- 1(current)
Q. No.In which of the following molecule, the internuclear distance will be maximum:
1. CsI
2. CsF
3. LiF
4. LiI
The first ionization potential of Be and B will be:
1. 8.8 and 8.8
2. 6.6 and 6.6
3. 6.6 and 8.8
4. 8.8. and 6.6
An electronic configuration that has maximum difference between II and III ionization potential is:
1. 1s2 2s2 2p6 3s1
2. 1s2 2s2 2p6 3s2
3. 1s2 2s2 2p6
4. 1s2 2s2 2p5
The correct order of IP(ionization potential) among the following elements Be, B, C, N, O is:
| 1. | B < Be < C < O < N | 2. | B < Be < C < N < O |
| 3. | Be < B < C < N < O | 4. | Be < B < C < O < N |
Incorrect order among the following is:
| 1. | NH3 < PH3 < AsH3 – Acidic |
| 2. | Li < Be < B < C – Ist Ionization potential |
| 3. | Al2O3 < MgO < Na2O < K2O - Basic |
| 4. | Li+ < Na+ < K+ < Cs+ - Ionic radius |
If an atom has electronic configuration 1s22s22p63s23p63d34s2, we will place it in group number:
| 1. | Fifth | 2. | Fifteenth |
| 3. | Second | 4. | Third |
The ions O2–, F–, Na+, Mg2+, and Al3+ are isoelectronic. Their ionic radii show:
| 1. | A significant increase from O2– to Al3+. |
| 2. | A significant decrease from O2– to Al3+. |
| 3. | An increase from O2– to F– and then a decrease from Na+ to Al3+. |
| 4. | A decrease from O2– to F– and then an increase from Na+ to Al3+. |
Ionic radii are:
| 1. | Inversely proportional to the square of effective nuclear charge. |
| 2. | Directly proportional to the effective nuclear charge. |
| 3. | Directly proportional to the square of effective nuclear charge. |
| 4. | Inversely proportional to the effective nuclear charge. |
Which one of the following oxides is expected to exhibit paramagnetic behaviour:
1. CO2
2. ClO2
3. SO2
4. SiO2
Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species?
1. F < Cl < O < S
2. S < O < Cl < F
3. O < S < F < Cl
4. Cl < F < S < O
- 1(current)
Q. No.
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