Tag: metal oxides and non metal oxides

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Questions Related to metal oxides and non metal oxides

Multiple choice chemistry chemistry in everyday life metal oxides and non metal oxides reactions of acids and bases properties of acids and bases

Oxides that react with acids to form salts are known as :

  1. basic oxides

  2. acidic oxides

  3. amphoteric oxide

  4. none of above
Reveal answer Fill a bubble to check yourself
A,C Correct answer
Explanation
Amphoteric oxides are compounds of oxygen which exhibits both acidic as well as basic characteristics. These oxides when react with acid, undergoes neutralization reaction to form water and salt. This exhibits the basic property of the compounds. Similarly reacts with alkali to form salt and water, exhibiting acidic property. Example: aluminium oxide

Acidic characteristics:
$A{l} _{2}{O} _{3} + 6HCl$ → $2Al^{3+} + 6Cl^{–} + 3{H} _{2}O$

Basic characteristics:
$A{l} _{2}{O} _{3} +2OH^– + 3{H} _{2}O → 2[Al {(OH)} _{4}]^–$
Multiple choice chemistry chemistry in everyday life metal oxides and non metal oxides reactions of acids and bases properties of acids and bases

Identify $A$ and $B$ in the following reaction.
$  A + B  \rightarrow  MgCl _2(aq) + 2H _2O(l) $

  1. $Mg(OH) _2$(s) + $2H _2SO _4(aq)$
  2. $Mg(OH) _2(s)$ + $2HCl(aq)$
  3. $MgOH(s)$ + $2HCl(aq)$

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Acid gets neutralized when it reacts with a metal oxide to give salt and water. 
Magnesium hydroxide + hydrochloric acid $\rightarrow$ magnesium chloride + water
$ Mg(OH) _2(s) + 2HCl(aq) \rightarrow MgCl _2(aq) + 2H _2O(l) $

Multiple choice chemistry chemistry in everyday life metal oxides and non metal oxides reactions of acids and bases properties of acids and bases

? $ \rightarrow BaSO _4(aq) + H _2O(l) $
What are the reactants used to carry out this reaction?

  1. $SO _4(g) + Ba(OH) _2$
  2. $SO _3(g) + Ba(OH) _2$
  3. $SO _3(g) + BaOH$

  4. The reaction does not occur.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The non-metal oxides can be neutralized with a base to form a salt and water.
$ SO _3(g) + Ba(OH) _2(aq) \rightarrow BaSO _4(aq) + H _2O(l) $

Multiple choice chemistry chemistry in everyday life metal oxides and non metal oxides reactions of acids and bases properties of acids and bases

Why non-metallic oxides are mostly acidic?

  1. they readily accept proton.

  2. they are bitter in taste.

  3. they readily lose proton.

  4. None of above.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The addition of water to a non-metal oxide results in a compound that consists of a non-metal atom surrounded by oxo ($=O$) and hydroxyl ($-OH$) groups. 

Such a molecule readily loses a proton from one of its hydroxyl groups because the resulting anion is highly stabilized by the oxygen atoms and the electronegative non-metal atom. Therefore, they are acidic. 

Multiple choice chemistry chemistry in everyday life metal oxides and non metal oxides reactions of acids and bases properties of acids and bases

Which of the following represents the products obtained when ferrous oxide reacts with nitric acid?

  1. Ferric nitrate, $NO$ and water
  2. Ferrous nitrate, $NO$ and water
  3. Ferric nitrate, $NO _2$ and water
  4. Ferrous nitrate, $NO _2$ and water
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When ferrous oxide reacts with nitric acid, the products obtained are ferric nitrate, $NO$ and water.
$3FeO + 10HNO _3 \rightarrow 3Fe(NO _3) _3 + NO + 5H _2O$

Multiple choice chemistry chemistry in everyday life metal oxides and non metal oxides reactions of acids and bases properties of acids and bases

Which of the following represents the products obtained when $CuO$ reacts with nitric acid?

  1. $CuNO _3$ and water
  2. $CuNO _3$ and hydrogen
  3. $Cu(NO _3) _2$ and hydrogen
  4. $Cu(NO _3) _2$ and water
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Wen $CuO$ reacts with nitric acid, $CuNO _3$ and water are obtained.
$CuO + 2HNO _3 \rightarrow Cu(NO _3) _2 + H _2O$