Hormones are secreted in the body by several glands that are essential for the growth, development, reproduction, etc.  They are the chemical substances which coordinate the activities of living organisms and also their growth. They are secreted by special tissues in our body through endocrine glands. 

When a solution of sodium hydrocarbonate is heated, sodium carbonate and water are formed with the evolution of carbon dioxide gas.
2NaHCO₃−→−Heat Na₂CO₃ + H₂O + CO₂

• Features of Mendeleev’s Periodic Table:

1. There  are  seven  horizontal  rows  in  the  periodic  table,  numbered  from 1  to  7.  These seven rows are called periods.
2. There  are  eight  vertical  columns  numbered  from  I  to  VIII.  These eight columns are called groups. Groups I to VII are further divided into sub groups A and B.
3. The properties of elements in a particular period show regular gradation from left to right.

• Achievements of Mendeleev’s Periodic Table:

1. Mendeleev  kept  some  blank  spaces  in  the  periodic  table  for  the  elements which were  yet  to  be discovered.
2. He also predicted properties of some elements even before their discovery which were later found to be correct.
3. Mendeleev’s periodic table could accommodate noble gases when they were discovered.

As we all know, we, Indians were under the British imperial rule during the pre independent period.. we are also familiar with the fact that all the Raw materials were exported from India to England in order to process them in the industries present in England and make them into finished goods.. Hence, London is called as a finishing centre.

As soon as the narrator, James Herriot, reached the surgery, the household dogs surrounded him. When Tricki was put down, the dogs came to him and sniffed him. But soon concluding Tricki to be an uninteresting object, they left him. However on d second day, he was quickly engulfed in the pack..

Hari Singh did not catch the train deliberately because his inner conscience held him back. He thought that Anil would feel sad not for loss of money but for the loss of trust he had reposed in him. Moreover, he did not want to lose the chance of learning. His inner self was transformed.

When Miss Mason announced Wanda petronski as the winner of drawing competition then the children including all girls and boys burst into applause , one of the girl Maddie who use to be a part in teasing Wanda admired the beauty of one of the blue dress. Everyone clapped after having a look of Wanda's drawing. Even the boys who were not interested in drawing applauded and whistled at the taw-dropping sketches that Wanda had made of the hundred dresses she claimed to have.

Civil Disobedience Movement • February 1922, Mahatma Gandhi decided to withdraw the Non-Cooperation movement. He felt the movement was turning violent in many places and satyagrahis needed to be properly trained before they would be ready for mass struggle. • When the Simon Commission arrived in India in 1928, it was greeted by the slogan ‘Go back Simon. All parties including the Congress and the Muslim League, participated in the demonstrations. • October 1929, a round table conference to discuss a future constitution. • December 1929, Jawahar Lal Nehru demanded Purana Swaraj’ or full independence for India. • It was declared that 26 January 1930, would be celebrated as the Independence Day when people were to take a pledge to struggle for complete independence. 1. The Salt March— • Gandhiji found in salt a powerful symbol that could unite the nation. • On 31 January 1930, Gandhiji sent a letter to Irwin stating eleven demands. The most important demand was to abolish salt tax. • Gandhiji gave an ultimatum that if the demands were not fulfilled by 11 March, the Congress would launch a civil disobedience campaign, but the Irwin was unwilling to negotiate. • Mahatma Gandhi started his famous Salt march over 240 miles from Sabarmati to Dandi. • Thousands from different parts of the country broke the salt law, manufactured salt and demonstrated in front of government factories.

Civil disobedience is the active, professed refusal of a citizen to obey certain laws, demands, orders or commands of a government. By some definitions, civil disobedience has to be nonviolent to be called "civil". Hence, civil disobedience is sometimes equated with peaceful protests or nonviolent resistance. On March 12, 1930, Indian independence leader Mohandas Gandhi begins a defiant march to the sea in protest of the British monopoly on salt, his boldest act of civil disobedience yet against British rule in India. Britain's Salt Acts prohibited Indians from collecting or selling salt, a staple in the Indian diet.

The Non-cooperation movement was withdrawn because of the Chauri Chaura incident. Although he had stopped the national revolt single-handedly, on 10 March 1922, Gandhi was arrested. ... This led to suppression of the movement and was followed by the arrest of other leaders. A section of the big business remained sceptical towards the movement. They seemed to be afraid of labour unrest in their factories. People had not learnt or fully understood the method of non-violence. Violent incident in Chauri-Chaura in February 1922 marred the spirit of the movement.

Satyagraha is the idea of non-violent resistance (fighting with peace) started by Mohandas Karamchand Gandhi (also known as "Mahatma" Gandhi). Gandhi used satyagraha in the Indian independence movement and also during his earlier struggle in South Africa. Satyagraha or holding onto truthor truth force – is a particular form of nonviolent resistance or civil resistance. Someone who practices satyagraha is a satyagrahi. The term satyagraha was coined and developed by Mahatma Gandhi (1869–1948).

On 10th March 1920 the Khilafat Conference met at Calcutta and decided upon Non-cooperation as the best weapon to further the object of their agitation...the Non-cooperation commenced on 1st August 1920. Non-Cooperation movement was started by Gandhi Ji in 1920 to drive the Britishers out of the country and Khilafat movement was organised under the leadership of Mohammad Ali and Shaukat Ali (popularly known as Ali brothers), Abul Kalam Azad, Hasrat Mohani and others to force the British government to undo the injustice done to the Sultan of Turkey.

Formic acid, systematically named methanoic acid, is the simplest carboxylic acid, and has the chemical formula HCOOH. It is an important intermediate in chemical synthesis and occurs naturally, most notably in some ants. Formic acid (HCO2H), also called methanoic acid, the simplest of the carboxylic acids, used in processing textiles and leather. The principal use of formic acid is as a preservative and antibacterial agent in livestock feed. When sprayed on fresh hay or other silage, it arrests certain decay processes and causes the feed to retain its nutritive value longer. Formic acid appears as a colorless liquid with a pungent odor. 

Anil was a kind , simple and easy going young man. He was tall and lean stature and interested in sports like Wrestling . He was not very rich and could not offered to employee Hari as a cook. He had the patience and goodness to not only teach Hari to cook but also to read , write and add numbers.

The pilot of the Dakota wanted to thank the pilot of the black plane after he landed safely as he owed his life to him. The writer's values reflected through this desire are that he felt indebted to the other pilot and wished to express his gratitude. He was humble and grateful for the miracle that had occurred.

Electric potential, the amount of work needed to move a unit charge from a reference point to a specific point against an electric field. The potential difference (which is the same as voltage) is equal to the amount of current multiplied by the resistance. A potential difference of one Volt is equal to one Joule of energy being used by one Coulomb of charge when it flows between two points in a circuit. In any electric field there are two points of electric potential that are of significant interest to us. There's a point of high potential, where a positive charge would have the highest possible potential energy, and there's a point of low potential, where a charge would have the lowest possible potential energy.

(i) The electronics industry covers a wide range of products from transistor sets to television, telephones, cellular telecom, papers, telephone exchange,radars, computers and many other equipment required by the

telecommunication industries. Bangalore is the electronic capital of India.Other centres are Mumbai, Delhi, Hyderabad, Pune, Chennai, Kolkata,Lucknow and Coimbatore.

(ii) 18 Software Technology Parks provide single window service and high data communication facility to software experts.

(iii) This industry has played a significant role in generating employment. Upto 31 March 2005, the IT industry employed over one million persons. This number has been increasing fast year after year.

(iv) This industry has been a major foreign exchange earner in the last two or three years because of its fast growing Business Processes Outsourcing (BPO) sector.

(v) The continuing growth in the hardware and software is the key to the success of Information Technology industry in the country.

(i) Spread of fertilizer industry rests on raw materials ie, coal, petroleum and natural gas and hence it is located near to it.
(ii) After Green Revolution it is expanded to many parts of the country where agricultural prosperity is achieved.
(iii) Fertilizer can be transported through pipelines to far off places which causes decentralization.

Cement is manufactured through a closely controlled chemical combination of calcium, silicon, aluminum, iron and other ingredients. Common materials used to manufacture cement include limestone, shells, and chalk or marl combined with shale, clay, slate, blast furnace slag, silica sand, and iron ore. Limestone is the primary raw material for the cement industry and important for smelting iron ore in the blast furnace.