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I(1) of an element X is 899" kJ mole"^(-...

`I_(1)` of an element X is `899" kJ mole"^(-1)` and that of another element Y is `801" kJ mole"^(-1)`. Then X and Y may be

A

`Li, Be`

B

`Be, B`

C

`B, C`

D

`C, N`

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The correct Answer is:
B
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NARAYNA-PERIODIC TABLE -All Questions
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  2. Second ionization potential value is very low for

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  3. I(1) of an element X is 899" kJ mole"^(-1) and that of another element...

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  4. The first ionisation potential in electron volts of nitrogen and oxyge...

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  5. The second ionisation energy of N and O in electron volt are respectiv...

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  6. The first ionisation potential of Na,Mg,Al and Si are in the order

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