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61. Which of the following is correct electron dot structure of oxygen? (NTSE Maharashtra, Stage-I, 2015-16)
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62. The spectrum of He+ is expected to be similar to that of (NTSE Bihar, Stage-I, 2016-17)
H
Li
Na
He
63. Which of the following oxoacids of phosphorus is used in the preparation of Graham's salt? (NTSE Bihar, Stage-I, 2016-17)
H3P03
H4P207
HP03
H2P20 5
64. I n the reaction Cr2O72-+ 14H + 6e → 2Cr3 + 7H20 The equivalent weight of K2Cr2 O7 in acidic medium will be (NTSE Bihar, Stage-I, 2016-17)
M/3
M/9
M/12
M/6
65. For the reaction 2A + 2B → 2AB, the following data were collected The total order of the reaction is (NTSE Bihar, Stage-I, 2016-17)
1
2
3
4
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