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D and F Block Elements question

2017 · Shift 2 · Q9

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JEE Advanced
Chemistry
D and F Block Elements
2017 · Shift 2 · Q9

D and F Block Elements question

2017 · Shift 2 · Q9

JEE AdvancedChemistryD and F Block ElementsMultiple correct+4 / −1

The options(s) with only amphoteric oxides is (are)

A
$C{r_2}{O_3},BeO,SnO,Sn{O_2}$
B
$C{r_2}{O_3},CrO,SnO,PbO$
C
$NO,{B_2}{O_3},PbO,Sn{O_2}$
D
$ZnO,A{l_2}{O_3},PbO,Pb{O_2}$

View written solutionFree

Correct answer: A, D

Recall the meaning of amphoteric oxide

An amphoteric oxide reacts with both acids and bases.

Common amphoteric oxides include:

$BeO$
$Al_2O_3$
$ZnO$
$Cr_2O_3$
$SnO$
$SnO_2$
$PbO$
$PbO_2$

Now check each option.

Option A: $Cr_2O_3, BeO, SnO, SnO_2$

$Cr_2O_3$ : amphoteric
$BeO$ : amphoteric
$SnO$ : amphoteric
$SnO_2$ : amphoteric

So, all oxides are amphoteric.

$\Rightarrow$ Option A is correct.

Option B: $Cr_2O_3, CrO, SnO, PbO$

$Cr_2O_3$ : amphoteric
$CrO$ : basic oxide (not amphoteric)
$SnO$ : amphoteric
$PbO$ : amphoteric

Since $CrO$ is not amphoteric, this option does not contain only amphoteric oxides.

$\Rightarrow$ Option B is incorrect.

Option C: $NO, B_2O_3, PbO, SnO_2$

$NO$ : neutral oxide
$B_2O_3$ : acidic oxide
$PbO$ : amphoteric
$SnO_2$ : amphoteric

Since $NO$ and $B_2O_3$ are not amphoteric, this option is incorrect.

$\Rightarrow$ Option C is incorrect.

Option D: $ZnO, Al_2O_3, PbO, PbO_2$

$ZnO$ : amphoteric
$Al_2O_3$ : amphoteric
$PbO$ : amphoteric
$PbO_2$ : amphoteric

So, all oxides are amphoteric.

$\Rightarrow$ Option D is correct.

Final answer

The options containing only amphoteric oxides are:

$\boxed{A, D}$

Comparison with stored correct answer

Stored correct answer: $A, D$

My derived answer matches it exactly.

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