Assertion : Magnetic moment of Dy is the highest among the lanthanoids.
Reason : Orbital motion contributes magnetic moment.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Reason of passively of iron is :
Fe2O3
Fe3O4
FeO
Fe2O4 . 3H2O
C.
FeO
When iron makes an oxide FeO , it makes the iron passive .
What is the general outer electronic configuration of the coinage metals ?
ns2 np6
(n-1)d10 ns1
(n-1)d10 ns2
(n-1)d9 ns2
Assertion : for Mn3+/Mn2+ is more positive than Cr3+/Cr3+
Reason : The third ionization energy of Mn is larger than that of Cr.
If both assertion and reason are true and reason is the correct explanation of the assertion.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
If assertion is true, but reason is false.
Both assertion and reason are false statements.
Assertion : K2Cr2O7 is used as primary standard in volumetric analysis.
Reason : It has a good solubility in water.
If both assertion and reason are true and reason is the correct explanation of the assertion.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
If assertion is true, but reason is false.
Both assertion and reason are false statements.