Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main 20199 AprilMorning Shift
Exam
JEE Main
Year
2019
Date
9 April
Shift
Morning Shift
Subject
Chemistry
Chapter
s Block Elements

JEE Main 2019 · 9 April · Morning Shift · Chemistry · s Block Elements

Magnesium powder burns in air to give

Magnesium powder burns in air to give

Options

  1. AMgOandMg3N2MgOandM{g}_{3}{N}_{2}.
  2. BMgOonlyMgOonly.
  3. CMg(NO3)2andMg3N2Mg{\left(N{O}_{3}\right)}_{2}andM{g}_{3}{N}_{2}.
  4. DMgOandMg(NO3)2MgOandMg{\left(N{O}_{3}\right)}_{2}.

Correct answer

A. MgOandMg3N2MgOandM{g}_{3}{N}_{2}.

Step-by-step solution

N2{N}_{2} and O2{O}_{2} are present in the air as the main constituent, so the following reaction takes place:


Mg+O2→MgO,Mg+N2→Mg3N2Mg + {O}_{2} \to MgO, Mg + {N}_{2} \to M{g}_{3}{N}_{2} will form.

Practice s Block Elements on Quantrex Academy →

More from s Block Elements

First and second ionization enthalpies of lithium are 520 kJ mol ^ -1 and 7297 kJ mol ^… JEE Main 2026The correct set that contains all kinds (basic, acidic, amphoteric and neutral) of oxides… JEE Main 2026Given below are two statements: One is labelled as Assertion A and the other is labelled… JEE Main 2023Be ( OH ) _ 2 reacts with Sr ( OH ) _ 2 to yield an ionic salt. Choose the incorrect… JEE Main 2023In the given reaction cycle X, Y and Z respectively are JEE Main 2023The density of alkali metals is in the order JEE Main 2023Alkali metal from the following with least melting point is JEE Main 2023Mg ( NO _ 3 ) _ 2 . XH _ 2 O and Ba ( NO _ 3 ) _ 2 . YH _ 2 O , represent formula of the… JEE Main 2023 Full s Block Elements list All JEE Main PYQs