Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
MHT CET202521 Apr 2025Evening ShiftChemistryd and f Block ElementsActual

Which from following is the general formula of compound obtained when lanthanoid ( Ln ) reacts with carbon at elevated temperature?

Options

  1. ALnC
  2. BLnC ₂
  3. CLn ₃ C
  4. DLnC ₃

Correct answer

B. LnC ₂

Step-by-step solution

The reaction of lanthanoids with carbon under elevated temperatures yields ionic carbides characterized by the general formula LnC ₂ , where C ₂²⁻ (acetylide-like) units are present. For instance, lanthanum forms LaC ₂ under these conditions. The correct option is B.

Practice d and f Block Elements on Quantrex Academy →

More from d and f Block Elements

Pick out the correct option Assertion(A): Mercury is not considered as a transition element Reason (R): Mercury is a liquid 2026Which of the following does not correctly represent the order of the property indicated against it? 2026The element with the highest third ionisation enthalpy is: 2026The product and its colour when MnO₂ is fused with KOH in presence of O₂ : 2026The ion that has a spin only magnetic moment of 5.9 BM is: 2026Which one of the following species will impart colour to an aqueous solution? 2026The basic character of transition metal monoxides follows the order: 2026K ₂ Cr ₂ O ₇ on heating with aqueous NaOH gives ------------------------- 2026 Full d and f Block Elements list All MHT CET PYQs