- 1(current)
Q. No.Which one of the following represents all isoelectronic species?
1. \(Na^+ , Cl^-, O^- , NO^+\)
2. \(N_2O, N_2O_4 , NO^+, NO\)
3. \(Na^+ , Mg^{2+} , O^- , F^-\)
4. \(Ca^{2+} , Ar, K^+, Cl^-\)
1. \(Na^+ , Cl^-, O^- , NO^+\)
2. \(N_2O, N_2O_4 , NO^+, NO\)
3. \(Na^+ , Mg^{2+} , O^- , F^-\)
4. \(Ca^{2+} , Ar, K^+, Cl^-\)
Subtopic: Ionization Energy (IE) |
76%
From NCERT
NEET - 2023
Please attempt this question first.
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The first ionization enthalpies of elements X and Y are 419 kJ mol–1 and 590 kJ mol–1, respectively and the second ionization enthalpies of X and Y are 3069 kJ mol–1 and 1145 kJ mol–1, respectively. The correct statement is:
| 1. | X is an alkali metal and Y is an alkaline earth metal. |
| 2. | X is an alkaline earth metal and Y is an alkali metal. |
| 3. | Both X and Y are alkali metals. |
| 4. | Both X and Y are alkaline earth metals. |
Subtopic: Ionization Energy (IE) |
71%
From NCERT
NEET - 2022
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
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To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
The correct order of first ionization enthalpy for the given four element is:
1. C < N < F < O
2. C < N < O < F
3. C < O < N < F
4. C < F < N < O
1. C < N < F < O
2. C < N < O < F
3. C < O < N < F
4. C < F < N < O
Subtopic: Ionization Energy (IE) |
77%
From NCERT
NEET - 2022
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
For the second-period elements, the correct increasing order of first ionisation enthalpy is:
1. Li < Be < B < C < O < N < F < Ne
2. Li < Be < B < C < N < O < F < Ne
3. Li < B < Be < C < O < N < F < Ne
4. Li < B < Be < C < N < O < F < Ne
Subtopic: Ionization Energy (IE) |
74%
From NCERT
NEET - 2019
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh
- 1(current)
Q. No.
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