Tag: chemistry in everyday life

Questions Related to chemistry in everyday life

Black copper (II) oxide dissolves in colourless sulfuric acid to give:

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

  1. yellow solution of copper (II) sulfate

  2. blue solution of copper (II) sulfuric acid

  3. blue solution of copper (II) sulfate

  4. none of above

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Correct Option: C
Explanation:

$Cu(II) oxide\longrightarrow CuO$


$CuO+ H _2SO _4\longrightarrow \underbrace{CuSO _4} _{(Blue\quad coloured)}+H _2O$

Copper(II) oxide, a black solid and colourless dilute sulfuric acid react to produce copper(II) sulfate, giving a characteristic blue colour to the solution.

Hence, the corret option is $C$

The metal in metal oxide replaces the __________ from acid.

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

  1. water

  2. hydrogen

  3. oxide

  4. none of above

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Correct Option: B
Explanation:

Metals oxides will react with dilute acids to give a salt and water. The metal replaces the hydrogen. 

$2NaOH  +  C{O} _{2}   \rightarrow$

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

  1. ${Na} _{2}C{O} _{3}$

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

  3. $NaC{O} _{3}$

  4. $Na{O} _{2}$

Show answer
Correct Option: A
Explanation:

When a metal oxide reacts with a base corresponding salt and water are produced.

$2NaOH  +  C{O} _{2}   \rightarrow   {Na} _{2}C{O} _{3}  +  {H} _{2}O$

What is a metal oxide?

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

  1. Metal + oxygen

  2. Metal + ozone

  3. Metal + water

  4. Metal + water + oxygen

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Correct Option: A
Explanation:

An oxide is a chemical compound that contains at least one oxygen atom and one other element in its chemical formula. 

Hence,option A is correct.

State True or False.
Some metal oxides are acidic or amphoteric in nature. 

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

  1. True

  2. False

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Correct Option: A
Explanation:

Some metal oxides are acidic or amphoteric in nature and form salts with base in neutralization reaction. For example, aluminum oxide reacts with sodium hydroxide to form sodium aluminate.

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 $H _2O$.