Tag: introduction to acid and base

Questions Related to introduction to acid and base

Acids and bases are important because of :

chemistry introduction to acid and base neutralisations in everyday life acids and bases in daily life neutralisation reaction

  1. their use in industry

  2. their effects on human health

  3. their effects on farmer's crops

  4. their use in neutralization to form salts

Show answer
Correct Option: A,B,C,D
Explanation:
1. Acid and base are commonly used in industry on a large scale. For example, The steel industry uses hydrochloric acid to clean metal sheets before processing. On the other side of the pH scale, paper manufacturers make use of sodium hydroxide to remove lignin from paper pulp.

2. Both these are also important for the human body. Our kidneys and lungs work to maintain the acid-base balance. Acids are very lethal if not taken care of for the human body and causes like excessive skin problems, cramping, tooth decay, ligament problems, and even cancers.

3. The acid attack associated with a chemical change in the soil that can restrict the availability of essential plant nutrients and increase the availability of toxic elements. It is known as Soil acidity affects which totally affects the growth and nutritional values of crops.

4. All acid and base react with each other and resulting in a neutralization reaction by forming a salt and water like
$HCl + NaOH \to NaCl (salt) + H _2O (water).$

Thus all given options are correct.

Which acids/ bases are used for the following?
(i) To neutralize sting of wasps
(ii) In alkaline batteries
(iii) Manufacturing of soap

chemistry introduction to acid and base neutralisations in everyday life acids and bases in daily life neutralisation reaction

  1. (i) $CH _3CHO$ (ii) $CsOH$ (iii) $Ca(OH) _2$

  2. (i) $CH _3COOH$ (ii) $CuSO _4$ (iii)$ Ba(OH) _2$

  3. (i) $CH _3COOH$ (ii) $KOH$ (iii)$ NaOH$

  4. None of these

Show answer
Correct Option: C
Explanation:
  1. Formic acid is produced by ants and acetic acid is used as anti-wasp agents.
    2. In alkali batteries a base is used as an electrolyte which gives hydroxyl ions in solution.
    3. Manufacturing of soap requires an alkali like $NaOH$ and long chain of fatty acids like sodium stearate to form an ester or sodium acetate salt.

$X+H _2O\rightarrow Y$. 

$Y$ is used to remove grease stains from woollen clothes. Identify $X$ and $Y$.

chemistry introduction to acid and base neutralisations in everyday life acids and bases in daily life neutralisation reaction

  1. $X=HCl,  Y=NaOH$

  2. $X=NH _4OH,  Y=NH _3$

  3. $X=NH _3,  Y=NH _4OH$

  4. None of these

Show answer
Correct Option: C
Explanation:

Ammonia solution is good for removing stains and tarnish and can also repel moths and reduce paint odours. As ammonia reacts with the water, it is dissolved in to produce ammonium ions and hydroxide ions.

Indigestion is painful so to relieve indigestion, we take an antacid such as milk of magnesia , which 
contains :

chemistry introduction to acid and base neutralisations in everyday life acids and bases in daily life neutralisation reaction

  1. magnesium hydroxide

  2. hydrochloric acid

  3. tartaric acid

  4. calcium hydroxide

Show answer
Correct Option: A
Explanation:

Milk of magnesia (also known as magnesium hydroxide; $ { Mg }{ (OH) } _{ 2 } $) is basic in nature and one of the most important ingredients of an antacid. 


The hydroxide ions from $ { Mg }{ (OH) } _{ 2 } $) undergo neutralisation with $ { H }Cl $ in the stomach produced during indigestion or gastric problems, to produce water. Equation is as follows :

$ \quad 2HCl\quad +\quad Mg{ (OH) } _{ 2 }\quad \rightarrow \quad Mg{ (Cl) } _{ 2 }\quad +\quad 2{ H } _{ 2 }O $


Hence the option A is correct.

Ant bite is treated by application of __________.

chemistry introduction to acid and base neutralisations in everyday life acids and bases in daily life neutralisation reaction

  1. washing soda

  2. baking soda

  3. neutral solution

  4. acidic solution

Show answer
Correct Option: B
Explanation:

The venom ant bites are acidic in nature. So, it's effects can be neutralised by bicarbonate of soda such a baking soda or an alkali (basic in nature). 


Hence the correct option is B.