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With reference to 1^(st) IP which are co...

With reference to `1^(st) IP` which are correct.
(a) `Li lt C` (b) `O lt N` (c ) `Be lt N lt Ne`

A

`a, b` only

B

`b,c` only

C

`a, c` only

D

`a,b & c`

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The correct Answer is:
To determine the correctness of the given statements regarding the first ionization potential (IP), we will analyze each option step by step. ### Step 1: Analyze Option (a) `Li < C` - **Lithium (Li)** is in Group 1 (alkali metals) and has a relatively low ionization energy due to its larger atomic size and lower effective nuclear charge. - **Carbon (C)** is in Group 14 and has a higher ionization energy because it has a smaller atomic size and a higher effective nuclear charge compared to lithium. - Therefore, the order `Li < C` is correct. ### Step 2: Analyze Option (b) `O < N` - **Oxygen (O)** is in Group 16 and **Nitrogen (N)** is in Group 15. - Normally, we would expect ionization energy to increase across a period. However, nitrogen has a half-filled p-orbital configuration (2p^3), which is more stable and requires more energy to remove an electron compared to oxygen (which has a configuration of 2p^4). - Thus, the order `O < N` is incorrect; in fact, it should be `N < O`. ### Step 3: Analyze Option (c) `Be < N < Ne` - **Beryllium (Be)** is in Group 2, **Nitrogen (N)** is in Group 15, and **Neon (Ne)** is in Group 18. - Beryllium has a higher ionization energy than lithium, but lower than nitrogen. Nitrogen has a high ionization energy due to its half-filled configuration, and Neon has the highest ionization energy because it has a fully filled outer shell. - The order `Be < N < Ne` is correct. ### Conclusion - From the analysis: - Option (a) `Li < C` is correct. - Option (b) `O < N` is incorrect. - Option (c) `Be < N < Ne` is correct. Thus, the correct answers are (a) and (c). ### Final Answer: The correct orders are (a) `Li < C` and (c) `Be < N < Ne`. ---
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RESONANCE ENGLISH-PERIODIC TABLE & PERIODICITY-Advanced Level Problems
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  2. For which of the following species 2^(nd) IE lt 1^(st) IE

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  3. With reference to 1^(st) IP which are correct. (a) Li lt C (b) O lt ...

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  4. Values of 1^(st) four ionisation energies (kJ//mol) of an element are ...

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  5. Which one of the following statement is correct?

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  7. The correct order of electron gain enthalpy (most endothermic first an...

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  13. Which set does not show correct matching ?

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  14. In which element shielding effect is not possible ?

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  19. Which is true statement(s)?

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