d & f block Elements-I Chemistry Test Series For NEET-2020

Test Preparation on d & f block Elements-I-Chemistry Test Series For NEET-2020

1.

1A
2B
3C
4D

2.

Highest (+7) oxidation state is shown by

1Co
2Cr
3V
4Mn

3.

Mercury is the only metal which is liquid at 0^oC . This is due
to its

1Very high ionisation energy and weak metallic bond
2Low ionisation potential
3High atomic weight
4High vapour pressure

Very high ionisation energy and weak metallic bond.

4.

A transition element X has a configuration [Ar]3d⁴ in its + 3
oxidation state. Its atomic number is

125
226
322
419

Number of electrons in excited state
X⁺³ = 18 + 4 = 22
Number of electrons in ground state
X = 22⁺³ = 25 .

5.

The lanthanide contraction is responsible for the fact that

1Zr and Y have about the same radius
2Zr and Nb have similar oxidation state
3Zr and Hf have about the same radius
4Zr and Zn have the same oxidation state

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