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WorksheetsThe d-block elements - Colour
Total questions: 10
Worksheet time: 8mins
Transition elements shows variable oxidation states .
True
False
Oxidation state of first transition series elements are related to their.....
melting point and boiling point
Reactivity and Size of their atoms
electronic configuration
Ionisation energy and Heat of sublimation
Transition elements show variable oxidation states because……….
the energy difference between (n-1)d and ns orbital is very large and the electrons from both these orbitals are used for bonding
the energy difference between (n-1)d and ns orbital is very large and the electrons from both these orbitals are not used for bonding
the energy difference between (n-1)d and ns orbital is very small and the electrons from both these orbitals are not used for bonding
the energy difference between (n-1)d and ns orbital is very small and the electrons from both these orbitals are used for bonding
The stable oxidation state of scandium is...
+1
+2
+3
+4
From scandium to manganese the lower Oxidation state is given by ……..
the number of electrons in the outer (n-1)d subshell
the number of electrons in the outer s- subshell
The sum of outer s and d electrons
None of these
From scandium to manganese the higher Oxidation state is given by ……..
the number of electrons in the outer (n-1)d subshell
the number of electrons in the outer s- subshell
The sum of outer s and d electrons
None of these
Transition elements have a tendency to remain Noble for unreactive because…..
they have variable oxidation states
their melting point, ionization energy and heat of sublimation remains constant throughout the series
they have low melting point, ionization energy and heat of sublimation
they have high melting point, ionization energy and heat of sublimation
The reactivity of transition elements goes on….
decreasing across the series
increasing across the series
remains constant throughout the series
none of these
The colour of a transition metal ions is due to….
Their high ionization energy
Their low reactivity
High melting point and boiling point
d-d electron excitation
The transition metal ions which have completely filled d-orbitals are ……..
Coloured
Colourless
Both coloured and colourless
None of these
