Tag: oxides of elements
Questions Related to oxides of elements
Most basic oxide among the following is ?
-
${{\text{P}} _{\text{2}}}{{\text{O}} _{\text{5}}}$
-
${\text{SnO}}$
-
${{\text{B}} _{\text{2}}}{{\text{O}} _{\text{3}}}$
-
${\text{MgO}}$
Which one of the following is normal oxide?
-
$K{O _2}$
-
$Ba{O _2}$
-
$Si{O _2}$
-
$Cs{O _2}$
${PbO _2}$ is :
-
acidic.
-
basic.
-
reducing agent.
-
oxidizing agent.
$PbO _2$ is amphoteric so it can act as acid as well as base. Also it is strong oxidising agent.
Which of the following oxides is/are neutral?
-
${N _2 O}$
-
$CO$
-
${Al _2 O _3}$
-
$NO$
$Al _2O _3$ is amphoteric oxide, apart from this all other are neutral oxides.
Which of the following is/are peroxide(s) ?
-
$ PbO _{2} $
-
$ H _{2}O _{2} $
-
$ SrO _{2} $
-
$ BaO _{2} $
In $ {PbO} _{2}, $ Its $ Pb^{+4}$ & $ 2O^{-2} $
In $ {H _{2}O} _{2},$ there is peroxide linkage
In $ SrO _{2}, $ as Sr is alkaline earth metal
$ \therefore $ Its $ Sr^{2+} $
$ \therefore $ Its $ O _{2}^{-2}, (\bar{O}-\bar{O}) $ peroxide linkage
In $ BaO _{2},$ Its $ Ba^{{+2}}\therefore O _{2}^{-2} $
$ \bar{O}-\bar{O} $ peroxide linkage
Hence, the correct options are $\text{B}$, $\text{C}$ and $\text{D}$
Which of the following oxides is amphoteric in character?
-
$CaO$
-
$CO _2$
-
$SiO _2$
-
$SnO _2$
$SnO _2 + 2NaOH \rightarrow Na _2SnO _3 + H _2O$
$SnO _2 + 4HCl \rightarrow SnCl _4 + 2H _2O$+$CO _2$ is acidic in character.
$SiO _2$ is very weak acid.
A metal oxide is acidic when :
-
$\sqrt{\varphi}\, <\, 2.1$
-
$\sqrt{\varphi}\, =\, 2.1\, to\, 3.2$
-
$\sqrt{\varphi}\, >\, 3.2$
-
None of these
A metal oxide is acidic when $\sqrt{\varphi}\, >\, 3.2$
Which of the following oxides is/are not amphoteric in character?
-
CaO
-
$CO _2$
-
$SiO _2$
-
$SnO _2$
$CaO$, $CO _2$ and $SiO _2$ when dissolved in water gives base ,hence they are basic oxides.
Which of the following oxides are not neutral?
-
$CO$
-
$SnO _2$
-
$ZnO$
-
$SiO _2$
$CO$ is a neutral oxide insoluble in water, but behaves as amphoteric compound.
Select the correct statements:
-
s-block metal oxides are basic in nature, except $BeO$ which is amphoteric.
-
p-block metal oxides are acidic in nature, except $NO$,$ N _2O$,$ CO$.
-
d-block metal oxides are basic, acidic, and amphoteric in nature.
-
d-block metal oxides are only basic in nature.
(A) BeO is amphoteric in nature. It reacts with acids as well as alkalies. Oxides of other s block metal elements are basic in nature. They react only with acids. hence, the option A is correct.