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)
Among the following sequences, the sequence contains atomic numbers of only representative elements is/are:
(a) | 3, 33, 53, 87 | (b) | 2, 10, 22, 36 |
(c) | 7, 17, 25, 37, 48 | (d) | 9, 35, 51, 88 |
Choose the correct option:
1. (a), (d)
2. (b), (c)
3. (c), (d)
4. (b), (d)
An element(s) that gain one electron more readily in comparison to other elements of their group is/are:
(a) S(g)
(b) Na(g)
(c) O(g)
(d) Cl(g)
Choose the correct option:
1. (a), (d)
2. (b), (c)
3. (c), (d)
4. (b), (d)
Correct statement(s) among the following are:
(a) | Helium has the highest first ionisation enthalpy in the periodic table. |
(b) | Chlorine has less negative electron gain enthalpy than fluorine. |
(c) | Mercury and bromine are liquids at room temperature. |
(d) | In any period, the atomic radius of alkali metal is the highest. |
Choose the correct option:
1. (a), (c), (d)
2. (a), (b), (c)
3. (a), (c)
4. (a), (d)
Given are the following sets of species:
(a)
(b)
(c)
(d)
The sets containing only isoelectronic ions among the above are:
1. (a), (d)
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) |
The term(s), that does not have a unit among the following, is/are:
(a) Electronegativity
(b) Electron gain enthalpy
(c) Ionization enthalpy
(d) Metallic character
Choose the correct option:
1. (a), (d)
2. (b), (c)
3. (c), (d)
4. (b), (d)
The ionic radii vary in :
(a) | Inverse proportion to the effective nuclear charge. |
(b) | Inverse proportion to the square of effective nuclear charge. |
(c) | Direct proportion to the screening effect. |
(d) | Direct proportion to the square of screening effect. |
Choose the correct option :
1. (a), (c)
2. (b), (c)
3. (c), (d)
4. (b), (d)
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)
Amongst the following elements whose electronic configuration are given below, the one having the highest ionisation enthalpy is:
1.
2.
3.
4.