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Q. No.Identify the incorrect statement from the following:
| 1. | The IUPAC name of the element with atomic number 107 is Unnilseptium. |
| 2. | The largest and the smallest species among \(\text{Mg}\), \(\text{Mg}^{2+}\), \(\text{Al}\) and \(\text{Al}^{3+}\) are \(\text{Al}\) and \(\text{Mg}^{2+}\), respectively. |
| 3. | The similarity in behaviour of \(\text{Li}\) with \(\text{Mg}\) is referred to as 'diagonal relationship'. |
| 4. | The oxidation state and covalency of \(\text{Al}\) in \([\text{AlCl}(\text{H}_2\text{O})_5]^{2+}\) are 3 and 6 respectively. |
Subtopic: Modern Periodic Table & Periodicity | Atomic Size |
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The correct order of increasing metallic character of Na, Be, P, Mg and Si is:
1. P < Si < Be < Mg < Na
2. Be < Si < P < Mg < Na
3. P < Si < Na < Mg < Be
4. P< Mg < Be < Si < Na
1. P < Si < Be < Mg < Na
2. Be < Si < P < Mg < Na
3. P < Si < Na < Mg < Be
4. P< Mg < Be < Si < Na
Subtopic: Modern Periodic Table & Periodicity | Nature of Compound |
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Among the following options, the correct trend in the electron gain enthalpy is:
| 1. | I > Br > Cl > F |
| 2. | F > Cl > Br > I |
| 3. | Br > Cl > F > I |
| 4. | Cl > F > Br > I |
Subtopic: Electron Affinity (EA) |
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Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R
In light of the above statements, choose the most appropriate answer from the options given below:
| Assertion (A): | The first ionization enthalpy of O is lower than that of N and F. |
| Reason (R): | The loss of an electron from O leads to stable half-filled p orbital. |
| 1. | (A) is not correct but (R) is correct. |
| 2. | Both (A) and (R) are correct and (R) is the correct explanation of (A). |
| 3. | Both (A) and (R) are correct and (R) is NOT the correct explanation of (A). |
| 4. | (A) is correct but (R) is not correct. |
Subtopic: Ionization Energy (IE) |
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Which of the following statements are true?
Choose the correct answer from the options given below:
| A. | Unlike Ga that has a very high melting point, Cs has a very low melting point. |
| B. | On Pauling scale, the electronegativity values of N and Cl are not the same. |
| C. | \(Ar, K^+, Cl^-, Ca^{2+}\) and \(S^{2-}\) are all isoelectronic species. |
| D. | The correct order of the first ionization enthalpies of Na, Mg, Al, and Si is Si > Al > Mg > Na |
| E. | The atomic radius of Cs is greater than that of Li and Rb. |
| 1. | C and D only | 2. | A, C and E only |
| 3. | A, B and E only | 4. | C and E only |
Subtopic: Ionization Energy (IE) | Electronegativity |
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Which of the following electronic configurations belong to the main group elements?
Choose the correct answer from the option given below:
| A | \([\mathrm{Ne}] 3 \mathrm{~s}^1\) | B | \([\mathrm{Ar}] 3d^3 \mathrm{~4s}^2\) |
| C | \([\mathrm{Kr}] 4 \mathrm{~d}^{10} 5 \mathrm{~s}^2 5 \mathrm{p}^5\) | D | \([\mathrm{Ar}] 3 \mathrm{~d}^{10} 4 \mathrm{~s}^1\) |
| E | \(\mathrm{[R n] }5 f^0 6 d^2 7 s^2\) | ||
Choose the correct answer from the option given below:
| 1. | D and E only | 2. | A, C and D only |
| 3. | B and E only | 4. | A and C only |
Subtopic: Modern Periodic Table & Periodicity |
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Arrange the elements Li, Be, B, C, and N in increasing order of their first ionization enthalpies:
| 1. | Li < B < Be < C < N | 2. | Li < Be < C < B < N |
| 3. | Li < Be < N < B < C | 4. | Li < Be < B < C < N |
Subtopic: Ionization Energy (IE) |
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Which of the following arrangements is correct for increasing order of electronegativity?
| 1. | Si < C < O < N < F | 2. | O < F < N < C < Si |
| 3. | F < O < N < C < Si | 4. | Si < C < N < O < F |
Subtopic: Electronegativity |
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Identify the incorrect statement:
| 1. | The oxidation state and coordination number (or covalency) of \(\mathrm{Al}\) in\( \left[\mathrm{AlCl}\left(\mathrm{{H}_2 {O}}\right)_5\right]^{2+} \) are +3 and 6, respectively. |
| 2. | \(\mathrm{Na}_2 \mathrm{O}\) is a basic oxide and \(\mathrm{Cl}_2 \mathrm{O}_7\) is an acidic oxide |
| 3. | The following four species are called isoelectronic species: \( \mathrm{O}^{2-}, \mathrm{F}^{-}, \mathrm{Na}^{+} \mathrm{and}~ \mathrm{Mg}^{2+}\) |
| 4. | Among the four species \(\mathrm{Mg}, \mathrm{Al}, \mathrm{Mg}^{2+}\) and \(\mathrm{A l^{3+},}\) the smallest one is \(\mathrm{Al}.\) |
Subtopic: Nature of Compound |
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Match List-I with List-II:
Choose the correct answer from the options given below:
| List-I (IUPAC official name) |
List-II (IUPAC Symbol) |
||
| A. | Mendelevium | I. | Mt |
| B. | Meitnerium | II. | Mc |
| C. | Moscovium | III. | No |
| D. | Nobelium | IV. | Md |
Choose the correct answer from the options given below:
| 1. | A-III, B-I, C-II, D-IV | 2. | A-IV, B-II, C-I, D-III |
| 3. | A-IV, B-I, C-II, D-III | 4. | A-I, B-IV, C-II, D-III |
Subtopic: Modern Periodic Table & Periodicity |
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