Q. No.
Consider the following changes:
The second ionization energy of M could be calculated from the energy values associated with :
(a) 1+3+4 (b) 2-1+3
(c) 1+5 (d) 5-3
Which of the following statements is incorrect?
| 1. | Van der Waals' radius of iodine is more than its covalent radius. |
| 2. | All isoelectronic ions belong to the same period of the periodic table. |
| 3. | of the nitrogen atom is higher than that of the oxygen atom, while of the oxygen atom is higher than that of the nitrogen atom. |
| 4. | The electron affinity of the nitrogen atom is almost zero while that of the phosphorus atom is 74.3 kJ |
Aqueous solutions of two compounds are prepared in two different beakers. If, the electronegativity of then the nature of two solutions will be respectively:
(a) acidic, basic (b) acidic, acidic
(c) basic, acidic (d) basic, basic
First three ionisation energies (in kJ/mol) of three representative elements are given below:
Element
P 495.8 4562 6910
Q 737.7 1451 7733
R 577.5 1817 2745
Then incorrect option is :
1. Q: Alkaline earth metal.
2. P: Alkali metal.
3. R: s-block element.
4. All three: P,Q & R belong to the same period.
If the ionization enthalpy and negative electron gain enthalpy of an element are 275 and 86 kcal respectively, then the electronegativity of the element on the Pauling scale is:
1. 2.8
2. 0.0
3. 4.0
4. 2.6
The incorrect statement is:
(1) The second ionisation energy of Se is greater than that of second ionisation energy of As
(2) The first ionisation energy of ion is greater than that of first ionisation energy of ion
(3) The third ionisation energy of F is greater than that of third ionisation energy of O
(4) Helogens have highest I.E. in respective period
Consider the following ionisation reactions :
I.E. (kJ )
If monovalent positive ion of A, divalent positive ion of B and trivalent positive ion of C have zero electron. Then incorrect order of corresponding I.E. is :
(1)
(2)
(3)
(4)
The incorrect match among the following options is:
| 1. |
\([Ar]3d^54s^1 \rightarrow 4^{th} \text {period}, 6^{th} \text {group}\) |
| 2. | \([Kr]4d^{10} \rightarrow 5^{th} \text {period}, 12^{th} \text {group}\) |
| 3. | \([Rn]6d^2 7s^2\rightarrow 7^{th} \text {period}, 3^{rd} \text {group}\) |
| 4. | \([Xe]4f^{14} 5d^26s^2 \rightarrow 6^{th} \text {period}, 4^{th} \text {group}\) |
Which of the following order is correct for the property mentioned in brackets?
(Ionisation energy)
(2nd Ionisation energy)
(Electronegativity)
(Ionic radius)
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