Engineer & Medical

Classification of Element question bank (Chemistry)

Practice 863 free Engineer & Medical Chemistry - Classification of Element questions with answers and step-by-step solutions.

Q1.

The electronegativity of a group 13 element 'E' is same as that of Ge (on Pauling scale and upto one decimal point). The CORRECT statements about $E^{3+}$ are
A. It can act as a reducing agent.
B. It can act as an oxidizing agent.
C. $E^{3+}$ is more stable than $E^+$.
D. The standard electrode potential value for $E^{3+}/E$ is positive.
Choose the correct answer from the options given below:

(A)
A and C Only
(B)
B and C Only
(C)
B and D Only
(D)
A and D Only
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Q2.

Given below are two statements:
Statement I: Among $Zn, Mn, Sc$ and $Cu$, the energy required to remove the third valence electron is highest for $Zn$ and lowest for $Sc$.
Statement II: The correct order of the following complexes in terms of CFSE is $[Co(H_2 O)_6]^{2+} \lt [Co(H_2 O)_6]^{3+} \lt [Co(en)_3]^{3+}$.
In the light of the above statements, choose the correct answer from the options given below:

(A)
Both Statement I and Statement II are true
(B)
Both Statement I and Statement II are false
(C)
Statement I is true but Statement II is false
(D)
Statement I is false but Statement II is true
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