Download JEE MCQs for JEE Chemistry: The D and F Block Elements
Explore reliable objective questions for The D and F Block Elements tailored for JEE learners. Utilizing these Chemistry multiple-choice formats ensures thorough preparation and strengthens problem-solving speed for upcoming school assessments.
Chapter-wise Objective Questions: The D and F Block Elements
Access the complete set of multiple-choice questions for The D and F Block Elements below. This focused format allows students to isolate specific topics for thorough review and uninterrupted practice alongside official JEE textbooks.
Multiple Choice Questions
(a) H2SO4 is a stronger acid than HCl
(b) HCl is oxidised by KMnO4 to Cl2
(c) H2SO4 is a dibasic acid
(d) The rate is faster in the presence of H2SO4
Show Answer & Explanation
Answer: (b) HCl is oxidised by KMnO4 to Cl2
Explanation:
1. Permanganate would oxidise HCl to chlorine and give wrong titre values.
Teacher's Note:
1. Use dilute sulphuric acid.
(a) CrO3
(b) Cr2O3
(c) CrO5
(d) CrO4 2-
Show Answer & Explanation
Answer: (c) CrO5
Explanation:
1. The blue peroxide CrO5 is formed.
Teacher's Note:
1. Test for H2O2.
(a) 4f and 5f orbitals are equally shielded
(b) d-Block elements show irregular and erratic chemical properties among themselves
(c) La and Lu have partially filled d orbitals and no other partially filled orbitals
(d) The chemistry of various lanthanides is very similar
Show Answer & Explanation
Answer: (a) 4f and 5f orbitals are equally shielded
Explanation:
1. The 5f orbitals are less effectively shielded than the 4f orbitals.
Teacher's Note:
1. Hence actinoids show more variability.
(a) There is less energy difference between 6d and 5f orbitals
(b) The 5f orbitals are more buried than the 4f orbitals
(c) There is similarity in the angular part of the wave function
(d) The actinoids are more reactive
Show Answer & Explanation
Answer: (a) There is less energy difference between 6d and 5f orbitals
Explanation:
1. The 5f, 6d and 7s levels are close in energy.
Teacher's Note:
1. Smaller energy gap.
(a) +3
(b) -2
(c) +2
(d) 0
Show Answer & Explanation
Answer: (d) 0
Explanation:
1. Chromium is +6 in both ions, so it is not a redox reaction.
Teacher's Note:
1. Acid-base interconversion.
(a) Inert pair effect
(b) Screening effect
(c) Lanthanide contraction
(d) Increasing effective nuclear charge
Show Answer & Explanation
Answer: (c) Lanthanide contraction
Explanation:
1. The 4f subshell is filled between the two series and shields poorly.
Teacher's Note:
1. Lanthanide contraction.
(a) Ferrous compounds are more easily hydrolysed than the corresponding ferric compounds
(b) Ferrous oxide is more basic than ferric oxide
(c) Ferrous compounds are relatively more ionic than the corresponding ferric compounds
(d) Ferrous compounds are less volatile than the corresponding ferric compounds
Show Answer & Explanation
Answer: (a) Ferrous compounds are more easily hydrolysed than the corresponding ferric compounds
Explanation:
1. The more highly charged Fe3+ is hydrolysed more easily.
Teacher's Note:
1. Higher charge, more hydrolysis.
(a) Cr
(b) Mn
(c) Fe
(d) Co
Show Answer & Explanation
Answer: (d) Co
Explanation:
1. Co3+/Co2+ has the highest value because Co3+ is a strong oxidant.
Teacher's Note:
1. Mn3+/Mn2+ is also high but lower.
(a) Zn2+
(b) Hg2+
(c) Cu2+
(d) None
Show Answer & Explanation
Answer: (c) Cu2+
Explanation:
1. Cu2+ is reduced to Cu(I) by iodide and by cyanide.
Teacher's Note:
1. Cu(II) is a good oxidant toward I- and CN-.
(a) The nitrate
(b) The bromide
(c) Both
(d) None of the two
Show Answer & Explanation
Answer: (b) The bromide
Explanation:
1. The bromide gives red-brown bromine which colours water; with MnO2 the nitrate gives colourless HNO3.
Teacher's Note:
1. Bromine water is orange.
(a) Its configuration changes from d4 to d3 to achieve half-filled t2g
(b) Cr2+ gains an electron to achieve d5 configuration
(c) Cr2+ gives an electron to achieve d5 configuration
(d) Its configuration changes from d4 to d3 to achieve half-filled d-subshell
Show Answer & Explanation
Answer: (a) Its configuration changes from d4 to d3 to achieve half-filled t2g
Explanation:
1. Cr2+ (d4) is oxidised to Cr3+ (d3) with the stable half-filled t2g set.
Teacher's Note:
1. Cr(III) is stable.
(a) O atom is smaller than F
(b) Oxygen has the ability to form multiple bonds
(c) Mn7+ does not exist
(d) F cannot stabilise higher oxidation states
Show Answer & Explanation
Answer: (b) Oxygen has the ability to form multiple bonds
Explanation:
1. Oxygen can form pi bonds with the metal and stabilise Mn(VII).
Teacher's Note:
1. Multiple bonding.
(a) CrO4- < MoO4- < WO4-
(b) VO2+ < Cr2O7 2- < MnO4-
(c) CrO3 < MnO2 < Fe2O3
(d) Pb4+ < Sn4+ < C4+
Show Answer & Explanation
Answer: (b) VO2+ < Cr2O7 2- < MnO4-
Explanation:
1. Oxidising power increases from V(V) to Cr(VI) to Mn(VII).
Teacher's Note:
1. Higher oxidation state, stronger oxidant.
(a) d10 configuration
(b) Disproportionation
(c) Less charge
(d) Pseudo inert gas configuration
Show Answer & Explanation
Answer: (b) Disproportionation
Explanation:
1. 2Cu+ gives Cu2+ + Cu in water, because of the large hydration enthalpy of Cu2+.
Teacher's Note:
1. Cu+ disproportionates.
Assertion (A): La(OH)3 is more basic than Lu(OH)3
Reason (R): Lanthanum is a d-block element
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Show Answer & Explanation
Answer: (b) Both A and R are true, but R is not the correct explanation of A.
Explanation:
1. The basicity falls from La to Lu because of the decreasing ionic size.
2. The reason is true by itself but does not explain it.
Teacher's Note:
1. Basicity falls across the series.
Assertion (A): Actinides show a much higher range of oxidation states
Reason (R): The energy difference between the 5f and 6d orbitals is large
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Show Answer & Explanation
Answer: (c) A is true, but R is false.
Explanation:
1. The assertion is true.
2. The energy gap is small, so the reason is false.
Teacher's Note:
1. Close 5f and 6d.
Assertion (A): All the lanthanide elements exhibit a common oxidation state of +3 in their compounds
Reason (R): The atoms of the lanthanide elements contain three electrons in their outermost shell
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Show Answer & Explanation
Answer: (c) A is true, but R is false.
Explanation:
1. The assertion is true.
2. They have two electrons in 6s and sometimes one in 5d, and the outer shell does not have three electrons.
Teacher's Note:
1. Reason is wrong.
Assertion (A): K2Cr2O7 is used as a primary standard in volumetric analysis
Reason (R): It has a good solubility in water
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Show Answer & Explanation
Answer: (c) A is true, but R is false.
Explanation:
1. The assertion is true because it is not hygroscopic and is easily purified.
2. The reason is false; its solubility is moderate and is not the reason.
Teacher's Note:
1. Primary standard properties.
Assertion (A): A change in colour of acidified potassium dichromate solution by breath is used to test drunk drivers
Reason (R): The change in colour is due to the complexation of alcohol with potassium dichromate
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Show Answer & Explanation
Answer: (c) A is true, but R is false.
Explanation:
1. The assertion is true.
2. The colour changes because alcohol is oxidised and Cr(VI) is reduced to Cr(III), not because of complexation.
Teacher's Note:
1. Orange to green.
Assertion (A): MnO2 is antiferromagnetic in nature
Reason (R): In MnO2 an equal number of domains are aligned with parallel and antiparallel spin
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Show Answer & Explanation
Answer: (a) Both A and R are true, and R is the correct explanation of A.
Explanation:
1. Equal opposed domains give an antiferromagnetic material.
Teacher's Note:
1. Spins cancel.
Assertion (A): La2O3 is basic in nature
Reason (R): La in aqueous solution gives La(OH)3
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Show Answer & Explanation
Answer: (a) Both A and R are true, and R is the correct explanation of A.
Explanation:
1. The oxide gives the strongly basic hydroxide with water.
Teacher's Note:
1. La(OH)3 is a base.
Assertion (A): FeCl3 does not affect the iodometric titration of CuSO4 solution
Reason (R): FeI3 is formed
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Show Answer & Explanation
Answer: (d) A is false, but R is true.
Explanation:
1. Fe3+ oxidises iodide to iodine, so it interferes.
2. FeI3 is not formed, since Fe3+ oxidises I-.
Teacher's Note:
1. Both false.
Assertion (A): Actinides can possess the +4 oxidation state more easily than lanthanides
Reason (R): 4f, 5d and 6s have almost the same energy levels
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Show Answer & Explanation
Answer: (b) Both A and R are true, but R is not the correct explanation of A.
Explanation:
1. The 5f, 6d and 7s levels are the ones of comparable energy for the actinides, and this reason does not explain the assertion.
Teacher's Note:
1. Wrong sublevels quoted.
Assertion (A): UF6 is more covalent than UF4
Reason (R): Fluorine is smaller in size
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Show Answer & Explanation
Answer: (b) Both A and R are true, but R is not the correct explanation of A.
Explanation:
1. Higher oxidation state increases covalent character and polarisation.
2. The small fluorine size is true but is not the reason.
Teacher's Note:
1. Higher charge, more covalent.
Free study material for Chemistry
The D and F Block Elements Objective Questions & Solutions for JEE Chemistry
Download Multiple Choice Questions: The D and F Block Elements (JEE Chemistry)
Test your conceptual understanding of The D and F Block Elements with these targeted multiple-choice questions. Designed in alignment with the latest JEE curriculum for JEE Chemistry, these problem sets build accuracy and prepare students for objective exams.
Concept Clarification for The D and F Block Elements
Cross-reference your completed choices with comprehensive NCERT solutions for JEE Chemistry to ensure absolute clarity across all sub-topics in this chapter.
Additional Study Resources for JEE Chemistry
Wrap up your chapter revision by testing your knowledge against standard question formats. Everything on our platform is provided free of charge.
FAQs
You can get most exhaustive JEE Chemistry The D and F Block Elements MCQs Set 09 for free on StudiesToday.com. These MCQs for JEE Chemistry are updated for the 2026-27 academic session as per JEE examination standards.
Yes, our JEE Chemistry The D and F Block Elements MCQs Set 09 include the latest type of questions, such as Assertion-Reasoning and Case-based MCQs. 50% of the JEE paper is now competency-based.
By solving our JEE Chemistry The D and F Block Elements MCQs Set 09, JEE students can improve their accuracy and speed which is important as objective questions provide a chance to secure 100% marks in the Chemistry.
Yes, Chemistry MCQs for JEE have answer key and brief explanations to help students understand logic behind the correct option as its important for 2026 competency-focused JEE exams.
Yes, you can also access online interactive tests for JEE Chemistry The D and F Block Elements MCQs Set 09 on StudiesToday.com as they provide instant answers and score to help you track your progress in Chemistry.