Tag: properties of acids and bases

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

$SO _3 + Mg(OH) _2 \rightarrow $

  1. no reaction
  2. $Mg(OH) _2$
  3. $Mg(SO _4)$
  4. $H _2O$
Reveal answer Fill a bubble to check yourself
C,D Correct answer
Explanation

$SO _3$ is a non-metallic oxide which is acidic in nature and reacts with base to give a general neutralization reaction by forming a salt and water as


$SO _3+Mg(OH) _2\rightarrow MgSO _4+H _2O$
                                            Salt        water
Correct option - C,D

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

The formation of metal oxide on the surface of metal is called:

  1. cathodising

  2. anodizing

  3. acidification

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

The formation of metal oxide on the surface of metal is called anodizing. For example: aluminium oxide is formed on the surface of aluminium when it is exposed to air which prevents its corrosion.

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

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

  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
Reveal answer Fill a bubble to check yourself
C Correct answer
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 $C$

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) $