Correct expression of "Allred and Rochow's" scale is:
(a) Electronegativity =
(b) Electronegativity =
(c) Electronegativity =
(d) Electronegativity =
If P and T are second period p-block elements then which of the following graph show correct relation between valence electrons in to (corresponding molecules) and their bond order is :
(a) 
(b)
(c) 
(d)
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
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
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