English
Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 8

What are the uses of acids?

Advertisements
Advertisements

Question

What are the uses of acids?

Answer in Brief
Advertisements

Solution

  1. The hydrochloric acid present in our stomach helps in the digestion of foodstuff.
  2. Vinegar (acetic acid) is used to preserve food materials.
  3. Benzoic acid is also used to preserve food materials like pickles.
  4. Sodium or potassium salts of higher fatty acids are used to make washing and bathing soaps.
  5. Sulphuric acid is called the king of chemicals. It is an effective dehydrating agent. It is used in various industries to make detergents, paints, fertilizers, and many more chemicals.
  6. Hydrochloric acid, Nitric acid, and Sulphuric acid are important laboratory reagents.
  7. Cells of all living organisms contain the fundamental nuclear material called nucleic acids. Animals have deoxyribo nucleic acid (DNA) whereas plants contain ribo nucleic acid (RNA).
shaalaa.com
  Is there an error in this question or solution?
Chapter 14: Acids and Bases - Exercises [Page 165]

APPEARS IN

Samacheer Kalvi Science [English] Class 8 TN Board
Chapter 14 Acids and Bases
Exercises | Q V. 1. | Page 165

RELATED QUESTIONS

Three solutions P, Q and R have pH value of 3.5, 5.2 and 12.2 respectively. Which one of these is a:

  1. Weak acid?
  2. Strong alkali?

What colour does the turmeric paper turn when put in an alkaline solution?


A white shirt has a yellow stain of curry. When soap is rubbed on this shirt during washing, the yellow stain turns reddish-brown. On rinsing the shirt with plenty of water, the reddish-brown stain turns yellow again.

What is the nature of soap (acidic/basic) as shown by the indicator present in curry stain?

 

What type of ions are formed?

When an acid is dissolved in water.


What do you understand by the strength of an acid? On what factors does the strength of an acid depend?


Complete the following table and write one equation for each to justify the statement: 

Reactants

Products

Method

Soluble base + Acid (dil)

Salt + water

Neutralisation Titration

Metal + Non-metal

Salt (soluble/insoluble)

______

Insoluble base + ______

Salt (soluble) + water

______

Active metal + Acid (dil)

______ + ______

______

Soluble salt solution (A) + Soluble salt solution (B)

Precipitated salt + Soluble salt

______

Carbonate/bicarbonate + Acid (dil)

Salt + ______ + ______

Decomposition of carbonate

Chlorides/nitrates + Acid (conc.)

______ + ______

Decomposition of chlorides and nitrates


Acids are ________ in taste.


Write the important uses of hydrochloric acid and sulphuric acids.


Which one of the following acids undergoes complete ionisation?


Which one of the following will not produce an acid when made to react with water.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×