A metal ribbon ' X ' burns in oxygen with a ...

CBSE Class 10 Science 2023 Delhi Set 1

Question : 3 of 39

Marks: +1, -0

A metal ribbon '

X

' burns in oxygen with a dazzling white flame forming a white ash '

Y

'. The correct description of

X, Y

and the type of reaction is:

$X = \mathrm{Ca}$ ; $Y = \mathrm{CaO}$ ;
Type of reaction $=$ Decomposition
$X = \mathrm{Mg} ; Y = \mathrm{MgO}$ ;
Type of reaction $=$ Combination
$X = \mathrm{Al} ; Y = \mathrm{Al}_2 \mathrm{O}_3$ ;
Type of reaction $=$ Thermal decomposition
$X = \mathrm{Zn} ; Y = \mathrm{ZnO}$
Type of reaction $=$ Endothermic

Solution:

Explanation: In this reaction magnesium combines with oxygen to form magnesium oxide.

2\mathrm{Mg} + \mathrm{O}_2 \rightarrow 2\mathrm{MgO}

Go to Question:

Prev Question

Next Question