Single Choice

The maximum and minimum m. p. of $$1^{st}$$ transition and $$2^{nd}$$ transition series respectively are obtained with:

A$$Cr$$ and $$Zn$$
B$$Cr$$ and $$Cd$$
Correct Answer
C$$Cr$$ and $$Hg$$
D$$Mo$$ and $$Cd$$

Solution

In the first transition series, chromium has the maximum number of unpaired electrons (5 unpaired electrons).
It has the strongest metallic bonds and maximum melting point.
In the second transition series, cadmium has no unpaired electrons.
Hence, it has a minimum melting point.
hence B is correct answer

SIMILAR QUESTIONS

d - block and f - block Elements

Volatile metals like $$Zn, Cd$$ and $$Hg$$ are purified by :

d - block and f - block Elements

Which of the following group elements exhibits high melting and boiling points?

d - block and f - block Elements

Transition elements have high MP & BP due to:

d - block and f - block Elements

These questions consists of two statements each, printed as assertion and reason, while answering these questions you are required to choose any one of the following responses. Assertion : Melting point of Mn is more than that of Fe. Reason : Mn has higher number of unpaired e than Fe in atomic state.

d - block and f - block Elements

The elements of $$3d$$ transition series are given as : $$Sc\ Ti\ V\ Cr\ Mn\ Fe\ Co\ Ni\ Cu\ Zn$$ Which element has the highest melting point and why?

d - block and f - block Elements

In the following transition elements, the lowest M.P. and B.P. is exhibited by

d - block and f - block Elements

In first transition series, the melting point of Mn is low because

d - block and f - block Elements

Which of the following transitional metal has lowest boiling point (B.P.)?

d - block and f - block Elements

Transition elements show high melting points why?

d - block and f - block Elements

Transition elements show high melting points why?

Contact Details