First and second transition series

The high melting point and boiling point of transition elements is due to………..

• metallic bonding

• covalent bonding

• both metallic and covalent bonding

• none of these

which of the following d block element have very low melting point?

• Cr, Cu, Hg

• Zn, Sc, Hg

• Zn, Cd, Hg

• Cr, Cu, Hg

Arrange the melting point of manganese, magnesium and potassium in increasing order.

• K<Mg<Mn

• Mn<K<Mg

• Mn<Mg<K

• Mg<Mn<K

Tags

NGSS.MS-PS1-4

1. The electron configuration of iron in FeO₄^2- ion is

• 1s² 2s² 2p⁶ 3s² 3p⁶ 3d²

• 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁶

• 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁵ 4s¹

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²

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

First transition series is called as ….

• 4d series

• 3d series

• 5d series

• None of these

…….. ..has exceptional electronic configuration.

• Scandium and Copper

• Chromium and Copper

• Chromium and Nickel

• Chromium and Zinc

first transition series consist of elements .....

• from Scandium to Copper

• from Scandium to Zinc

• from Chromium to Copper

• from Chromium to Zinc

Electronic Configuration of Cadmium is ….

• [Kr] 5s¹ 4d¹⁰

• [Kr] 5s² 4d¹⁰

• [Kr] 5s⁰ 4d¹⁰

• [Kr] 5s² 4d⁹

Third transition series consist of elements Lanthanum and from…….

• Scandium to Zinc

• Yttrium to Cadmium

• Hafnium to Mercury

• Yttrium to Mercury