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Important Questions on The d- and f-Block Elements

EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table
Which of the following statements is incorrect for pair of elements Zr - Hf?
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table
What is work function?
HARD
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table
Explain the menstrual cycle in human females.
MEDIUM
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table
What is photoelectric effect?
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table
Write down the electronic configuration of Pm3+.
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table
The pair that has similar atomic radii is:
MEDIUM
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table

If the light of wavelength 412.5 nm is incident on each of the metals given below, which ones will show photoelectric emission and why?

Metal Work Function(eV)
Na 1.92 eV
K 2.15 eV
Ca 3.20 eV
Mo 4.17 eV

 

HARD
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table
When photon of energy 4.0eV strikes the surface of a metal A, the ejected photoelectrons have maximum kinetic energy TAeV and de-Broglie wavelength λA. The maximum kinetic energy of photoelectrons liberated from another metal B by photon of energy 4.50eV is TB=TA-1.5eV. If the de-Broglie wavelength of these photoelectrons λB=2λA, then the work function of metal B is:
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table
What are the different oxidation states exhibited by lanthanoids?
MEDIUM
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table
Why europium (II) is more stable than Cerium (II)?
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table
Account for the following: Zn, Cd, Hg are considered as d-block elements but not as transition elements.
 
MEDIUM
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table
In which block 106th element belongs
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table
General electronic configuration of transition metals is
MEDIUM
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table
How many d-block elements are present in modern periodic table? 40/ 62/ 118
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table
Generally transition elements form coloured salts due to the presence of unpaired electrons. Which of the following compounds will be coloured in solid state? 
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table
What are transition elements?
MEDIUM
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table
Explain why Zn is not considered as transition element?
MEDIUM
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table
Explain why any metal shows the highest oxidation state only in oxides and fluorides?
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table
The second element in third transitional series is
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table
What are the characteristics of the transition elements and why are they called transition elements? Which of the d-block elements may not be regarded as the transition elements?