Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEETChemistryd and f Block Elements

Assertion: In general, transition metals have high melting points. Reason: More number of electrons from ' n - 1 d ' and ' ns ' are involved in interatomic metallic bonding. The correct option among the following is

Options

  1. AAssertion is true, Reason is true and Reason is the correct explanation for Assertion
  2. BAssertion is true, Reason is true but Reason is not the correct explanation for Assertion
  3. CAssertion is true but Reason is false
  4. DAssertion is false but Reason is true

Correct answer

A. Assertion is true, Reason is true and Reason is the correct explanation for Assertion

Step-by-step solution

The transition metals (with the exception of Zn ,   Cd   and   Hg ) are very much hard and have low volatility. Their melting and boiling points are high.The high melting points of these metals are attributed to the involvement of greater number of electrons from   ( n - 1 ) d in addition to the ns electrons in the interatomic metallic bonding. In any row the melting points of these metals rise to a maximum at d 5 .

Practice d and f Block Elements on Quantrex Academy →

More from d and f Block Elements

Although +3 oxidation state is most common in lanthanoids, cerium still shows +4 oxidation state because : 2026The lanthanide ion having four unpaired electrons is (Given : Atomic numbers of Ce =58 , Nd =60 , Tb =65 and Ho =67 ) 2026The green paramagnetic species formed by heating KMn O₄ at 513 K is 2026The calculated 'spin-only' magnetic moment of Ti ²⁺ (3d^2) is : 2026Match List I with List II : List I (Transition metal/compound/complex) List II (Catalytic Role) A. V ₂ O ₅ I. Preparation of ammonia from N ₂/ H ₂ mixture B. Fe II. Polymerisation 2026Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R . Assertion A : Generally, 3d transition metals have high melting points. Reas 2026Given below are two statements : Statement I : Ferromagnetism is considered as an extreme form of paramagnetism. Statement II : The number of unpaired electrons in a Cr ²⁺ ion ( Z 2025Which of the following set of ions act as oxidising agents? 2024 Full d and f Block Elements list All NEET PYQs