Tag: introduction to acid and base

Questions Related to introduction to acid and base

Calcium hydroxide (slaked lime) is used in :

  1. plastics and dyes

  2. fertilizers

  3. antacids

  4. white washing


Correct Option: D
Explanation:

Calcium hydroxide called slaked lime is an inorganic compound. It is a colorless crystal and is obtained when calcium oxide is mixed with water. It is used in preparation of dry mixes for painting and white washing.

Caustic soda is the common name for:

  1. $\displaystyle { Mg\left( OH \right) } _{ 2 }$

  2. $\displaystyle KOH$

  3. $\displaystyle { Ca\left( OH \right) } _{ 2 }$

  4. $\displaystyle NaOH$


Correct Option: D
Explanation:

Caustic soda is sodium hydroxide which is a strong base and so it has high basicity value on $pH$ scale. It is widely used in acid-base titrations to neutralize various strong or weak acids like sulfuric acid.


Hence, the correct option is $\text{D}$

Wasp stings can be treated with:

  1. baking soda

  2. vinegar

  3. washing soda

  4. milk of magnesia


Correct Option: B
Explanation:

Wasp sting has basic venom. So an acid could be used to treat it.

Vinegar $(CH _3COOH)$/ Acetic acid is used to treat the wasp sting.

Soda water contains :

  1. carbonic acid

  2. sulphuric acid

  3. carboxylic acid

  4. nitrous acid


Correct Option: A
Explanation:

Soda water is carbonated water. It contains water into which carbon dioxide gas under pressure has been dissolved. It is carbonic acid. The vast majority of carbonated water is sold in drink bottles as soft drinks and beverages.

Vinegar contains which organic acid?

  1. Vanillic acid

  2. Lactic acid

  3. Oxalic acid

  4. Acetic acid


Correct Option: D
Explanation:

Vinegar is a liquid consisting about 5-20% of organic acid that is acetic acid $(CH _3COOH)$ and water. It is a mild acid. Vinegar is mainly used as cooking ingredient.

Which of the following base is used as antacid to neutralize stomach acidity?

  1. ${ Mg(OH) } _{ 2 }$

  2. $KOH$

  3. ${ Ca(OH) } _{ 2 }$

  4. $NaOH$


Correct Option: A
Explanation:

Magnesium hydroxide is also known as milk of magnesia and it is a common component of antacids and laxatives. It interferes with the absorption of folic acid and iron. It carries away much of the body's supply of potassium and neutralizes the stomach acid.

To protect tooth decay we are advised to brush our teeth regularly. The nature of the toothpaste commonly used is:

  1. acidic

  2. basic

  3. netural

  4. corrosive


Correct Option: B
Explanation:

Mouth has salivary amylase enzyme and the process of digestion starts from mouth making the acidic environment which causes the tooth decay so it is neutralized by using toothpaste basic in nature.

Milk of magnesia is an:

  1. acid

  2. antacid

  3. alkali

  4. rock salt


Correct Option: B,C
Explanation:

Milk of magnesia is $Mg(OH) _2$, it is an alkali.

Antacid is those compounds which completely neutralizes an acid.
For example: $\underbrace{Mg(OH) _2} _{Base}+\underbrace{H _2SO _4} _{Acid}\longrightarrow  \underbrace{MgSO _4} _{Neutral\ salt}+H _2O$
Thus, milk of magnesia is also an antacid.

Which of the following is a use of $Al(OH) _3$?

  1. It is used in fire extinguisher as a foaming agent

  2. It is used in the preparation of fertilizers

  3. It is used in removing stains of grease from cloths

  4. It is used as an antacid


Correct Option: A
Explanation:

$Al(OH) _3$ is used in fire extinguisher as a foaming agent.

Which of the following is a use of sodium hydroxide?

  1. It is used in the manufacture of soaps, paper.

  2. It is used in the manufacture of synthetic fibers like rayon.

  3. It is important constituent in drain cleaners.

  4. All of the above.


Correct Option: D
Explanation:

Sodium hydroxide is used in the manufacture of soaps, paper; in the manufacture of synthetic fibers like rayon and is important constituent in drain cleaners.


Hence option D is correct