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Q. No.The pair of elements which is not placed in the same group in Mendeleev's periodic table is:
1. Sc, Ga
2. Mn, Br
3. Nb, Sb
4. Rb, Cd
1. Sc, Ga
2. Mn, Br
3. Nb, Sb
4. Rb, Cd
Subtopic: Evolution of Periodic Table |
Level 4: Below 35%
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In Mendeleev's periodic table, a number of series and groups are X and Y respectively. X and Y are:
1. X=12, Y=9
2. X=8, Y=9
3. X=8, Y=8
4. X=12, Y=8
1. X=12, Y=9
2. X=8, Y=9
3. X=8, Y=8
4. X=12, Y=8
Subtopic: Evolution of Periodic Table |
Level 4: Below 35%
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Find the incorrect match among the following electronic configurations and their corresponding period and group numbers.
1. [Ar] 3d⁵ 4s¹ → 4th period, 6th group2. [Kr] 4d¹⁰ → 5th period, 12th group
3. [Rn] 6d² 7s² → 7th period, 3rd group
4. [Xe] 4f¹⁴ 5d² 6s² → 6th period, 4th group
Subtopic: Electronic Configuration |
51%
Level 3: 35%-60%
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The element having electronic configuration [Kr]4d104f14, 5s25p6, 6s2 belongs to:
1. s-block
2. p-block
3. d-block
4. f-block
Subtopic: Electronic Configuration |
Level 3: 35%-60%
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The correct electronic configuration of an element that is just above the 4th period and belongs to the 16th group is:
1. 4s23d104p4
2. 2s22p4
3. 3s23p4
4. 5s25d104p4
1. 4s23d104p4
2. 2s22p4
3. 3s23p4
4. 5s25d104p4
Subtopic: Electronic Configuration |
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Level 2: 60%+
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Which of the following options shows an incorrect order of ionic radii?
1. Sr2+<Rb+<Br-<Se2-
2. Nb5+<Zr4+<Y3+
3. Co>Co2+>Co3+>Co4+
4. Ba2+>Cs+<Se2-<As3-
Subtopic: Atomic Size |
66%
Level 2: 60%+
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Which of the following pairs has the most significant size variation?
| 1. | Na and Na+ | 2. | Na and K |
| 3. | Cl and Cl– | 4. | Mg and Mg+ |
Subtopic: Atomic Size |
Level 4: Below 35%
Hints
Given below are pair of species. Which pair has the largest difference in sizes?
| 1. | Na and K | 2. | K and K+ |
| 3. | Cl and Cl- | 4. | Cl and Br |
Subtopic: Atomic Size |
Level 3: 35%-60%
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Given below are two statements:
| Assertion (A): | The helium atom has the highest ionization energy among all the elements. |
| Reason (R): | Helium is the smallest atom among all the elements. |
| 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) |
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Level 3: 35%-60%
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Which is the correct order of ionization energies?
1. F- > F > Cl- > Cl
2. F > Cl > Cl- > F-
3. F- > Cl- > Cl > F
4. F- > Cl- > F > Cl
Subtopic: Ionization Energy (IE) |
50%
Level 3: 35%-60%
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