔️✔️
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BF3 molecule is nonpolar molecule because its dipole moment is zero. It has polar bonds but vector sum of their dipole moment is zero. Its structure is plane triangular and angle is 120 o. ... Hence it is polar molecule.
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