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Chemical formula for calcium pyrophosphate is ca2, P2O1. The formula for ferric pyrophosphate will be:
(1) Fe3(P2O1)3
(2) F24, P4, O14
(3) Fe4(P2O7)3
(4) Fe3Po4
Ans: Fe4(P2O7)3
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If the velocity of hydrogen molecule is 5x 10 4 cm sec -1 then its de-Broglie wavelength is: (1) 2 Å (2) 4 Å (3) 8 Å (4)100 Å Ans: 4 Å
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