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

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

  1. $ PbO _{2} $
  2. $ H _{2}O _{2} $
  3. $ SrO _{2} $
  4. $ BaO _{2} $
Reveal answer Fill a bubble to check yourself
B,C,D Correct answer
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 $\text{D}$

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

Which of the following oxides is amphoteric in character?

  1. $CaO$
  2. $CO _2$
  3. $SiO _2$
  4. $SnO _2$
Reveal answer Fill a bubble to check yourself
D Correct answer
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.
Multiple choice chemistry chemistry of non-metals oxides of elements simple oxides oxygen

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

  1. CaO
  2. $CO _2$
  3. $SiO _2$
  4. $SnO _2$
Reveal answer Fill a bubble to check yourself
A,B,C Correct answer
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.

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

Which of the following oxides are not neutral?

  1. $CO$
  2. $SnO _2$
  3. $ZnO$
  4. $SiO _2$
Reveal answer Fill a bubble to check yourself
B,C,D Correct answer
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.

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

Select the correct statements:

  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.
Reveal answer Fill a bubble to check yourself
A,B,C Correct answer
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.

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

The species that do not contain peroxide ions is :

  1. $PbO _2$
  2. $H _2O _2$
  3. $SrO _2$
  4. $BaO _2$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Only true peroxides which have -O-O- bond give hydrogen peroxide with dilute acids.
$PbO _2$ does not give hydrogen peroxide with dilute acids. So it is not a true peroxide.

Hence option A is correct.

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

Which one of the following statement is true?

  1. According to the modern atomic theory, atoms of the same element may have different atomic weights

  2. Reduction is the process of electron loss

  3. Acidic oxide are the non-metallic oxides

  4. The solubility of all substances decreases with increase in temperature
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Acidic oxides are the oxides which reacts with water to form an acid. Acidic are non- metallic oxides. Some of the examples are ${ SO } _{ 3 }$ forms sulphuric acid and ${ CO } _{ 2 }$ forms carbonic acid. 

So, correct answer is option C.

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

Which choice or choices demonstrate amphoterism?
i. $HCl + H _{2}O \rightarrow H _{3}O^{+} + Cl^{-}$ and $H _{2}O + N _{3} \rightarrow OH^{-} + NH _{4}^{-}$
ii. $HS^{-} + HCl \rightarrow Cl^{-} + H _{2}S$ and $HS^{-} + NH _{3} \rightarrow NH _{4}^{+} + S^{2-}$
iii. $HCl + NaOH \rightarrow NaCl + H _{2}O$ and $NaCl + H _{2}O \rightarrow HCl + NaOH$

  1. i only

  2. ii only

  3. iii only

  4. i and ii only

  5. i and iii only
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Amphoteric compound or ion is a molecule that cn act as both acid as well as base.

In the first reaction, $H _2O$ acts as both acid and base.It accepts proton and loses proton. Hence. it shows amphoterism.
In the second reaction, ${ HS }^{ - }$ does the same thing.
It accepts and loses proton. 
Hence, both shows amphoterism.

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

Which one among the following can be classified as amphoteric?

  1. $Na _3PO _4$

  2. HCl

  3. NaOH
  4. $HSO^- _4$
  5. $C _2O^{2-} _4$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

$\displaystyle HSO^- _4$ can be classified as amphoteric. It can donate a proton and act as an acid. At the same time, it can accept a proton and act as a base.
$\displaystyle HSO^- _4 \rightarrow H^+ + SO _4^{2-}$
$\displaystyle HSO^- _4 + H^+ \rightarrow H _2SO _4$