Question:
Soaking in cold water and then washing in dilute ammonia is a method of removing which of the following type of stain?
Soaking in cold water and then washing in dilute ammonia is a method of removing which of the following type of stain?
Show Hint
Never apply hot water to blood, egg, or milk stains!
Heat coagulates protein, making protein stains permanent.
Always use cold water first, followed by dilute ammonia.
Heat coagulates protein, making protein stains permanent.
Always use cold water first, followed by dilute ammonia.
Updated On: Sep 14, 2026
- Fresh curry stain
- Ball pen ink stain
- Fresh tea stain
- Fresh blood stain
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Concept:
Stain removal is an essential procedure in textile care and laundering.
Stains are classified into protein, vegetable, grease, mineral, and dye stains, and each class requires specific reagents and procedures based on chemical composition.
Step 1: Nature of Blood Stains:
Blood is a protein-based stain (containing albumin and haemoglobin).
Hot water must NEVER be used on fresh protein stains because heat coagulates proteins, setting them permanently into the textile fibres.
Step 2: Recommended Removal Procedure for Fresh Blood:
The fabric should immediately be soaked in cold water for about 30 minutes to dissolve and loosen the protein.
If the stain persists, it should be treated with a mild alkaline solution, such as dilute ammonia or salt solution, which breaks down the dried blood pigments without damaging the fabric fibres, followed by a thorough rinse.
Step 3: Analyzing Other Stains:
- Fresh curry stain: Vegetable stain containing turmeric; treated with soap and water and exposed to sunlight, or bleached.
- Ball pen ink stain: Requires organic solvents like methylated spirit, acetone, or alcohol.
- Fresh tea stain: Vegetable tannin stain; treated by pouring boiling water from a height or applying borax.
Step 4: Evaluating the Options:
Soaking in cold water followed by treatment with dilute ammonia is the standard method for removing fresh blood stains.
Final Answer:
Therefore, the correct answer is (D) Fresh blood stain.
Stain removal is an essential procedure in textile care and laundering.
Stains are classified into protein, vegetable, grease, mineral, and dye stains, and each class requires specific reagents and procedures based on chemical composition.
Step 1: Nature of Blood Stains:
Blood is a protein-based stain (containing albumin and haemoglobin).
Hot water must NEVER be used on fresh protein stains because heat coagulates proteins, setting them permanently into the textile fibres.
Step 2: Recommended Removal Procedure for Fresh Blood:
The fabric should immediately be soaked in cold water for about 30 minutes to dissolve and loosen the protein.
If the stain persists, it should be treated with a mild alkaline solution, such as dilute ammonia or salt solution, which breaks down the dried blood pigments without damaging the fabric fibres, followed by a thorough rinse.
Step 3: Analyzing Other Stains:
- Fresh curry stain: Vegetable stain containing turmeric; treated with soap and water and exposed to sunlight, or bleached.
- Ball pen ink stain: Requires organic solvents like methylated spirit, acetone, or alcohol.
- Fresh tea stain: Vegetable tannin stain; treated by pouring boiling water from a height or applying borax.
Step 4: Evaluating the Options:
Soaking in cold water followed by treatment with dilute ammonia is the standard method for removing fresh blood stains.
Final Answer:
Therefore, the correct answer is (D) Fresh blood stain.
Was this answer helpful?
0
0
Top CUET Home Science Questions
- Which of the following Food Safety Management System indicate a comprehensive approach from the farm to the store or consumer to identify potential sources of risk of contamination and steps taken to minimise the risk?
- What type of food service system involves preparation of food centrally at one place but is distributed to several remote areas for final preparation and service?
- Read the following passage carefully and answer the question.
Proportion: Proportion concerns the relation of one part of an object to another. A good design does not permit easy dissection. The elements are so skilfully blended that where one leaves off and the other one begins is not really apparent. This relationship is created in size, colour, shape and texture. All these need to be pleasingly related to each other and to the whole. This is generally based on the proportion of golden mean which is represented by ratios like 3:5:8 to 5:8:13 and so on. The smaller part 3 has the same relationship to the larger part 5 has to the whole 8.The garment is horizontally divided into 3:5, 5:8 or 8:13 section. These sections appear at the waist line, yoke and hamline. A dress appears pleasing if the blouse, skirt and total body represents the ratio of 3:5:8.
For example, in a skirt and blouse dress, the blouse represents 3, the skirt should represent 5, and combined effect represents 8; similarly in a shirt-pant dress, the shirt should represent 5 and pant should represent 8 and combine effect created is 13. - Read the following passage carefully and answer the following question.
Organisations consist of positions that have to be staffed. The organisation charts shows the title of each supervisor's position and by means of connecting lines who is accountable to whom, who has authority for each area and who is expected to communicate with whom. Job analysis is the procedure through which you determine the duties of company's position and the characteristics of the people to hire for them. Job analysis produces information for writing job descriptions (a list of what the job entails) and job (or person) specifications (what kind of people to hire for the job). Virtually every personnel-related action including interviewing applicants, training and appraising employees requires knowing what the job entails and what human traits one needs to do the job well. - In which year, Government of India announced the setting up of mega food processing parks for boosting food processing industry in India ?
View More Questions
Top CUET Weaving Questions
- An area where the fabric has been damaged by abraision or friction during production stages is called:
- At which stage the process of dyeing is most commonly done?
- Choose the correct combination of Elements of Design.
(A) Texture
(B) Colour
(C) Balance
(D) Form
(E) Line
Choose the correct answer from the options given below: - Which method of dyeing gives variegated and irregular cloud like effect ?
- Which of the following is a type of 'weaving defect'?
Top CUET Questions
Select the statements that are CORRECT regarding patterns of biodiversity.
(A) Species diversity increases as we move away from the equator towards the poles(B) The tropical Amazon rain forest in South America has the greatest biodiversity on earth.(C) There is more solar energy available in the temperate region than tropics.(D) Tropical environments are less seasonal relatively more constant and predictableWhich of the following hormone is not produced by placenta ?
- Individuals with karyotype of 44+XXY having overall masculine development with few feminine development like Gynaecomastia has _______ chromosomal disorder.
- Match List - I with List - II.Choose the correct answer from the options given below :
List - I
List - II
A Streptokinase I Blood-Cholestrol lowering agents B Cyclosporin II Clot Buster C Statins III Propionibacterium sharmanii D Swiss Cheese IV Immuno suppressive agent Which of the following option determines percolation and water holding capacity of soils ?
View More Questions