Tag: chemistry

Questions Related to chemistry

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

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

  1. basic oxides

  2. acidic oxides

  3. amphoteric oxide

  4. none of above

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Correct Option: A,C
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:
$A{l} _{2}{O} _{3} +2OH^– + 3{H} _{2}O → 2[Al {(OH)} _{4}]^–$

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

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

  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

Show answer
Correct Option: B
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) $

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

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

  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.

Show answer
Correct Option: B
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) $

? $ +  CO _2  \rightarrow CaCO _3 + H _2O $

What is the other reactant?

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

  1. $CaOH$

  2. $Ca(OH) _3$

  3. $Ca(OH) _2$

  4. None of the above

Show answer
Correct Option: C
Explanation:

The other reactant is calcium hydroxide.
$ Ca(OH) _2   +    CO _2 \rightarrow CaCO _3 + H _2O $

Which of the following is a neutral non-metallic oxide?

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

  1. $CO$

  2. $NO$

  3. $H _2O$

  4. All of above

Show answer
Correct Option: D
Explanation:

Neutral non-metallic oxides are oxides of non-metal that neither neutralizes acids or base, example $CO,\ NO$ and $H _2O$.

When sodium hydroxide reacts with carbon dioxide, it gives:

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

  1. washing soda

  2. baking soda

  3. potash

  4. none of above

Show answer
Correct Option: A
Explanation:

When sodium hydroxide reacts with carbon dioxide it gives washing soda, also known as sodium carbonate and water.
$2 NaOH + CO _2  \rightarrow  Na _2CO _3 + H _2O $

Why non-metallic oxides are mostly acidic?

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

  1. they readily accept proton.

  2. they are bitter in taste.

  3. they readily lose proton.

  4. None of above.

Show answer
Correct Option: C
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. 

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

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

  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

Show answer
Correct Option: A
Explanation:

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

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

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

  1. $CuNO _3$ and water

  2. $CuNO _3$ and hydrogen

  3. $Cu(NO _3) _2$ and hydrogen

  4. $Cu(NO _3) _2$ and water

Show answer
Correct Option: D
Explanation:

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

$CuO$ reacts with $H 2SO _4$ to form _____.

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

  1. $CuSO _4$

  2. $Cu$ metal

  3. $Cu _2O$

  4. $Cu _2SO _4$

Show answer
Correct Option: A
Explanation:

The reaction of $CuO$ with sulphuric acid gives copper sulphate.
$\displaystyle CuO + H _2SO _4 \rightarrow CuSO _4 + H _2O$