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Q. No.The IUPAC name of an element with atomic number 119 is:
1.
Ununoctium
2.
Ununennium
3.
Unnilennium
4.
Unununnium
Subtopic: Modern Periodic Table & Periodicity |
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NEET - 2022
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| Assertion (A): | First ionization energy for nitrogen is lower than that of oxygen. |
| Reason (R): | Across a period, effective nuclear charge decreases. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Ionization Energy (IE) |
79%
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Subtopic: Modern Periodic Table & Periodicity |
56%
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| Assertion (A): | The shielding effect increase as we go down the group. |
| Reason (R): | More is the number of electrons in the penultimate shell, and more is shielding. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Screening Effect |
65%
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Given below are two statements:
1. Both statement I and statement II are true.
2. Both statement I and statement II are false.
3. Statement I is correct but statement II is false.
4. Statement I is incorrect but statement II is true.
| Statement I: | Generally, only non-metal oxides are acidic but oxides of some metals in high oxidation state are also found to have an acidic character. |
Statement II: |
Oxides like CO, NO, and N2O are neutral oxides. |
1. Both statement I and statement II are true.
2. Both statement I and statement II are false.
3. Statement I is correct but statement II is false.
4. Statement I is incorrect but statement II is true.
Subtopic: Nature of Compound |
86%
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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 statement among the following is:
| 1. | Lothar Meyer plotted the physical properties against the atomic number and obtained a periodically repeated pattern. |
| 2. | French geologist, Chancourtois made a cylindrical table of elements to display the periodic recurrence of properties. |
| 3. | Mendeleev realized that some of the elements did not fit in with his scheme of classification if the order of atomic number was strictly followed. |
| 4. | Seaborg was awarded the Nobel Prize in chemistry for his work and Element 101 has been named Seaborgium (Sg) in his honour. |
Subtopic: Evolution of Periodic Table | Modern Periodic Table & Periodicity |
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From the given pairs below, the pair in which both elements have the same electronegativity is
1. O and Cl
2. N and Cl
3. N and Br
4. C and Br
1. O and Cl
2. N and Cl
3. N and Br
4. C and Br
Subtopic: Electronegativity |
59%
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The correct order of least negative to most negative electron gain enthalpy for C, Ca, Al, F and O is:
1. Al < Ca < O < C < F
2. Al < O < C < Ca < F
3. C < F < O < Al < Ca
4. Ca < Al < C < O < F
1. Al < Ca < O < C < F
2. Al < O < C < Ca < F
3. C < F < O < Al < Ca
4. Ca < Al < C < O < F
Subtopic: Electron Affinity (EA) |
82%
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NEET - 2013
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Subtopic: Nature of Compound |
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