Q. No.The element having a greatest difference between its first and second ionization energies, is:
1. Ca
2. Sc
3. K
4. Ba
The oxidation state and covalency of Al in [AlCl(H2O)5]2+ are respectively:
1. +3 and 3
2. +6 and 2
3. +3 and 6
4. +2 and 2
The correct representation of the first ionization enthalpy for
Ca, Ba, S, Se, and Ar in increasing order, among the following, is:
1. Ba < Ca < Se < S < Ar
2. Ca < Ba < S < Se < Ar
3. Ca < S < Ba < Se < Ar
4. S < Se < Ca < Ba < Ar
The properties among the following can be shown by the element belonging
to the 3rd period and group 13 of the periodic table:
(a) Good conductor of electricity
(b) Liquid, metallic
(c) Solid, metallic
(d) Solid, non-metallic
Choose the correct option :
1. (a), (c)
2. (b), (c)
3. (c), (d)
4. (b), (d)
In which following options of arrangement does not agree with the variation of the property indicated against it?
| (a) | Al3+< Mg2+< Na+< F– (Increasing ionic size) |
| (b) | B < C < N (Increasing atomic size) |
| (c) | I < Br < Cl (Increasing atomic size) |
| (d) | Li < Na < K (Metallic character) |
Choose the correct option
| 1. | (a), (d) | 2. | (b), (c) |
| 3. | (c), (d) | 4. | (b), (d) |
Among the following, the elements that can show covalency greater than 4 is/are:
(a) Be
(b) P
(c) S
(d) B
Choose the correct option
1. (a), (d)
2. (b), (c)
3. (c), (d)
4. (b), (d)
The incorrect statement about ionization enthalpy is:
| 1. | Ionization enthalpy increases for each successive electron. |
| 2. | Noble gases have the highest ionization enthalpy. |
| 3. | A big jump in ionization enthalpy indicates a stable configuration. |
| 4. | Ionization enthalpy of oxygen is higher than that of nitrogen. |
The formula of the stable binary compounds that would be formed by an element having atomic number 71 and fluorine:
1. LuF6
2. LuF2
3. LuF3
4. LuF4
The general outer electronic configuration of s, p, d , and f-block elements respectively would be :
| 1. | ns1-2, ns2np1-6, (n-1)d1-10np0-2, (n+2)f1-14(n-1)d0-10ns2 |
| 2. | ns1-2, ns2np1-6, (n-1)f1-10ns0-2, (n-2)f1-14nd0-1ns2 |
| 3. | ns1-2, ns2np1-6, (n-1)d1-10ns1-2, (n-2)f1-14(n-1)d0-1 ns2 |
| 4. | ns1-2, ns2np1-6, (n-1)d1-10ns0-2, (n-2)f1-14(n-2)d0-10ns2 |
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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