☰
Care, Maintenance and Storage of Clothes
List two main ingredients which are used for making a detergent. Write in detail how they help to remove dirt from clothes. Comment on cleaning quality of the soap/ detergent you are using to wash your clothesat home. In your opinion, what is the reason for your satisfaction/ dissatisfaction.
Detergents contain:
The process of removing dirt:
The cleansing action of soap is due to emulsification and micelle formation. Soaps are sodium salts of higher fatty acids such as sodium stearate, C17H35COO–Na+, which ionises as
The anionic head of stearate ion (—COO–) is hydrophobic in nature and has a great affinity for water, while the hydrocarbon part (C17H35) is hydrophobic in nature and great affinity for oil grease etc.
When soap is added to water containing dirt, the soap molecules surround to dirt particles in such a manner that their hydrophobic parts attached to the dirt molecules and the hydrophilic parts point away from the dirt molecule.
This is known as micelle formation thus we can say that the polar group dissolves in water while the non-polar group dissolves in the dirt particles. Now these micelles are negatively charged they do not coalesce and a stable emulsion is formed.
| Soaps | Detergents |
| Cleansing quality of soap is dissatisfactory. | Cleaning quality of detergent is satisfactory. |
| Soap is not effective in cold water | Detergent dissolves in cold and hot water. |
| More water is required for rinsing. | Less water is required for rinsing |
Sponsor Area
Draw a symbol which indicates on the label, the quality and purity of a woollen sweater.
Draw suitable symbols for a care label of a dress to indicate that it should be tumble dried and not to be bleached.
Mention any two indicators by which you will know the dress has not been cut along the selvedge.
Other than buying fabric from a reputed shop and of a reputed brand, what four features would you check in the fabric, to ensure its good quality?
After three months , when Reena took out her dress from the storage she found patches and holes in it. She was surprised to see the damage because she had removed the stains before storing it. Explain in detail eight probable reasons that might have caused this damage.
List two main ingredients which are used for making a detergent. Write in detail how they help to remove dirt from clothes. Comment on cleaning quality of the soap/ detergent you are using to wash your clothesat home. In your opinion, what is the reason for your satisfaction/ dissatisfaction.
Draw a standard mark which indicates that the wool is pure.
Neha has some grease and coffee stains on her cotton dress. Suggest her one suitable chemical each which will help her to remove the stains. Also, tell her important precautions she should take while removing these stains. Name one more stain each for which these two chemicals can be used.
State two reasons to justify the price of a costly fabric.
Your school dress shirt is white and got stained with oil poured out from your tiffin box. How will you remove it.
Sponsor Area
Sponsor Area