Q1.Which one of the following is an example of non – typical transition elements?
Answer : Option AExplaination / Solution:
Zn, Cd and Hg are not considered as transition elements because they donot have incompletely filled d orbital in its ground state or stable oxidation state
Q2.Zr and Hf have almost equal atomic and ionic radii because
Answer : Option AExplaination / Solution:
Due to presence of Lanthanide series in which electron enter f orbital which have poor shielding effect size of 5d series and 4d series doesnot change much . this is known as lanthanide contraction.
Q7.Mohr’s salt is a better volumetric agent then ferrous sulphate because
Answer : Option BExplaination / Solution:
Mohr’s salt is a better volumetric agent then ferrous sulphate because
it is less readily oxidised in the solid state. Also Mohr salt is more
stable than FeSO4.