Problem 27
About transuranic elements the wrong statement is, they (1) are of higher atomic number than uranium (2) belong to actinide series (3) are radioactive and decay into other elements (4) occur naturally
Problem 28
The false statement among the following is (1) Inert gases belong to p-block. (2) f-block elements are called inner transition elements . (3) Lanthanum is a member of f-block clement. (4) The clement with \(Z=106\) belong to \(\mathrm{d}\) -block.
Problem 30
The maximum atomic radius exists for (1) \(\mathrm{Mg}\) (2) \(\mathrm{N}\) (3) Si (4) \(\mathrm{P}\)
Problem 31
As we move along the periodic table from left to right the atomic size decreases. However, noble gases have the largest size because of (1) covalent radii (2) ionic radii (3) Van der Wall's radii (4) stable octet
Problem 32
Which relation represent the correct relationship of the radius of an atom, its cation and its anion? (1) atom = cation \(=\) anion (2) atom \(>\) cation \(>\) anion (3) atom \(>\) cation \(<\) anion (4) atom \(<\) cation \(>\) anion
Problem 33
Which relation represent the correct relationship of the radius of an atom, its cation and its anion? (1) atom \(=\) cation \(=\) anion (2) atom \(>\) cation \(>\) anion (3) atom \(>\) cation \(<\) anion (4) atom \(<\) cation \(>\) anion
Problem 39
Which is correct among the following statements? (1) Radius of Cl atom is \(0.99 \AA\) while that of \(\mathrm{Cl}^{4}\) ion is \(1.54 \AA\). (2) Radius of \(\mathrm{Cl}\) atom is \(0.99 \mathrm{~A}\) while that of \(\mathrm{Na}\) atom is \(1.54 \mathrm{~A}\). (3) Radius of Cl atom is \(0.95 \Lambda\) while that of \(\mathrm{Cl}^{-}\) ion is \(0.81 \AA\). (4) Radius of Na atom is \(0.95 \AA\) while that of \(\mathrm{Na}\) ' ion is \(1.54 \Lambda\).
Problem 43
Which of the series of elements listed below would have nearly same atomic radii (1) \(\mathrm{F}, \mathrm{Cl}, \mathrm{Br}, \mathrm{I}\) (2) \(\mathrm{Na}, \mathrm{K}, \mathrm{Rb}, \mathrm{Cs}\) (3) \(\mathrm{Li}, \mathrm{Be}, \mathrm{B}, \mathrm{C}\) (4) \(\mathrm{Fe}, \mathrm{Co}, \mathrm{Ni}, \mathrm{Cu}\)
Problem 44
Which one of the following indicates the correct order of atomic size?
(1) \(\mathrm{Be}>\mathrm{F}>\mathrm{C}>\mathrm{Ne}\)
(2) \(\mathrm{Be}
Problem 45
In isoclectronic cations, ion having more nuclear charge has the size (1) higher (2) smaller (3) equal (4) cannot be determined
