Tag: oxygen

Questions Related to oxygen

Most basic oxide among the following is ?

chemistry chemistry of non-metals oxides of elements simple oxides oxygen

  1. ${{\text{P}} _{\text{2}}}{{\text{O}} _{\text{5}}}$

  2. ${\text{SnO}}$

  3. ${{\text{B}} _{\text{2}}}{{\text{O}} _{\text{3}}}$

  4. ${\text{MgO}}$

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Correct Option: C

Which one of the following is normal oxide?

chemistry chemistry of non-metals oxides of elements simple oxides oxygen

  1. $K{O _2}$

  2. $Ba{O _2}$

  3. $Si{O _2}$

  4. $Cs{O _2}$

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Correct Option: C

${PbO _2}$ is :

chemistry chemistry of non-metals oxides of elements simple oxides oxygen

  1. acidic.

  2. basic.

  3. reducing agent.

  4. oxidizing agent.

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Correct Option: A,B,D
Explanation:

$PbO _2$ 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?

chemistry chemistry of non-metals oxides of elements simple oxides oxygen

  1. ${N _2 O}$

  2. $CO$

  3. ${Al _2 O _3}$

  4. $NO$

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Correct Option: A,B,D
Explanation:

$Al _2O _3$ is amphoteric oxide, apart from this all other are neutral oxides.

Which of the following is/are peroxide(s) ?

chemistry chemistry of non-metals oxides of elements simple oxides oxygen

  1. $ PbO _{2} $

  2. $ H _{2}O _{2} $

  3. $ SrO _{2} $

  4. $ BaO _{2} $

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Correct Option: B,C,D
Explanation:

In $ {PbO} _{2}, $ Its $ Pb^{+4}$ & $ 2O^{-2} $


In $ {H _{2}O} _{2},$ there is peroxide linkage

$ H-O-O-H $ 

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?

chemistry chemistry of non-metals oxides of elements simple oxides oxygen

  1. $CaO$

  2. $CO _2$

  3. $SiO _2$

  4. $SnO _2$

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Correct Option: D
Explanation:
Option (D) is correct.
$SnO _2$ is amphoteric in character.
$SnO _2 + 2NaOH \rightarrow Na _2SnO _3 + H _2O$
$SnO _2 + 4HCl \rightarrow SnCl _4 + 2H _2O$+$CO _2$ is acidic in character.
$SiO _2$ is very weak acid.
$CaO _2$ is basic in nature.

A metal oxide is acidic when :

chemistry chemistry of non-metals oxides of elements simple oxides oxygen

  1. $\sqrt{\varphi}\, <\, 2.1$

  2. $\sqrt{\varphi}\, =\, 2.1\, to\, 3.2$

  3. $\sqrt{\varphi}\, >\, 3.2$

  4. None of these

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Correct Option: C
Explanation:

A metal oxide is acidic when $\sqrt{\varphi}\, >\, 3.2$

Which of the following oxides is/are not amphoteric in character?

chemistry chemistry of non-metals oxides of elements simple oxides oxygen

  1. CaO

  2. $CO _2$

  3. $SiO _2$

  4. $SnO _2$

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Correct Option: A,B,C
Explanation:

$CaO$, $CO _2$ and $SiO _2$ when dissolved in water gives base ,hence they are basic oxides.


$SnO _2$ do not react with water, so it is amphoteric. 

Hence options A,B, & C are correct.

Which of the following oxides are not neutral?

chemistry chemistry of non-metals oxides of elements simple oxides oxygen

  1. $CO$

  2. $SnO _2$

  3. $ZnO$

  4. $SiO _2$

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Correct Option: B,C,D
Explanation:

 $CO$ is a neutral oxide insoluble in water, but behaves as amphoteric compound. 


$SiO _2$ amphoteric oxide, $SnO _2$ basic oxide and  $ZnO$  is amphoteric oxide.

Hence options B,C & D are correct.

Select the correct statements:

chemistry chemistry of non-metals oxides of elements simple oxides oxygen

  1. s-block metal oxides are basic in nature, except $BeO$ which is amphoteric.

  2. p-block metal oxides are acidic in nature, except $NO$,$ N _2O$,$ CO$.

  3. d-block metal oxides are basic, acidic, and amphoteric in nature.

  4. d-block metal oxides are only basic in nature.

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Correct Option: A,B,C
Explanation:

(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.

(B) The oxides $NO, N _2O,CO$   are neutral. Whereas the  remaining oxides of p block metals are acidic in nature. Thus, the option B is correct.

Some of the d block metal oxides are basic in nature, some of them acidic in nature where as the rest are amphoteric in nature. Thus, the option C is correct and option D is incorrect.