Tag: chemistry

Questions Related to chemistry

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.

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.