Read the following passage and answer the next five questions based on it.
Sc Ti V Cr Mn Fe
Co Ni Cu Zn
Y Zr Nb Mo Tc Ru
Rh Pd Ag Cd
La Hf Ta W Re Os
Ir Pt Hg
In any transition series, as we move from left to right the d-orbitals are progressively filled and their properties vary accordingly.
Ce Pr Nd Pm Sm
Eu Gd Tb Dy Ho
Er Yb Lu Cm Bk
Tm
Th Pa U Np Pu Am
Cf Es Fm Md No Lr
The above are the two series of f-block elements in which the chemical properties won't change much. The 5f-series elements are radioactive in nature and mostly are artificially synthesized in laboratories and thus much is not known about their chemical properties.
Identify the incorrect statement.
Zr and Hf due to Lanthanoid contraction have similar size and shows similar properties but nuclear properties involve electric charge, mass etc., Zr and Hf have different atomic number and mass number. Therefore, do not show identical nuclear properties.
In general, ionization potential (both 1st and 2nd) increases from left to right across the period due to increase in effective nuclear charge. On this basis, the second IP values should exhibit the trend: Mn > Cr > V > Ti, but the actual observed order is: Cr > Mn > V > Ti
In transition element series, colour is observed due to d-d transition of d orbital electrons so compounds with same no. of unpair electron will show same colour.
Both
have one unpaired electron in the d-orbital and thus exhibit same colour.
Mn shows +7 highest oxidation state
English
50 Questions
200 Marks
45 Mins EnglishIdentify the incorrect statement.
for which the same reaction will be spontaneous at the same temperature is
from pressure of 20 atmosphere to 10 atmosphere is:
for one mole of ideal gas?
