Correct order of first IP among following elements Be, B, C, N, O is
Correct order of first IP among following elements Be, B, C, N, O is
Options
(a) B< Be < C
Classification of Elements and Periodicity
A trend common to both for group I and VII elements in the periodic table
A trend common to both for group I and VII elements in the periodic table as atomic number increases is
Options
(a) atomic radius increases (b) oxidising power increases (c) reactivity with water […]
Which of the following pairs show reverse properties on moving along
Which of the following pairs show reverse properties on moving along a period from left to right and from top to down in a group?
Options
(a) Nuclear charge and electron affinity (b) […]
One of the characteristic properties of non-metals is that they
One of the characteristic properties of non-metals is that they
Options
(a) Are reducing agents (b) Form basic oxides (c) Form cations by electron gain (d) Are electro negative
Correct Answer:
Are reducing […]
The smallest among the following ion is
The smallest among the following ion is
Options
(a) Na⁺ (b) Mg²⁺ (c) Ba²⁺ (d) Al³⁺
Correct Answer:
Al³⁺
Explanation:
The size of an species decreases with increasing nuclear charge became the attraction […]
The stability of +1 oxidation state increases in the sequence:
The stability of +1 oxidation state increases in the sequence:
Options
(a) Tl < In < Ga < Al (b) In < Tl < Ga < Al (c) Ga < In < Al […]
Be resembles much with
Be resembles much with
Options
(a) Li (b) Al (c) Zn (d) Ra
Correct Answer:
Al
Explanation:
Be resembles much with Al, due to diagonal relationship.
When a neutral atom is converted into a cation, there is
When a neutral atom is converted into a cation, there is
Options
(a) decrease in the atomic number (b) an increase in the atomic number (c) an increase in size (d) a decrease […]
The first ionization potentials (eV) of Be and B respectively are
The first ionization potentials (eV) of Be and B respectively are
Options
(a) 8.29, 9.32 (b) 9.32, 9.32 (c) 8.29, 8.29 (d) 9.32, 8.29
Correct Answer:
9.32, 8.29
Explanation:
First ionisation potential of […]
Which pair of atomic numbers represents s-block elements?
Which pair of atomic numbers represents s-block elements?
Options
(a) 3,12 (b) 6,12 (c) 7,15 (d) 9,17
Correct Answer:
3,12
Explanation:
Last electron goes to s-subshell.