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Q. No.| Assertion (A): | Fluorine forms only one oxoacid, HOF. |
| Reason (R): | Fluorine has a small size and the highest electronegativity. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A) |
| 2. | Both (A) and (R) are True and (R) is not the correct explanation of (A) |
| 3. | (A) is True, but (R) is False |
| 4. | (A) is False, but (R) is True |
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The basic difference between the electron gain enthalpy (Ea) and electronegativity (EN) is:
| 1. | Ea is the tendency to lose electrons, while EN is the tendency to repel the shared pairs of electrons. |
| 2. | Ea is the tendency to gain neutrons, while EN is the tendency to attract the shared pairs of electrons. |
| 3. | Ea is the tendency to donate electrons, while EN is the tendency to attract the shared pairs of molecules. |
| 4. | Ea is the tendency to gain electrons, while EN is the tendency to attract the shared pairs of electrons. |
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The electronegativity of the following elements increases in the order of:
| 1. | S < P < N < O | 2. | P < S < N < O |
| 3. | N < O < P < S | 4. | N < P < S < O |
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Allred Rochow's scale is related to:
1. Electronegativity, radius, and Z*
2. Resonance energy of the molecule, ionisation potential and electron affinity.
3. Bond Polarity, diagonal relationship and periodicity.
4. None of the above.
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The incorrect order of electronegativity is :
| 1. | Cl > S > P > Si | 2. | Si > Al > Mg > Na |
| 3. | F > Cl > Br > I | 4. | None of the above. |
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The statement that "the electronegativity of N on the Pauling scale is 3.0 in all the nitrogen compounds" is incorrect because:
| 1. | Electronegativity of an element is a variable property. |
| 2. | Pauling scale is not used to measure electronegativity. |
| 3. | The electronegativity of N on the Pauling scale is 12.0 |
| 4. | None of the above. |
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The electronegativity values of elements X and Y are 2.1 and 3.0, respectively.
Calculate the percentage ionic character of the X–Y bond.
| 1. | 20 | 2. | 30 |
| 3. | 17 | 4. | 23 |
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Q. No.
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