Q. No.Which of the following has the highest electronegativity?
1.
Carbon
2.
Oxygen
3.
Boron
4.
Fluorine
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Which of the following orders of ionic radii is correctly represented?
| 1. | H–>H>H+ | 2. | Na+>F–>O2– |
| 3. | F–>O2–>Na+ | 4. | N3–>Mg2+<Al3+ |
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Which of the following orders is correct for the given properties?
1. F > Cl > Br > I (Electron affinity)
2. I-> I > I+ (Ionisation Energy)
3. I-> I > I+ (Atomic/ionic radii)
4. I+7 > I+ > I+5 (Ionisation Energy)
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Zinc (Zn) and Cadmium (Cd) generally do not exhibit variable oxidation states, unlike most transition elements. This behavior is primarily attributed to:
1. Softness
2. Completed 'd' orbital
3. Two electrons in outermost orbit
4. Low m.p.
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Match the name of elements given in list-I with the corresponding electronic configuration given in list-II and select the correct answer using the codes given below:
|
List-I (element) |
List-II (electronic configuration) |
||
| (a) |
Gallium |
1. |
1s2 2s2 2p6 3s2 3p6 4s2 3d1 |
| (b) |
Vanadium |
2. |
1s2 2s2 2p6 3s2 3p6 4s2 3d10 |
| (c) |
Zinc |
3. |
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p1 |
| (d) |
Scandium |
4. |
1s2 2s2 2p6 3s2 3p6 4s2 3d3 |
Codes :
| (a) | (b) | (c) | (d) | |
| 1. | 2 | 1 | 3 | 4 |
| 2. | 3 | 4 | 1 | 2 |
| 3. | 3 | 4 | 2 | 1 |
| 4. | 1 | 2 | 4 | 3 |
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Among the following oxides: \(\mathrm{P_2O_5}, \mathrm{As_2O_3}, \mathrm{Sb_2O_3}, and~ \mathrm{Bi_2O_3}\), which one exhibits the highest acidic character?
1.
2.
3.
4.
The first four ionization energy values of a metal are 191, 587, 872, and 5962 kcal/mol respectively. The number of valence electrons in the element is/are:
1. 1
2. 2
3. 3
4. 5
Transition elements exhibit variable oxidation states because they release electrons from the following orbits:
1. ns and np orbits
2. (n-1)d and ns orbits
3. (n-1)d orbits
4. ns orbits
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