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IIT JEE 2007 Practice : CHEMISTRY - Subjective Problems

This section contains 4 numerical problems. The answer to each of the questions would lie between 0 and 9999. You have to simply write the correct numerical value in the input box provided. You will be awarded 6 marks for correct numerical value and 0 for an incorrect value.
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A solid AxBy crystallizes in a face centred cubic (FCC) lattice, atoms A occupying the corners of the cubic unit cells and atoms B occupying the centres of each face of the cubic unit cells. Then the value of x + y is

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