The first ionization enthalpy values (in kJ mol–1) of group 13 elements are :
B | Al | Ga | In | Tl |
801 | 577 | 579 | 558 | 589 |
The explanation for the deviation from the general trend can be -
1. Ga has lower ionization enthalpy than Al.
2. Ga has higher ionization enthalpy than Al.
3. Al has higher ionization enthalpy than Ga.
4. Ga has a lesser valence electron than Al.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyBoron has lesser ionization enthalpy than Beryllium, because:
1. | It is easier to remove electrons from p - a subshell than a filled s - subshell. |
2. | The s-electron can be removed easier than the p-electron. |
3. | Ionization enthalpy decreases with an increase in atomic number. |
4. | Ionization enthalpy increases along the period. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe graph between ionization energy and atomic number for
the first group elements is shown below:
The element represented by Y in the graph above is -
1. Cs
2. Rb
3. Ca
4. K
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA configuration with the lowest ionization enthalpy among the following is:
1. \(1 s^2 2 s^2 2 p^5\)
2. \(1 s^2 2 s^2 2 p^3\)
3. \(1 s^2 2 s^2 2 p^6 3 s^1\)
4. \(1 s^2 2 s^2 2 p^6\)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAbnormally high ionization enthalpy of B as depicted in the graph below can be due to :
1. Completely filled 2p subshell.
2. Completely filled 2s subshell.
3. Completely filled 3d subshell.
4. Completely filled 4f subshell.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biologyand for Mg are 178 Kcal mol–1 and 348 Kcal , respectively. The energy required for the reaction, will be:
1. +170 Kcal
2. +526 Kcal
3. –170 Kcal
4. –526 Kcal
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe incorrect statement about ionization enthalpy is:
1. | Ionization enthalpy increases for each successive electron. |
2. | Noble gases have the highest ionization enthalpy. |
3. | A big jump in ionization enthalpy indicates a stable configuration. |
4. | Ionization enthalpy of oxygen is higher than that of nitrogen. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyFor 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 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAmongst the following electronic configurations, the highest ionization energy
is represented by:
1. [Ne]3s23p3
2. [Ne]3s23p2
3. [Ar]3d104s24p3
4. [Ne]3s23p1
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe values of the first ionization enthalpies for two isotopes would be:
1. | Same. |
2. | Different. |
3. | Same values but positive for the first and negative for the second. |
4. | Same values but negative for the first and positive for the second. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology