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The D-And-f-Block Elements

Question
CBSEENCH12011257
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Which of the statements given below is incorrect?

  • Cl2O7 is an anhydride of perchloric acid

  • O3molecule is bent

  • ONF is isoelectronic with NO2

  • OF2 is an oxide of fluorine

Solution

D.

OF2 is an oxide of fluorine

Cl2O7 is an anhydride of perchloric acid
2 HClO subscript 4 space rightwards arrow from negative straight H subscript 2 straight O to increment of space Cl subscript 2 straight O subscript 7
The Shape of O3 molecule is bent.

c) Number of electrons in ONF = 24
Number of electrons in NO2 = 24
therefore, ONF and NO2 both are isoelectronic.
d) OF2 is a fluoride of oxygen because electronegativity of fluorine is more than that of oxygen 
OF2 = oxygen difluoride

Some More Questions From The d-And-f-Block Elements Chapter

Explain why Cu+ ion is not stable in aqueous solutions?

Actinoid contraction is greater from element to element than lanthanoid contraction. Why?

On what ground can you say that scandium (Z = 21) is a transition element but zinc (Z = 30) is not?

The outer electronic configuration of copper is 3d10 4s1, yet it is considered transition element. Why?

Why the melting points of transition elements are high?

Why Zn, Cd and Hg are not regarded as transition elements?

Name the first element of 3rd transition series.

Though copper, silver and gold have completely filled sets of d-orbitals yet they are considered as transition metals. Why?

Why are transition elements so named?

Why are transition elements known as d-block elements?

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