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Alk aline earth metal (A), belongs to 3rd period reacts with oxygen and nitrogen to form compound (B) and (C) respectively. It undergo metal displacement reaction with AgNO_3 solution to form compound (D).

Answer» <html><body><p></p>Solution :(i) An alkaline earth (A) metal belongs to third period is magnesium (Mg) <br/>(ii) Magnesium <a href="https://interviewquestions.tuteehub.com/tag/reacts-1178303" style="font-weight:bold;" target="_blank" title="Click to know more about REACTS">REACTS</a> with oxygen to form magnesium oxide (MgO) (B) <br/>`2Mg +O_(2)tounderset(Magnesium oxide)(2MgO_(2))` <br/>(iii) Magnesium reacts with <a href="https://interviewquestions.tuteehub.com/tag/nitrogen-1118291" style="font-weight:bold;" target="_blank" title="Click to know more about NITROGEN">NITROGEN</a> to form magnesium nitride `Mg_(3)N_(2)(C)` <br/>`3Mg+N_(2)O_(2)tounderset("Magnesium nitride")(Mg_(3)O)` <br/>(iv) Magnesium <a href="https://interviewquestions.tuteehub.com/tag/undergoes-1436539" style="font-weight:bold;" target="_blank" title="Click to know more about UNDERGOES">UNDERGOES</a> metal displacement reaction with `AgNO_(3)` solution to form magnesium nitrate `Mg(NO_(3))_(2) (D)` <br/>`Mg+2AgNO_(3) tounderset("Magnesium nitrate") (Mg(NO_(3))_(2) +)<a href="https://interviewquestions.tuteehub.com/tag/2ag-300272" style="font-weight:bold;" target="_blank" title="Click to know more about 2AG">2AG</a>` <br/><img src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/FM_CHE_XI_V01_C05_E01_035_S01.png" width="80%"/></body></html>


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