Classification of Elements and Periodicity in Properties
89388
Which is responsible for the diagonal relation of lithium with magnesium?
1 Less ionic radii
2 High polarising power
3 Approximately equal electronegativity and affinity
4 All of the above
Explanation:
The diagonal relationship of lithium with magnesium are- - Both have almost similar electro negativity - Both $\mathrm{Li}$ and $\mathrm{Mg}$ are quite hard They are harder and lighter than other elements in their receptive group. - Both Lithium and magnesium have small size and high charge density. - They are low and almost same. Their ionic radii are similar.
CG PET -2006
Classification of Elements and Periodicity in Properties
89396
Which one shows most pronounced inert pair effect?
1 $\mathrm{Si}$
2 $\mathrm{Sn}$
3 $\mathrm{Pb}$
4 $\mathrm{C}$
Explanation:
Inert pair effect is observed in the elements of group $13 \mathrm{up}$ to group 17. It can be defined as the inability of $\mathrm{S}$ electron inheavier P-block elements to participate in bonding. The stability of oxidation states two units less than the maximum oxidation of a group increases down the group. Inert pair effect is a result at poor shielding of $\mathrm{d}$ and $\mathrm{f}$ orbital and filling of electron in $\mathrm{Al}$ does not involve any d or f-orbital. Thus, the Pd is most likely to show innert pair effect.
J and K CET-(2004)
Classification of Elements and Periodicity in Properties
89400
Which group of periodic table contains no metal?
1 $\mathrm{IA}$
2 IIIA
3 VIIA
4 VIII
Explanation:
The group VII A of halogens such as fluorine, chlorine, bromine, iodine etc. The word halogen means salt producing so halogen react with metal to form salt and halogen family has nometals. Group IA and III A contain mostly metals and group VIII contains transition elements which are metals.
AIIMS-1999
Classification of Elements and Periodicity in Properties
89402
Which of the following has the smallest size?
1 $\mathrm{Al}^{3+}$
2 $\mathrm{F}^{-}$
3 $\mathrm{Na}^{+}$
4 $\mathrm{Mg}^{2+}$
Explanation:
The size of cation is small then their neutral atom because it has less electrons while its nuclear charge remains the same. So, the nucleus attracts the electron more towards itself and leads to the decrease in size. $\mathrm{Al}^{3+}$ ion has smallest size. - When an atom losses electrons, it results in the formation of positive ion known as cation. - When an atom gains electrons, it results in the formation of negative ion known as anion.
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Classification of Elements and Periodicity in Properties
89388
Which is responsible for the diagonal relation of lithium with magnesium?
1 Less ionic radii
2 High polarising power
3 Approximately equal electronegativity and affinity
4 All of the above
Explanation:
The diagonal relationship of lithium with magnesium are- - Both have almost similar electro negativity - Both $\mathrm{Li}$ and $\mathrm{Mg}$ are quite hard They are harder and lighter than other elements in their receptive group. - Both Lithium and magnesium have small size and high charge density. - They are low and almost same. Their ionic radii are similar.
CG PET -2006
Classification of Elements and Periodicity in Properties
89396
Which one shows most pronounced inert pair effect?
1 $\mathrm{Si}$
2 $\mathrm{Sn}$
3 $\mathrm{Pb}$
4 $\mathrm{C}$
Explanation:
Inert pair effect is observed in the elements of group $13 \mathrm{up}$ to group 17. It can be defined as the inability of $\mathrm{S}$ electron inheavier P-block elements to participate in bonding. The stability of oxidation states two units less than the maximum oxidation of a group increases down the group. Inert pair effect is a result at poor shielding of $\mathrm{d}$ and $\mathrm{f}$ orbital and filling of electron in $\mathrm{Al}$ does not involve any d or f-orbital. Thus, the Pd is most likely to show innert pair effect.
J and K CET-(2004)
Classification of Elements and Periodicity in Properties
89400
Which group of periodic table contains no metal?
1 $\mathrm{IA}$
2 IIIA
3 VIIA
4 VIII
Explanation:
The group VII A of halogens such as fluorine, chlorine, bromine, iodine etc. The word halogen means salt producing so halogen react with metal to form salt and halogen family has nometals. Group IA and III A contain mostly metals and group VIII contains transition elements which are metals.
AIIMS-1999
Classification of Elements and Periodicity in Properties
89402
Which of the following has the smallest size?
1 $\mathrm{Al}^{3+}$
2 $\mathrm{F}^{-}$
3 $\mathrm{Na}^{+}$
4 $\mathrm{Mg}^{2+}$
Explanation:
The size of cation is small then their neutral atom because it has less electrons while its nuclear charge remains the same. So, the nucleus attracts the electron more towards itself and leads to the decrease in size. $\mathrm{Al}^{3+}$ ion has smallest size. - When an atom losses electrons, it results in the formation of positive ion known as cation. - When an atom gains electrons, it results in the formation of negative ion known as anion.
Classification of Elements and Periodicity in Properties
89388
Which is responsible for the diagonal relation of lithium with magnesium?
1 Less ionic radii
2 High polarising power
3 Approximately equal electronegativity and affinity
4 All of the above
Explanation:
The diagonal relationship of lithium with magnesium are- - Both have almost similar electro negativity - Both $\mathrm{Li}$ and $\mathrm{Mg}$ are quite hard They are harder and lighter than other elements in their receptive group. - Both Lithium and magnesium have small size and high charge density. - They are low and almost same. Their ionic radii are similar.
CG PET -2006
Classification of Elements and Periodicity in Properties
89396
Which one shows most pronounced inert pair effect?
1 $\mathrm{Si}$
2 $\mathrm{Sn}$
3 $\mathrm{Pb}$
4 $\mathrm{C}$
Explanation:
Inert pair effect is observed in the elements of group $13 \mathrm{up}$ to group 17. It can be defined as the inability of $\mathrm{S}$ electron inheavier P-block elements to participate in bonding. The stability of oxidation states two units less than the maximum oxidation of a group increases down the group. Inert pair effect is a result at poor shielding of $\mathrm{d}$ and $\mathrm{f}$ orbital and filling of electron in $\mathrm{Al}$ does not involve any d or f-orbital. Thus, the Pd is most likely to show innert pair effect.
J and K CET-(2004)
Classification of Elements and Periodicity in Properties
89400
Which group of periodic table contains no metal?
1 $\mathrm{IA}$
2 IIIA
3 VIIA
4 VIII
Explanation:
The group VII A of halogens such as fluorine, chlorine, bromine, iodine etc. The word halogen means salt producing so halogen react with metal to form salt and halogen family has nometals. Group IA and III A contain mostly metals and group VIII contains transition elements which are metals.
AIIMS-1999
Classification of Elements and Periodicity in Properties
89402
Which of the following has the smallest size?
1 $\mathrm{Al}^{3+}$
2 $\mathrm{F}^{-}$
3 $\mathrm{Na}^{+}$
4 $\mathrm{Mg}^{2+}$
Explanation:
The size of cation is small then their neutral atom because it has less electrons while its nuclear charge remains the same. So, the nucleus attracts the electron more towards itself and leads to the decrease in size. $\mathrm{Al}^{3+}$ ion has smallest size. - When an atom losses electrons, it results in the formation of positive ion known as cation. - When an atom gains electrons, it results in the formation of negative ion known as anion.
Classification of Elements and Periodicity in Properties
89388
Which is responsible for the diagonal relation of lithium with magnesium?
1 Less ionic radii
2 High polarising power
3 Approximately equal electronegativity and affinity
4 All of the above
Explanation:
The diagonal relationship of lithium with magnesium are- - Both have almost similar electro negativity - Both $\mathrm{Li}$ and $\mathrm{Mg}$ are quite hard They are harder and lighter than other elements in their receptive group. - Both Lithium and magnesium have small size and high charge density. - They are low and almost same. Their ionic radii are similar.
CG PET -2006
Classification of Elements and Periodicity in Properties
89396
Which one shows most pronounced inert pair effect?
1 $\mathrm{Si}$
2 $\mathrm{Sn}$
3 $\mathrm{Pb}$
4 $\mathrm{C}$
Explanation:
Inert pair effect is observed in the elements of group $13 \mathrm{up}$ to group 17. It can be defined as the inability of $\mathrm{S}$ electron inheavier P-block elements to participate in bonding. The stability of oxidation states two units less than the maximum oxidation of a group increases down the group. Inert pair effect is a result at poor shielding of $\mathrm{d}$ and $\mathrm{f}$ orbital and filling of electron in $\mathrm{Al}$ does not involve any d or f-orbital. Thus, the Pd is most likely to show innert pair effect.
J and K CET-(2004)
Classification of Elements and Periodicity in Properties
89400
Which group of periodic table contains no metal?
1 $\mathrm{IA}$
2 IIIA
3 VIIA
4 VIII
Explanation:
The group VII A of halogens such as fluorine, chlorine, bromine, iodine etc. The word halogen means salt producing so halogen react with metal to form salt and halogen family has nometals. Group IA and III A contain mostly metals and group VIII contains transition elements which are metals.
AIIMS-1999
Classification of Elements and Periodicity in Properties
89402
Which of the following has the smallest size?
1 $\mathrm{Al}^{3+}$
2 $\mathrm{F}^{-}$
3 $\mathrm{Na}^{+}$
4 $\mathrm{Mg}^{2+}$
Explanation:
The size of cation is small then their neutral atom because it has less electrons while its nuclear charge remains the same. So, the nucleus attracts the electron more towards itself and leads to the decrease in size. $\mathrm{Al}^{3+}$ ion has smallest size. - When an atom losses electrons, it results in the formation of positive ion known as cation. - When an atom gains electrons, it results in the formation of negative ion known as anion.
