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Ask QuestionPosted by 2Anilkumar Jha 5 years, 4 months ago
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Tejaswini Chandok 5 years, 4 months ago
Vansh Gupta 5 years, 4 months ago
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Arpita .9 5 years, 4 months ago
Posted by Abhay Mahida 5 years, 4 months ago
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Gaurav Seth 5 years, 4 months ago
Clay work
- India since ancient times has been producing clay vessels. The history of clay crafts in India dates back to 6,000BC through remains found at Mehrgarh, on the western bank of the Indus River.
- Through various archaeological excavations, various remains of clay pottery have been found during the Harappan Civilisation.
- Painted grey ware (PGW) pottery remains unearthed at several archaeological sites in Punjab and Haryana. It is believed to belong to the Rig Vedic Aryan period.
- The PGW is a smooth, very fine and coloured variant of pottery. It was made of well-worked, high-quality clay with black geometric patterns on it. Floral patterns and symbols of the Sun can also be seen.
- Later, Northern Black Polished Ware developed around 400BC. It was a highly lustrous pottery developed during the Mauryan period.
Posted by Patel Sangita 5 years, 4 months ago
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Tejaswini Chandok 5 years, 4 months ago
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Anamika Chandel 5 years, 3 months ago
Posted by Aditi Vaishya 5 years, 4 months ago
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Yogita Ingle 5 years, 4 months ago
“pH has a great importance in our daily life". This can be explained by the following examples-
(i) Plants and animals are pH sensitive: Living organisms can survive only in narrow range of pH change.
(ii) Tooth decay: Change in pH of our mouth causes tooth decay. Tooth decay start when the pH of mouth is lower than 5.5. Tooth enamel gets corroded when the pH in mouth is below 5.5.
(iii) pH is our digestive system: (HCl) Hydrochloric acid is produced by our stomach that helps in the digestion of food. During digestion, if stomach produces too much acid, it will cause pain and irritation.
(iv) pH of the soil: Plants require a specific pH range for their normal growth.
Posted by Ravi Saini 5 years, 4 months ago
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Posted by Niharika Jorwal 5 years, 4 months ago
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Rajesh Sharma 5 years, 4 months ago
Yogita Ingle 5 years, 4 months ago
Washing soda is synthesized through Solvay’s process. Solvay’s process involves the reaction of sodium chloride, ammonia and carbon dioxide in water. Carbon dioxide involved is produced through calcium carbonate and the calcium oxide left is used in recovering ammonia from ammonium chloride.
At first, sodium bicarbonate is obtained which is then converted to sodium carbonate on heating. Finally, washing soda is produced by recrystallization of sodium carbonate.
- NaCl + NH3 + CO2 + H2O → NaHCO3 + NH4Cl
- 2 NaHCO3 → Na2CO3 + H2O + CO2
- Na2CO3 + 10H2O → Na2CO3.10H2O
Gaurav Seth 5 years, 4 months ago
Washing soda is synthesized by the Solvay process.
The steps are given below:
1. Sodium chloride(NaCl), ammonia( NH3) and carbon dioxide( CO2) are taken in water to form sodium bicarbonate( NaHCO3).
2. Sodium bicarbonate is separated as it precipitates out from the solution as a solid. In presence of heat, it decomposes to form anhydrous sodium carbonate( soda ash).
3. Recrystallization of the sodium carbonate obtained by dissolving in water.
The process of formation of sodium carbonate is referred to as the Solvay process which is utilised to produce washing soda.
Posted by Lehashree Srinivasan 5 years, 4 months ago
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Abhinash Sahoo 5 years, 4 months ago
Yogita Ingle 5 years, 4 months ago
Yes! my parents encouraged me to ride the new bicycle they bought when I was too scared to try it.
- I used to ride the bicycle with baby tires so it was easy for me to ride the bicycle with support.
- But when I grew up my parents bought be a bicycle that did not have the supportive baby tires in it.
- I was too scared to try it but they assured me that they won't let me fall and then with their struggle I learn how to ride a bicycle.
Posted by Anuj Choudhary 5 years, 4 months ago
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Posted by Divya Banjara 5 years, 4 months ago
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Gaurav Seth 5 years, 4 months ago
- Binary acids are certain molecular compounds in which hydrogen is bonded with a nonmetal.
- The names of binary acids begin with "hydro-" followed by the name of the other element, modified to end with "-ic."
- Binary acids are one of two classes of acids, the second being oxoacids (or oxyacids), which consist of hydrogen, oxygen, and a third element, which is often a non-metal.
Posted by Lifes Crush 5 years, 4 months ago
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Lifes Crush 5 years, 4 months ago
Posted by Pradeep Yadav 5 years, 4 months ago
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Gargi Nawghade 5 years, 4 months ago
Rajesh Sharma 5 years, 4 months ago
Yogita Ingle 5 years, 4 months ago
cos (a+b) =0
=> cos (a+b) = cos 90
=> a+b = 90
=> a = 90- b
Now
sin(a+b)
= sin(90-b-b)
= sin(90-2b)
= cos 2b [as sin (90 - x) = cos x]
Posted by Rashmi Priyqdarshnj 5 years, 4 months ago
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Yogita Ingle 5 years, 4 months ago
Anne's diary, Kitty, serves as a voice and sounding board for Anne at a time when she was relegated to silence.
Anne's diary, Kitty, allowed her to have a voice. In both the act of hiding and in her life, Anne lived a life of silence. Literally and symbolically, she was unable to speak. However, Kitty changes that by giving Anne a place where she could speak her mind. Anne admits this in her opening
Posted by Basavaraj.B.H. King. 5 years, 4 months ago
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Gaurav Seth 5 years, 4 months ago
Regionalism is one of the major challenges that any nation has to face during developmental stage. Some such challenges faced may include:-
• Financial infrastructure.
• Colonialism.
• Disparity.
• Raw material and market need.
These factors restrict a number of regions to stay undeveloped and economically backward. The development is usually noticed in only few regions around the major rural areas that are industrially developed.
For effective development, it is important that proper grants have to be offered by the leaders of the nation. Apart from this, it is also important for proper distribution of land reforms within these regions.
Posted by Anish Kadam 5 years, 4 months ago
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Posted by Rakshita Rathi 5 years, 4 months ago
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Yogita Ingle 5 years, 4 months ago
When societies develop, expand and become more complex in terms of social, economic and political relations, they need political parties to sustain governance. Political parties tend to provide the base on which the praxis of representative government is built. They gather public views on various important issues, articulate them and then present them to the government. Parties bring various representatives together, support or restrain government and its apparatus, develop policies and justify or oppose them in the public domain depending on their political ideology. These conditions are necessary for healthy development of representative democracies. Hence, it can be said that political parties are essential for this purpose.
Posted by Rakshita Rathi 5 years, 4 months ago
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Rakshita Rathi 5 years, 4 months ago
Yogita Ingle 5 years, 4 months ago
Most people of the society are in some or the other way related to a party. Partisanship is very common. as the political parties put forward their manifestos, the people decide to support different parties and they get divided. Thus political parties create social and political divisions..
Posted by Tejas Patil 5 years, 4 months ago
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Yogita Ingle 5 years, 4 months ago
Let the present age of father = x years and the present age of son = y years
According to question:
x + y = 45 ...(1)
Again, 5 years ago, the product of their ages was 124, therefore,
(Age of man 5 years ago) × (Age of son 5 years ago) = 124
(x – 5) × (y – 5) = 124
⇒ (45 – y - 5) ×(y – 5) = 124 [Using (1)]
⇒ 40y – y2 - 200 + 5y = 124
⇒ y2 - 45y + 324 = 0
⇒ y2 - 36y - 9y + 324 = 0
⇒ y(y - 36) -9 (y - 36) = 0
⇒ (y - 36)(y - 9) = 0
⇒ y = 36 or y = 9
For y = 36, x = 45 - 36 = 9 which is not possible.
For y = 9, x = 45 - 9 = 36
Therefore, the present age of father = 36 years and the present age of son = 9 years.
Posted by Tanya Chauhan 5 years, 4 months ago
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Patel Sangita 5 years, 4 months ago
Rajesh Sharma 5 years, 4 months ago
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Yogita Ingle 5 years, 4 months ago
Spherical mirrors
- Mirrors, whose reflecting surfaces are spherical, are called spherical mirrors.
- The reflecting surface of such mirrors can be considered to form a part of the surface of a sphere.
- A spherical mirror, whose reflecting surface is curved inwards, i.e. faces towards the centre of the sphere, is called a concave mirror.
Ann Treasa Cecil 5 years, 4 months ago
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Yogita Ingle 5 years, 4 months ago
The method of nourishment in Amoeba is holozoic.
The different advances engaged with the procedure of nourishment are:
- Ingestion: Amoeba ingests food with the assistance of its finger-like expansions, called pseudopodia. At the point when a food molecule approaches Amoeba, it structures pseudopodia around it and structures a food vacuole inside the Amoeba.
- Processing: Various catalysts from the cytoplasm go into the food vacuole and separate them into straightforward dissolvable atoms.
- Ingestion: The basic solvent food is consumed by cytoplasm of Amoeba from food vacuoles through the procedure of dispersion.
- Osmosis: Amoeba cell acquires vitality from the retained food through breath. This vitality is used by Amoeba for its development and fix of the body.
- Egestion: When a lot of undigested food gets gathered inside Amoeba, its cell film breaks and tosses out the undigested food.
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