- A. proteins
- B. animal fats and vegetable oils
- C. chemicals extracted from the soil
- D. foam booster
b. animal fats and vegetable oils.
b. animal fats and vegetable oils.
- A. Potassium hydroxide
- B. Sodium hydroxide
- C. Hydrochloric acid
- D. Sodium chloride
(b) Sodium hydroxide
(b) Sodium hydroxide
- A. fast setting
- B. delayed setting
- C. hardening
- D. making paste
b. delayed setting
b. delayed setting
- A. carbolic acid
- B. acetic acid
- C. benzoic acid
- D. hydrochloric acid
a. carbolic acid
a. carbolic acid
- A. Protein
- B. fat
- C. starch
- D. vitamins
c. starch
c. starch
Propane Thiol Oxide
NaOH
Earthworm
Artificial
Starch
Propane Thiol Oxide
NaOH
Earthworm
Artificial
Starch
False. – Low concentrated Phenol is used as a disinfectant.
False – Epsum is largely used in medical industry.
True.
False – Adhesives are substances that are used to join two (or) more components.
True
False. – Low concentrated Phenol is used as a disinfectant.
False – Epsum is largely used in medical industry.
True.
False – Adhesives are substances that are used to join two (or) more components.
True
Cover your work area with old newspaper.
Take the necessary quantity of water in a jar.
Add concentrated sodium hydroxide in the jar and allow it to cool.
Then add coconut oil drop by drop and stir it well.
Pour that solution into an empty matchbox, soap can be obtained after drying.
Try this soap to wash your handkerchief.
Cover your work area with old newspaper.
Take the necessary quantity of water in a jar.
Add concentrated sodium hydroxide in the jar and allow it to cool.
Then add coconut oil drop by drop and stir it well.
Pour that solution into an empty matchbox, soap can be obtained after drying.
Try this soap to wash your handkerchief.
Natural Fertilizer
Starch
Natural Fertilizer
Starch
The three main constituents of soap are Lye (Sodium hydroxide), coconut oil, and water.
The three main constituents of soap are Lye (Sodium hydroxide), coconut oil, and water.
The two types of molecules found in the soap are
water-loving
water-hating.
The two types of molecules found in the soap are
water-loving
water-hating.
The Inorganic fertilizers are Urea, Ammonium sulphate, and Superphosphate.
The Inorganic fertilizers are Urea, Ammonium sulphate, and Superphosphate.
Phenol properties:
It is a weak acid.
It is a volatile, white crystalline powder.
It is a colourless solution but changes into the red in the presence of dust.
Phenol properties:
It is a weak acid.
It is a volatile, white crystalline powder.
It is a colourless solution but changes into the red in the presence of dust.
Uses of plaster of pairs:
In making blackboard chalks.
In surgery for setting fractured bones.
For making casts for statues and toys etc.
In the construction industry.
Uses of plaster of pairs:
In making blackboard chalks.
In surgery for setting fractured bones.
For making casts for statues and toys etc.
In the construction industry.
The ingredients of the cement are lime, clay, and gypsum.
The ingredients of the cement are lime, clay, and gypsum.
Gypsum is added to control the setting of cement.
Gypsum is added to control the setting of cement.
Earthworms take organic wastes as food and produce compost castings.
They provide a multitude of services to improve soil health and consequently plant health.
So earthworm is called a farmer’s friend.
Earthworms take organic wastes as food and produce compost castings.
They provide a multitude of services to improve soil health and consequently plant health.
So earthworm is called a farmer’s friend.
The cement is manufactured by crushing naturally occurring minerals such as limestone, clay, and gypsum through a milling process.
The cement is manufactured by crushing naturally occurring minerals such as limestone, clay, and gypsum through a milling process.
Used as fertilizers
Used in the process of making cement and plaster of Paris.
Used as fertilizers
Used in the process of making cement and plaster of Paris.
Manufacture of Detergents:
Materials used:
Acid slurry, Soda ash (or) Sodium Carbonate, Trisodium phosphate (TSP), sodium tripolyphosphate (STPP), Carboxy Methyl Chloride (or) Cellulose, Glauber’s salt, colour perfume and brightner.
Preparation:
Acid slurry is first neutralised.
Then neutralised Acid Slurry is mixed with Soda ash and kept for one hour for completion of reaction.
Other ingredients such as Trisodium phosphate (TSP), Sodium tripolyphosphate (STPP), Carboxy Methyl Chloride (or) Cellulose, Glauber’s salt, colour, perfume, brightner are then blended to the neutralised Acid Slurry with continuous mixing.
Then the mixture is dried.
Now we get detergent powder.
Manufacture of Detergents:
Materials used:
Acid slurry, Soda ash (or) Sodium Carbonate, Trisodium phosphate (TSP), sodium tripolyphosphate (STPP), Carboxy Methyl Chloride (or) Cellulose, Glauber’s salt, colour perfume and brightner.
Preparation:
Acid slurry is first neutralised.
Then neutralised Acid Slurry is mixed with Soda ash and kept for one hour for completion of reaction.
Other ingredients such as Trisodium phosphate (TSP), Sodium tripolyphosphate (STPP), Carboxy Methyl Chloride (or) Cellulose, Glauber’s salt, colour, perfume, brightner are then blended to the neutralised Acid Slurry with continuous mixing.
Then the mixture is dried.
Now we get detergent powder.
Make a pit of 30 cm or take a wooden box.
Place a thin net on the base of the pit or wooden box.
Fill it with sand for about 1-2 cm.
Spread some plant wastes (like a dry leaf, flower) and biodegradable wastes on it.
Sprinkle some water.
Add some earthworms to these substances and cover them with an old cloth or dried coconut leaf.
We can find that vermicompost is formed after four weeks.
Use this vermicompost as manure for plants and conserve soil fertility.
Advantages of using vermicompost:
Vermicompost is an excellent organic manure for sustainable agro-practices.
Vermicompost is rich in essential plant nutrients.
In improves soil structure texture, aeration, and water holding capacity and prevents soil erosion.
Vermicompost is rich in nutrients and an eco-friendly amendment to the soil for farming and terrace gardening.
It enhances seed germination and ensures good plant growth.
Vermicompost can be prepared easily.
Make a pit of 30 cm or take a wooden box.
Place a thin net on the base of the pit or wooden box.
Fill it with sand for about 1-2 cm.
Spread some plant wastes (like a dry leaf, flower) and biodegradable wastes on it.
Sprinkle some water.
Add some earthworms to these substances and cover them with an old cloth or dried coconut leaf.
We can find that vermicompost is formed after four weeks.
Use this vermicompost as manure for plants and conserve soil fertility.
Advantages of using vermicompost:
Vermicompost is an excellent organic manure for sustainable agro-practices.
Vermicompost is rich in essential plant nutrients.
In improves soil structure texture, aeration, and water holding capacity and prevents soil erosion.
Vermicompost is rich in nutrients and an eco-friendly amendment to the soil for farming and terrace gardening.
It enhances seed germination and ensures good plant growth.
Vermicompost can be prepared easily.
- A. Soaps
- B. Fertilizers
- C. Plastics
- D. All the above
(d) All the above
(d) All the above
- A. 4 – 4.5 kg
- B. 8 – 9 kg
- C. 12 – 13 kg
- D. 16 – 18 kg
(a) 4 – 4.5 kg
(a) 4 – 4.5 kg
- A. Nutrients
- B. Water
- C. Nitrogen
- D. All the above
(a) Nutrients
(a) Nutrients
- A. CaSO 4 1/2H 2 O
- B. C 6 H 5 OH
- C. MgSO 4 .7H 2 O
- D. CaSO 4 .2H 2 O
(c) MgSO 4 .7H 2 O
(c) MgSO 4 .7H 2 O
The detergent molecules have two sides.
One side water-loving and other water-hating molecules.
Water hating goes and joins with dirt and oil in the cloth while the water-loving joins with the water molecules.
When you agitate the cloth, the dirt is surrounded by many molecules and taken away from the cloth.
The dirt surrounded by the detergent molecules floats in the water making it dirty.
Finally, the cloth is clean.
The detergent molecules have two sides.
One side water-loving and other water-hating molecules.
Water hating goes and joins with dirt and oil in the cloth while the water-loving joins with the water molecules.
When you agitate the cloth, the dirt is surrounded by many molecules and taken away from the cloth.
The dirt surrounded by the detergent molecules floats in the water making it dirty.
Finally, the cloth is clean.
Principal nutrients are NPK
Nitrogen (N)
Phosphorus (P)
Potassium (K)
Principal nutrients are NPK
Nitrogen (N)
Phosphorus (P)
Potassium (K)
Compost
Vermicompost
Compost
Vermicompost
The fertilizers prepared by using natural elements by making them undergo chemical changes in the laboratories are called inorganic fertilizers.
The fertilizers prepared by using natural elements by making them undergo chemical changes in the laboratories are called inorganic fertilizers.
It was named “Portland” cement because it resembled the high-quality building stones found in Portland, England.
It was named “Portland” cement because it resembled the high-quality building stones found in Portland, England.
Posted in Class 6 on January 2, 2025 February 3, 2025
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Posted in Class 6 on January 2, 2025 February 3, 2025
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Copyright © 2026 Samacheer Kalvi