Which element from group V gives most basic compound with hydrogen?
Nitrogen
Bismuth
Arsenic
Phosphorus
A.
Nitrogen
Al the hydrides of group V elements possess a lone pair of electrons on the central atom and thus behaves as Lewis bases. The basic character, however, decreases as we move down the group from NH3 to BiH3.
Point out in which of the following properties oxygen differs from the rest of the members of its family (Group-VIA)?
High value of ionisation energies
Oxidation states (2,4,6)
Polymorphism
Formation of hydrides
Which of the following properties increases on going down from F to I in group VII-A of the periodic table?
Electronegativity
Volatile nature
Ionic radius
Oxidising power
Transitional elements are mostly
diamagnetic
paramagnetic
neither diamagnaetic nor paramagnetic
diamagentic and paramagnetic both
Which of the following radicals will not be precipitated by passing H2S in concentrated acid solution?
Copper
Antimony
Arsenic
Cadmium
In which of the following solvents, AgBr will have the highest solubility?
10-3 M NaBr
10-3 M NH4OH
Pure water
10-3 M HBr
Which transition element of the following outermost electronic configuration shows the highest oxidation state?
3d3, 4s2
3d5, 4s1
3d5, 4s2
3d6, 4s2