Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
AP EAMCET202017 Sep 2020Morning ShiftChemistrys Block ElementsActual

Two metals (A ) and (B ) having similar ionic radii, react with oxygen to give only monoxides and react with nitrogen to give nitrides. Then, (A ) and (B ) respectively are

Options

  1. A( L ) and ( Na )
  2. B( Na ) and ( Ca )
  3. C( Li ) and ( Mg )
  4. D( Na ) and ( Be )

Correct answer

C. ( Li ) and ( Mg )

Step-by-step solution

( Li ⁺ )among group- 1 metals and ( Mg ²⁺ ) of group- 2 metals have similar ionic radii, because they are diagonally present in the periodic table. The stable monoxides (only) of ( Li ) and ( Mg ) are ( Li ₂ O ) and ( MgO ) respectively.

Practice s Block Elements on Quantrex Academy →

More from s Block Elements

Choose a false statement regarding the properties of sodium hydroxide. 2026Which element from following forms superoxide with oxygen? 2026What is the general formula of halide salts of alkali metals if M is a metal atom ? 2026Which from the following metal chlorides does not contain water of crystallisation ? 2026Which of the following compounds is formed when chlorine reacts with dry slake lime Ca(OH) ₂ ? 2026Identify the alkali metal having the smallest atomic size from following. 2026Identify the elements of alkali metals and alkaline earth metals respectively having highest 1st ionization enthalpy. 2026Which alkaline earth metal carbonate decomposes most easily? 2026 Full s Block Elements list All AP EAMCET PYQs