36 Questions
What is the reason for the decrease in atomic radii across the 3d series?
Poor shielding by d electrons, resulting in increased attraction
What is the effect of lanthanoid contraction on the atomic radii of the 4d and 5d series?
The radius of the 4d series is similar to the radius of the 5d series
Which of the following elements has the lowest boiling point?
Hg
What is the reason for the increase in atomic radii from Ni to Cu to Zn?
Repulsion between electrons dominates attraction
What is the effect of the filling of 4f orbitals on the atomic radii of the 5d series?
Decrease in atomic radii
What is the reason for the gradual decrease in atomic radii from Sc to Mn?
Increase in nuclear charge and effective nuclear charge
What is the primary reason for the lanthanoid contraction?
Increase in nuclear charge and attraction
Which of the following statements is true about the trends in atomic radii in the lanthanoid series?
The atomic radii decrease gradually from Ti to Hf
What is the effect of the shielding power of orbitals on the atomic radii?
It increases the atomic radii
Which of the following elements has the smallest atomic radius?
Ti
What is the primary reason for the actinoid contraction?
Increase in nuclear charge
What is the trend in ionization enthalpy from left to right in a period?
It increases gradually
What is the effect of lanthanoid contraction on the physical and chemical properties of 4d and 5d elements?
It makes them have very similar physical and chemical properties
Which of the following statements is true about the electron configuration of actinoids?
5f orbitals extend in space more than 4f orbitals
What is the trend in atomic radii across the actinoid series?
Gradual decrease in atomic radii
Why do actinoids resemble lanthanoids in their oxidation states?
Due to similar electron configurations
What is the result of the poor shielding effect of 5f orbitals in actinoids?
Increased attraction between the nucleus and electrons
Which of the following statements is false about the oxidation states of actinoids?
Actinoids have more compounds in +4 state than in +3 state
What is the colour of the ion Mn2+?
Light pink
What is the reason for the formation of coloured ions?
Due to the excitation of an electron from a lower energy d orbital to a higher energy d-orbital
What is an example of a complex compound?
[Fe(CN)6]3–
What is the name of the test that forms a brown ring at the junction of two layers?
Brown Ring Test
Why do transition metals show catalytic property?
All of the above
Which of the following ions is known to have a yellow colour?
Fe3+
What is the solubility of copper oxide (CuO) in water?
Insoluble
What is the product of the reaction between copper carbonate and dilute sulphuric acid?
CuSO4
What is the use of blue vitriol (CuSO4) in a specific industry?
All of the above
What is the reaction product when iron wire reacts with dry chlorine gas?
FeCl3
What is the characteristic of the solution of ferric chloride (FeCl3) in water?
Acidic
What is the crystalline form of green vitriol (FeSO4)?
FeSO4.7H2O
What is the reason why most actinoid metals are less affected by nitric acid?
Formation of a protective oxide layer
Which of the following is a use of d and f block elements?
Alloying metals for iron and steel production
What is the role of TiO2 in dry cell batteries?
It is used as a white pigment
Which catalyst is used in the contact process?
V2O5
What is the role of nickel in the Haber process?
It acts as a catalyst
Which process uses a nickel complex as a catalyst?
Polymerisation of alkynes and benzene
Test your understanding of the boiling points of transition elements, including zinc, cadmium, and mercury. Learn about the trends in atomic radii, ionization enthalpy, and metallic bonding in the 3d series. Evaluate your knowledge of the factors affecting the boiling points of these elements.
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