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The D-And-f-Block Elements

Question
CBSEENCH12011029
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When copper is heated with conc. HNO3 it produces

  • Cu(NO3)2 and NO

  • Cu(NO3)2, NO and NO2

  • Cu(NO3)2 and N2O

  • Cu(NO3)2 and NO2

Solution

D.

Cu(NO3)2 and NO2

Nitric acid acts as an oxidising agent while reacting with copper.
i) when copper reacts with dilute nitric acid it forms,
3Cu + 4HNO3(dilute) --> 3Cu(NO3)2 +2NO +4H2O
ii) When copper reacts with concentrated nitric acid it forms,
Cu +4HNO3(conc.) ---> Cu(NO3)2 +NO2 +2H2O

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

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?

Write the general electronic configuration of d-block elements.

Why do some exceptions to the general electronic configuration of d-block elements exists?

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