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Standard X

Chemistry

Combination Reaction

A magnesium r...

Question

A magnesium ribbon is burnt in oxygen to give a white compound 'X' accompanied by emission of light. If the burning ribbon is now placed in an atmosphere of nitrogen, it continues to burn and forms a compound 'Y'. Write a balanced chemical equation when 'X' is dissolved in water.

2 M g + O_{2} \to 2 M g O

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3 M g + N_{2} \to M g_{3} N_{2}

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M g O + H_{2} O \to M g (O H)_{2}

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M g + H_{2} O \to M g (O H)_{2}

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Solution

The correct option is D $M g O + H_{2} O \to M g (O H)_{2}$
Magnesium ribbon burns in oxygen( $O_{2}$ ) to form magnesium oxide(MgO).
$2 M g + O_{2} \to 2 M g O$

Therefore, X is $M g O$ .

When MgO is dissolved in water following reaction takes place:
$M g O + H_{2} O \to M g (O H)_{2}$ .

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Similar questions

Question 36
A magnesium ribbon is burnt in oxygen to give a white compound X accompanied by emission of light. If the burning ribbon is now placed in an atmosphere of nitrogen, it continues to burn and forms a compound Y.

(a) Write the chemical formulae of X and Y.

(b) Write a balanced chemical equation, when X is dissolved in water.

Q. A magnesium ribbon is burnt in oxygen to give a white compound

X

accompanied by the emission of light. If the burning ribbon is now placed in an atmosphere of nitrogen, it continues to burn and forms a compound

Y

. Write the chemical formula of

X

and

Y

Q. Assertion :Magnesium metal burns in air to give a white ash.When this ash is treated with water, the odour of ammonia can be detected. Reason: Mg burns in air to form MgO and

M g_{3} N_{2}

. It is the

M g_{3} N_{2}

which on hydrolysis gives

N H_{3}

2 M g + O_{2} \to 2 M g O

3 M g + N_{2} \to M g_{3} N_{2}

M g_{3} N_{2} + 6 H_{2} O \to 3 M g (O H)_{2} + 2 N H_{3} ↑

Q. A solution of ________ is formed when the white ash formed by burning magnesium ribbon is dissolved in water.

Q. When Mg is burnt in air and they are decomposed by

H_{2} O

M g O, M g_{3} N_{2}

changing to

M g (O H)_{2}

and

N H_{3}

. If true enter 1, else enter 0.

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A magnesium ribbon is burnt in oxygen to give a white compound 'X' accompanied by emission of light. If the burning ribbon is now placed in an atmosphere of nitrogen, it continues to burn and forms a compound 'Y'. Write a balanced chemical equation when 'X' is dissolved in water.

The correct option is D MgO+H2O→Mg(OH)2Magnesium ribbon burns in oxygen(O2) to form magnesium oxide(MgO). 2Mg+O2→2MgOTherefore, X is MgO.When MgO is dissolved in water following reaction takes place:MgO+H2O→Mg(OH)2.

The correct option is D $M g O + H_{2} O \to M g (O H)_{2}$
Magnesium ribbon burns in oxygen( $O_{2}$ ) to form magnesium oxide(MgO).
$2 M g + O_{2} \to 2 M g O$

Therefore, X is $M g O$ .

When MgO is dissolved in water following reaction takes place:
$M g O + H_{2} O \to M g (O H)_{2}$ .