d- and f-Block Elements — concept-first solved example
A representative d- and f-Block Elements problem gives data and asks for the conclusion. What should be done first?
Method: identify the active concept from Electronic configuration or Oxidation states, then check conditions before using a formula or reaction memory. This is a newly written example, not a copied source question.
d- and f-Block Elements — JEE Advanced trap example
A multi-condition d- and f-Block Elements problem seems direct, but one phrase changes the result.
Method: separate the chemical condition from arithmetic. For example, medium, reagent, temperature, concentration, spin state, resonance or limiting reagent can change the answer even when the formula looks familiar.
d- and f-Block Elements — revision example
Choose the safer solving habit for d- and f-Block Elements.
Use this order: read the condition, name the subtopic, write the governing rule, calculate or compare, then check exceptions. This produces fewer negative marks in both JEE Main and Advanced.
Original solved drill 1: Electronic configuration
A JEE-style question asks you to apply Electronic configuration inside d- and f-Block Elements.
Solution path: identify Electronic configuration, write the relevant condition, eliminate impossible options, and then calculate or compare. This solved drill is newly written to match the topic pattern without reproducing any source wording.
Original solved drill 2: Oxidation states
A JEE-style question asks you to apply Oxidation states inside d- and f-Block Elements.
Solution path: identify Oxidation states, write the relevant condition, eliminate impossible options, and then calculate or compare. This solved drill is newly written to match the topic pattern without reproducing any source wording.
Original solved drill 3: Colour
A JEE-style question asks you to apply Colour inside d- and f-Block Elements.
Solution path: identify Colour, write the relevant condition, eliminate impossible options, and then calculate or compare. This solved drill is newly written to match the topic pattern without reproducing any source wording.
Original solved drill 4: Magnetism
A JEE-style question asks you to apply Magnetism inside d- and f-Block Elements.
Solution path: identify Magnetism, write the relevant condition, eliminate impossible options, and then calculate or compare. This solved drill is newly written to match the topic pattern without reproducing any source wording.
Original solved drill 5: Catalytic properties
A JEE-style question asks you to apply Catalytic properties inside d- and f-Block Elements.
Solution path: identify Catalytic properties, write the relevant condition, eliminate impossible options, and then calculate or compare. This solved drill is newly written to match the topic pattern without reproducing any source wording.
Original solved drill 6: Lanthanoid contraction
A JEE-style question asks you to apply Lanthanoid contraction inside d- and f-Block Elements.
Solution path: identify Lanthanoid contraction, write the relevant condition, eliminate impossible options, and then calculate or compare. This solved drill is newly written to match the topic pattern without reproducing any source wording.