What happens when:
(i) magnesium is heated with water.
(ii) magnesium is heated in an atmosphere of carbon dioxide,
(iii) magnesium is treated with dilute sulphuric acid and
(iv) magnesium is treated with nitrogen?

Solution

(i) Magnesium reacts with boiling water to form magnesium hydroxide and hydrogen.
$Mg left parenthesis straight s right parenthesis space plus space 2 straight H subscript 2 straight O left parenthesis straight l right parenthesis space rightwards arrow from water to Boiling of space Mg left parenthesis OH right parenthesis subscript 2 left parenthesis straight s right parenthesis space plus space straight H subscript 2 left parenthesis straight g right parenthesis$
(ii) Magnesium burns in the atmosphere of CO₂ to form magnesium oxide.
$2 Mg left parenthesis straight s right parenthesis plus space CO subscript 2 left parenthesis straight g right parenthesis space rightwards arrow space space 2 MgO left parenthesis straight s right parenthesis space plus space straight C left parenthesis straight s right parenthesis$
(iii) Magnesium reacts with dilute sulphuric acid liberating dihydrogen gas.
$Mg left parenthesis straight s right parenthesis space plus space straight H subscript 2 SO subscript 4 left parenthesis aq right parenthesis space rightwards arrow space space space MgSO subscript 4 left parenthesis aq right parenthesis space plus space straight H subscript 2 left parenthesis aq right parenthesis$
(iv) Magnesium burns in the atmosphere of nitrogen to form magnesium nitride.
$3 Mg left parenthesis straight s right parenthesis space plus space straight N subscript 2 left parenthesis straight g right parenthesis space space rightwards arrow space space Mg subscript 3 straight N subscript 2 left parenthesis straight s right parenthesis$

Some More Questions From The s-Block Elements Chapter

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The S-Block Elements

What happens when:
(i) magnesium is heated with water.
(ii) magnesium is heated in an atmosphere of carbon dioxide,
(iii) magnesium is treated with dilute sulphuric acid and
(iv) magnesium is treated with nitrogen?

Some More Questions From The s-Block Elements Chapter

The softness of group 1 elements increases down the group with increasing atomic number. Give reason.

Which is the most reactive alkali metal and why?

Why alkali metals do not form M²⁺ions?

Name the radio active element in group 1. How does it resemble with the remaining elements of the group?

Why alkali metals are normally kept in kerosene oil?

Why lithium cannot be stored in kerosene?

Why does lithium form complexes?

Why are alkali metal ions diamagnetic and colourless?

Why are alkali metals the most electropositive in nature?

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

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For Daily Free Study Material Join wiredfaculty

The S-Block Elements

What happens when:(i) magnesium is heated with water.(ii) magnesium is heated in an atmosphere of carbon dioxide,(iii) magnesium is treated with dilute sulphuric acid and(iv) magnesium is treated with nitrogen?

Some More Questions From The s-Block Elements Chapter

The softness of group 1 elements increases down the group with increasing atomic number. Give reason.

Which is the most reactive alkali metal and why?

Why alkali metals do not form M2+ ions?

Name the radio active element in group 1. How does it resemble with the remaining elements of the group?

Why alkali metals are normally kept in kerosene oil?

Why lithium cannot be stored in kerosene?

Why does lithium form complexes?

Why are alkali metal ions diamagnetic and colourless?

Why are alkali metals the most electropositive in nature?

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

What happens when:
(i) magnesium is heated with water.
(ii) magnesium is heated in an atmosphere of carbon dioxide,
(iii) magnesium is treated with dilute sulphuric acid and
(iv) magnesium is treated with nitrogen?

Why alkali metals do not form M²⁺ions?