Tag: oxygen

Questions Related to oxygen

An oxide of element $A$ was analysed and found to have mass ratio of $A$ to oxygen equal to $7:3$. Then formula of oxidation can be :

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

  1. $A _{3}O _{2}$

  2. $A _{2}O _{3}$

  3. $AO$

  4. $A _{2}O$

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Correct Option: B

Titanium oxide $(TiO _{2})$ is heated in stream of hydrogen gas to give water and a new oxide $Ti _{x}O _{y}$. If $1.6\ gm$ of  $TiO _{2}$ produces $1.44\ gm$ of $Ti _{x}O _{y}$, the formula of new oxide is
[Atomic weight of $Ti=48$]:

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

  1. $TiO$

  2. $Ti _{2}O _{3}$

  3. $Ti _{2}O _{5}$

  4. $None\ of\ these$

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Correct Option: A

The pair of amphoteric oxides is: 

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

  1. $VO,\,C{r _2}{O _3}$

  2. ${V _2}{O _5},\,C{r _2}{O _3}$

  3. $V{O _2},\,C{r _2}{O _3}$

  4. ${V _2}{O _5},\,Cr{O _3}$

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Correct Option: B
Explanation:
An amphoteric compound is a molecule or ion that can react both as an acid and as a base. Many metals (such as copper, zinc, tin, lead, aluminium, and beryllium) form amphoteric oxides or hydroxides. 

Amphoterism depends on the oxidation states of the oxide. Al2O3 is an example of an amphoteric oxide.

 V2O5 and Cr2O3 are amphoteric oxides because both react with alkalies as well as acids.

So, option B is correct

Which of the following oxide is most acidic? 

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

  1. $Na _2O$

  2. $MgO$

  3. $SiO _2$

  4. $Cl _2O _7$

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Correct Option: D
Explanation:

$Na _2O$ , MgO are basic oxides.

$Cl _2O _7$  has highest acidity because it is an oxide of non metal .
Non metallic oxides are acidic 
This oxide reacts with water to give $HClO _4$ i,e,. strong acid.
So, 

Which of the following shows the tendency to from peroxide?

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

  1. Lithium

  2. Magnesium

  3. Berylium

  4. Radium

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Correct Option: A

Which of the following oxides is neutral?

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

  1. $CO$

  2. $SnO _2$

  3. $ZnO$

  4. $SO _2$

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Correct Option: B

The order in which the following oxides are arranged to decreasing basic nature is $Al _2O _3$<$MgO$<$CuO$<$Na _2O$

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

  1. True

  2. False

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Correct Option: A
Explanation:

Oxides can be called as binary compounds formed by the reaction of oxygen with other elements.  Oxides are classified as acidic, basic, amphoteric or neutral.  An oxide is a compound that contains at least one oxygen atom and one other element in its chemical formula.  Oxide is a dianion of oxygen.  Examples of oxides are CaO, BaO, ZnO etc.

Na2O, MgO, Al2O3, CuO is the decreasing order of basic nature.

An element $X$ which occurs in the second period has an outer electronic structure $s^{2}p^{2}$. The formula and acid-base character of its oxide, respectively are,

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

  1. $XO _{3}$, basic

  2. $X _{2}O _{3}$, basic

  3. $X _{2}O _{3}$, amphoteric

  4. $XO _{2}$, acidic

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Correct Option: D
Explanation:
The outer electronic configuration given is $ns^2np^2$. It is the configuration of the Carbon family. So we know that non-metal oxides are acidic and have general formula $XO _2$.
Option D is correct.

The correct increasing order of acidic strength for the following oxides ${P} _{2}{O} _{3},{N} _{2}{O} _{3},{SO} _{3}$ is

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

  1. ${P} _{2}{O} _{5}< {N} _{2}{O} _{5}< {SO} _{3}$

  2. ${P} _{2}{O} _{5}< {SO} _{3}< {N} _{2}{O} _{5}$

  3. $ {SO} _{3}< {P} _{2}{O} _{5}< {N} _{2}{O} _{5}$

  4. ${N} _{2}{O} _{5}< {P} _{2}{O} _{5}< {SO} _{3}$

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Correct Option: A

Which of the oxide gives two oxyacid in water ?

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

  1. ${N _2}{O _3}$

  2. $NO$

  3. $N{O _2}$

  4. ${P _4}{O _{10}}$

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Correct Option: B
Explanation:

Oxyacid, any oxygen-containing acid. Most covalent nonmetallic oxides react with water to form acidic oxides; that is, they react with water to form oxyacids that yield hydronium ions (H3O+) in solution. There are some exceptions, such as carbon dioxide, CO, nitrous oxide, N2O, and nitric oxide, NO.