D-Blocks Elements - Chapter No 13

Right Answers have been shown below in red color.

1. The elements in which ‘d’ or ‘f’ orbitals are incomplete either in the atomic state or in their common ions are called.

a) Transuranium elements
b) Transition elements
c) Lanthanides
d) Actinides

2. Transition elements have ________. 

a) Four series
b) Two series
c) Three series
d) Five series

3. The incomplete orbital of 1st series of transition elements i.e. Sc(21) to Zn (30) is.

a) 3d
b) 4d
c) 5d
d) 5f

4. In the periodic table the transition elements are placed in the sub-groups.

a) I-A to VIII-A
b) III-A to VIII-A
c) I-B to VIII-B
d) III-B to VIII-B

5. There are about ______ transition elements out of 110 discovered so far.

a) 65
b) 60
c) 55
d) 50

6. The atomic and ionic radii ______ from left to right in the transition series.

a) Increases
b) Decreases
c) Remains same
d) Fluctuates

7. The color of Mnِ+2 in hydrated form is.
a) Green b) Blue c) Light pink d) Yellow

8. The color of Niِ+2 in hydrated form is.

a) Pink
b) Grassy green
c) Yellow
d) Blue

9. Iron oxide is used as a catalyst in the.

a) Constant process
b) Catalytic hydrogenation
c) Ostwald’s process
d) Haber process

10. The substances which are attracted by a magnetic field are called _________ substances.

a) Para magnetic
b) Diamagnetic
c) Ferromagnetic
d) Electromagnetic

10. The substances which are attracted by a magnetic field are called _________ substances.

a) Para magnetic
b) Diamagnetic
c) Ferromagnetic
d) Electromagnetic

11. The substance containing unpaired electrons shows ________  property.

a) Diamagnetic
b) Ferromagnetic
c) Paramagnetic
d) Electromagnetic

12. Iron and cobalt are _______ substances.

a) Ferromagnetic
b) Diamagnetic
c) Paramagnetic
d) Electromagnetic

13. The substances which can be magnetized permanently are called ______ substance.

a) Paramagnetic
b) Ferromagnetic
c) Diamagnetic
d) Actomagnetic

14. The transition elements and their compounds are ___________ in nature.

a) Orthomagnetic
b) Metamagnetic
c) Paramagnetic
d) Electromagnetic

15. A single or unpaired electron behaves like a small _______.

a) Silver
b) Stone
c) Power house
d) Magnet

16. The empty spaces between the atoms of metal inside their crystal lattices are called?

a) Interons
b) Inter spaces
c) Inter ferons
d) Interstices

17. The compounds formed by diffusion of small atoms in the interstices of crystal structures of transition metals are called?

a) Addition compounds
b) Interstitial compounds
c) Organic compounds
d) Complex compounds

18. An atom or ion of transition metals surrounded by oppositely charged ions are neutral molecules is called __________.

a) Complex compounds
b) Ionic compounds
c) Interstitial compounds
d) Organic compounds

19. An ion or neutral molecule surrounding a central atom in complex compounds is called?

a) Coordinator
b) Ligand
c) Extra molecule
d) Heavy io

20. Coordination number of the central atom of complex compounds is the number of __________ attached to the central atom.

a) Ions
b) Cations
c) Ligands
d) Anions

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