Consider the following four elements, which are represented according to long form of periodic table.
Here W, Y and Z are left, up and right elements with respect to the element 'X' and 'X' belongs to 16th group and 3rd period. Then according to given information the incorrect statement regarding given elements is:
1. Maximum electronegativity :Y
2. Maximum catenation property :X
3. Maximum electron affinity :Z
4. Y exhibits variable covalency
Here W, Y and Z are left, up and right elements with respect to the element 'X' and 'X' belongs to 16th group and 3rd period. Then according to given information the incorrect statement regarding given elements is:
The ground state electronic configurations of the elements, U,V,W,X,and Y (these symbols do not have any chemical significance) are as follows:
\(\begin{array}{ll} \mathrm U & 1 s^2 2 s^2 2 p^3 \\ \mathrm{V} & 1 s^2 2 s^2 2 p^6 3 s^1 \\ \mathrm{W} & 1 s^2 2 s^2 2 p^6 3 s^2 3 p^2 \\ \mathrm{X} & 1 s^2 2 s^2 2 p^6 3 s^2 3 p^6 3 d^5 4 s^2 \\ \mathrm{Y} & 1 s^2 2 s^2 2 p^6 3 s^2 3 p^6 3 d^{10} 4 s^2 4 p^6 \end{array}\)
Determine which sequence of elements satisfies the following statements :
| (i) | Element forms a carbonate that is not decomposed by heating |
| (ii) | An element is most likely to form coloured ionic compounds |
| (iii) | Element has the largest atomic radius |
| (iv) | Element forms only an acidic oxide |
1. V W Y U
2. V X Y W
3. V W Y X
4. V X W U
In alkaline earth metals, the properties, from the following, that will increase from Be to Ba are-
(i) Atomic radius
(ii) Ionisation energy
(iii) Nuclear charge
| 1. | (i) and (ii) | 2. | (i) and (iii) |
| 3. | (ii) and (iii) | 4. | (i), (ii), and (iii) |
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 N is higher than that of O while of O is higher than that of N. |
| 4. | The electron affinity N is almost zero while that of P 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
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