Question

The number of unpaired electrons in Gadolinium $$\left[ {Z = 64} \right]$$ is

A. 3

B. 8

C. 6

D. 2

Answer : 8

Solution :
$$Gd\left( {64} \right) = \left[ {Xe} \right]4{f^7}5{d^1}6{s^2}$$
∴ No. of unpaired electrons $$=8$$

Releted MCQ Question on
Inorganic Chemistry >> D and F Block Elements

Releted Question 1

When same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide, the ratio of volume of hydrogen evolved is

A. $$1:1$$

B. $$1:2$$

C. $$2:1$$

D. $$9:4$$

Releted Question 2

Which of the following is the weakest base

A. $$NaOH$$

B. $$Ca{\left( {OH} \right)_2}$$

C. $$KOH$$

D. $$Zn{\left( {OH} \right)_2}$$

Releted Question 3

One of the constituent of German silver is

A. $$Ag$$

B. $$Cu$$

C. $$Mg$$

D. $$Al$$

Releted Question 4

Which of the following dissolve in hot conc.$$NaOH$$ solution

A. $$Fe$$

B. $$Zn$$

C. $$Cu$$

D. $$Ag$$

Practice More Releted MCQ Question on
D and F Block Elements

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Physical Chemistry Some Basic Concepts in Chemistry Stoichiometry States of Matter Solid, Liquid and Gas Atomic Structure Chemical Thermodynamics Solutions Solid State Surface Chemistry Chemical Equilibrium Ionic Equilibrium Chemical Kinetics Redox Reaction Electrochemistry Nuclear Chemistry

Inorganic Chemistry Chemical Bonding and Molecular Structure Ores and Metallurgy Classification of Elements and Periodicity in Properties Hydrogen S - Block Elements P - Block Elements D and F Block Elements Co - ordination Compounds Qualitative Analysis Preparation and Properties of Compounds Environmental Chemistry

Organic Chemistry General Organic Chemistry Isomerism Purification and Characterisation of Organic Compounds Hydrocarbons (Alkane, Alkene and Alkyne)Aromatic hydrocarbon Electrophilic Aromatic Substitution (Haloalkanes and Haloarenes)Alkyl and Aryl Halide Reactions on Benzene Alcohol, Phenol and Ether Aldehyde and Ketone Carboxylic Acid Organic Compounds Containing Nitrogen Name Reactions Polymers Biomolecules Chemistry in Everyday Life Practical Organic Chemistry