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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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Electronic configuration 1s 2 2s 2 2p 6 3s 2 3p 6 3d 5 4s 1 represents: (1) Ground state (2) Excited state (3) Anionic state (4) All of these Ans: Ground
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Electronic configuration of Sc 21 is: (1) 1s 2 , 2s 2 , 2p 6 , 3s 2 , 3p 6 , 4s 2 , 3d 1 (2) 1s 2 , 2s 2 , 2p 6 , 3s 2 , 3p 6 , 4s 1 , 3d 2 (3)1
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