Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main20265 April 2026Morning ShiftChemistryd and f Block ElementsActual

Which of the following is NOT a physical or chemical characteristics of interstitial compounds?

Options

  1. AThey have high melting points, higher than those of pure metals.
  2. BThey are very soft and ionic in nature.
  3. CThey retain metallic conductivity.
  4. DThey are chemically inert and usually non-stoichiometric.

Correct answer

B. They are very soft and ionic in nature.

Step-by-step solution

Interstitial compounds are formed when small atoms like H, C, or N are trapped inside the crystal lattices of transition metals. The principal physical and chemical characteristics of interstitial compounds are: (i) They have high melting points, higher than those of pure metals. (ii) They are very hard, and some borides approach diamond in hardness. (iii) They retain metallic conductivity. (iv) They are chemically inert. (v) They are usually non-stoichiometric. Therefore, the statement that they are very soft and

Practice d and f Block Elements on Quantrex Academy →

More from d and f Block Elements

Given below are two statements: Statement I: The number of pairs among [ Ti ⁴⁺, V ²⁺] , [ V ²⁺, Mn ²⁺] , [ Mn ²⁺, Fe ³⁺] and [ V ²⁺, Cr ²⁺] in which both ions are coloured is 3 . S 2026Given below are two statements for catalytic properties of transition metals. Statement I: First row transition metals which act as catalyst utilise their 3d electrons only for 2026The correct order of first ( _i H₁) and second ( _i H₂) ionisation enthalpy values of Cr and Mn are : A. _i H₁ : Cr > Mn B. _i H₂ : Cr > Mn C. _i H₁ : Mn > Cr D. _i H₂ : Mn > Cr Ch 2026The correct statements among the following are. A. Basic vanadium oxide is used in the manufacture of H ₂ SO ₄ . B. The spin-only magnetic moment value of the transition metal hali 2026Given below are two statements : Statement I: Presence of large number of unpaired electrons in transition metal atoms results in higher enthalpies of their atomisation. Statement 2026A paper dipped in a dil. H₂SO₄ solution of ' X ' upon treatment with SO₂ gas turns into green. The compound ' X ' is : 2026Pairs of elements with the same number of electrons in their respective 4f orbital are [Atomic number. Eu-63, Gd-64, Dy-66, Ho-67, Tm-69, Yb-70, Lu-71, Hf-72] A. (Eu and Gd) B. (Dy 2026Consider |x| is the difference in oxidation states of Mn in highest manganese fluoride and highest manganese oxide. The ions with |x| number of unpaired electrons from the followin 2026 Full d and f Block Elements list All JEE Main PYQs