What happens when:
(i) sodium reacts with hydrogen halide,
(ii) sodium reacts with acetylene,
(iii) sodium is heated with hydrogen and
(iv) sodium is treated with mercury ?

Solution

(i) When sodium is treated with hydrogen halide, hydrogen gas is evolved.
$2 Na space plus space HX space space space rightwards arrow space space space 2 NaX space plus space straight H subscript 2 2 Na space plus space 2 HCl space rightwards arrow space space 2 NaCl space plus space straight H subscript 2 2 Na space plus space 2 HBr space space rightwards arrow space space 2 NaBr space plus space straight H subscript 2$
(ii) Sodium reacts with acetylene to form sodium acetylide.
$stack HC identical to CH with Acetylene below space plus space Na space rightwards arrow space space stack space straight H minus straight C space identical to space straight C space minus Na with Sodium space acetylide below space plus space 1 half straight H subscript 2$
(iii) When sodium is heated with hydrogen, sodium hydride is produced.
$2 Na space plus space straight H subscript 2 space rightwards arrow with Heat on top space stack 2 NaH with Sodium space hydride below$
(iv) When sodium is treated with mercury, sodium amalgam is formed as the product.
$Na space plus space Hg space rightwards arrow space space space NaHg$

Some More Questions From The s-Block Elements Chapter

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The S-Block Elements

What happens when:
(i) sodium reacts with hydrogen halide,
(ii) sodium reacts with acetylene,
(iii) sodium is heated with hydrogen and
(iv) sodium is treated with mercury ?

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) sodium reacts with hydrogen halide,(ii) sodium reacts with acetylene,(iii) sodium is heated with hydrogen and(iv) sodium is treated with mercury ?

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) sodium reacts with hydrogen halide,
(ii) sodium reacts with acetylene,
(iii) sodium is heated with hydrogen and
(iv) sodium is treated with mercury ?

Why alkali metals do not form M²⁺ions?