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Q. No.Oxygen has lower ionisation enthalpy than nitrogen due to -
1. Half filled p subshell of oxygen atom.
2. Half filled p subshell of nitrogen atom.
3. Complete filled p subshell of oxygen atom.
4. Complete filled p subshell of nitrogen atom.
Subtopic: Ionization Energy (IE) |
87%
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Factor among the following that doesnot affect the ionization enthalpy of an element is -
1. Effective nuclear charge
2 . Atomic radius
3. Half filled and completely filled sub shell
4. Atomic number
1. Effective nuclear charge
2 . Atomic radius
3. Half filled and completely filled sub shell
4. Atomic number
Subtopic: Ionization Energy (IE) |
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The correct order of atomic radii of fluorine and neon (in pm) is respectively-
1. 72, 72
2. 160, 160
3. 72, 160
4. 160, 72
1. 72, 72
2. 160, 160
3. 72, 160
4. 160, 72
Subtopic: Atomic Size |
71%
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An incorrect properties of p-block elements among the following is -
1. Include both metals and non-metals.
2. Form mainly covalent bonds with other elements.
3. The ionisation enthalpies are relatively lesser than s-block elements.
4. Some of the p-block elements show variable or more than one oxidation states.
Subtopic: Ionization Energy (IE) |
80%
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The IUPAC name of an element with atomic number 119 is:
| 1. | Ununoctium | 2. | Ununennium |
| 3. | Unnilennium | 4. | Unununnium |
Subtopic: Modern Periodic Table & Periodicity |
82%
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NEET - 2022
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Match List-I with List-II:
| List-I Elements |
List-II Atomic radii (pm) |
||
| (a) | O | (i) | 88 |
| (b) | C | (ii) | 74 |
| (c) | B | (iii) | 66 |
| (d) | N | (iv) | 77 |
Choose the correct answer from the options given below:
| (a) | (b) | (c) | (d) | |
| 1. | (ii) | (i) | (iv) | (iii) |
| 2. | (iv) | (iii) | (ii) | (i) |
| 3. | (i) | (iv) | (iii) | (ii) |
| 4. | (iii) | (iv) | (i) | (ii) |
Subtopic: Atomic Size |
71%
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NEET - 2022
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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%
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NEET - 2022
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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%
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NEET - 2022
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The element expected to form the largest ion to achieve the nearest noble gas configuration is:
1. Na
2. O
3. F
4. N
1. Na
2. O
3. F
4. N
Subtopic: Atomic Size |
53%
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NEET - 2023
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Which one of the following represents all isoelectronic species?
1. \(\mathrm{Na^+ , Cl^-, O^- , NO^+}\)
2. \(\mathrm{N_2O, N_2O_4 , NO^+, NO}\)
3. \(\mathrm{Na^+ , Mg^{2+} , O^- , F^-}\)
4. \(\mathrm{Ca^{2+} , Ar, K^+, Cl^-}\)
1. \(\mathrm{Na^+ , Cl^-, O^- , NO^+}\)
2. \(\mathrm{N_2O, N_2O_4 , NO^+, NO}\)
3. \(\mathrm{Na^+ , Mg^{2+} , O^- , F^-}\)
4. \(\mathrm{Ca^{2+} , Ar, K^+, Cl^-}\)
Subtopic: Ionization Energy (IE) |
75%
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NEET - 2023
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