NCERT- Previous year one mark questions - IV — task. Science CBSE, Class 10.

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Answer the following questions:

Answer variants:

$CuO$ +

$2HCl$ →

$CeCl_2$ +

$2H_2O$

$2Pb(NO_3)_2$

$\xrightarrow[]{Heat}$

$2PbO$ +

$4NO_2$ +

$O_2$

combination reaction

because sunlight energy is absorbed by animals

single displacement reaction

$2FeSO_4$ (s)

$\xrightarrow[]{Heat}$

$Fe_2O_3$ (s) +

$SO_2$ (g) +

$SO_3$ (g)

1. Balance the following chemical equation:

$Pb(NO_3)_2$ →

$PbO$ +

$NO_2$ +

$O_2$

2. Identify the type of reaction in the following example:

$2H_2$ (g) +

$O_2$ (g) →

$2H_2O$ (l).

3. Balance the given chemical equation:

$FeSO_4$ (s)

$\xrightarrow[]{Heat}$

$Fe_2O_3$ (s) +

$SO_2$ (g) +

$SO_3$ (g)

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