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Dobereiner Periodic Table

Advantage: To predict the atomic mass of middle element in each triad. 

Limitation: Dobereiner could identify only three triads. 

Newland Periodic table 

Advantage: Every eighth element had properties similar to that of first/co-related the properties of elements with their atomic mass.

Limitation: It was only applicable up to Calcium/only 56 elements and no future element. 

Mendeleev's Periodic Table 

Advantage: Elements with similar properties could be grouped / He predicted the existence of new elements that had not been discovered at that time. 

Limitation: No fixed position for hydrogen/position of isotopes/ Atomic masses do not increase in a regular manner.

Ebright was not only good in science and academics but also in games.

(a) Any three postulates

(b) (i) The temperature at which at real gas obeys ideal gas law.

(ii) Volume of one mole of the gas at critical temperature.

Detailed Answer :

(a) There are following three postulates of kinetic theory of Gases :

(i) Gases consist of particles in random constant motion.

(ii) The pressure of the gas is due to elastic collision of molecules with walls of container.

(iii) The average K. E. of gas is directly propotional to its temperature.

A young girl who is anxiously waiting for her first periods needs emotional support and physical caring. But Anne gets neither. She is stranger to her mother who doesn’t know what Anne thinks about the most ordinary things. She does not get along with Margot very well either. She adored her father but the age difference prevented her from talking delicate matters like sex and sexuality with him. It is quite natural for a girl of Anne’s age to get attracted towards Peter Van Daan. In Peter she finds someone who can share her innermost feelings. They are young and can talk on sex and sexuality. They develop a relationship which just falls short of love. Anne feels it more intensely. She writes : “he gave me such a warm, tender look that I started glowing inside”. But Anne makes another confession: “Don’t think I’m in love because I’m not, but I do have the feeling that something beautiful is going to develop between Peter and me.” It is “a kind of friendship and a feeling of trust.”

Anne’s first love was Peter Schiff and not Peter Van Daan. She herself doesn’t know when “Peter Schiff and Peter Van Daan” have melted into one Peter. And now she longs for Peter van Daan desperately. This develops into an intimacy and trust. She is free to talk on sex and sexuality freely with Peter. And then the moment comes when she receives the first kiss on her left cheek and ear.

Anne continues this relationship inspite of the fact that she faces hostile reactions from everyone. Her mother stops her from meeting Peter so often. Mrs. Van Daan doesn’t favour such a relationship. What shocks Anne is the attitude of her father. He warns Anne not to go too far and restrain herself. Even Margot feels jealous of Anne’s relationship with Peter as she has no one to whom she can open out her heart and share her feelings.

(a) are placed 

(b) are added 

(c) removed from the pan 

(d) is boiled

(a) is boiled 

(b) is added to it 

(c) is dipped and soaked 

(d) is spread

Value Points: 

• The teenage son of the van Daans, whose real name is Peter van Pels 
• Anne first sees Peter as obnoxious, lazy, and hypersensitive, but later they become close friends. 
• Peter is quiet, timid, honest, and sweet to Anne, but he does not share her strong convictions. 
• During their time in the annex, Anne and Peter develop a romantic attraction, which Mr. Frank discourages. 
• Peter is Anne’s first kiss, and he is her one confidant and source of affection and attention in the annex. 
• Peter dies on May 5, 1945, at the concentration camp at Mauthausen, only three days before the camp was liberated.

(a) is washed 

(b) is brought down 

(c) is placed 

(d) is then taken out

(a) The river was too full of crocodiles to swim. 

(b) The men were dressed in red lion clothes. 

(c) Mahatma Gandhi devoted himself to the service of mankind. 

(d) Burning of plastic is a curse to the environment.

Anne Frank’s diary is considered to be a valuable, historical record because neither it is fiction nor has it been composed after the incidents took place. It is the diary of someone who lived the history of the Second World War. She was an eye witness to the Holocaust, and she recorded her firsthand experience from a personal, political and social aspect. This record made by an ordinary citizen became a historical document because it was not a conscious project to document history taken up by a scholar. Rather it recounts the lived experiences of a young girl, living through the horrors of war and persecution on the grounds of ethnicity. As Anne didn’t share her feelings with anyone, she recorded them in her diary as if she were confiding to her diary named Kitty as it comforted her. She maintained it from June 12th, 1942 to August 1st, 1944. Initially, she only wrote about herself but later on she edited her diary for posterity after hearing a March 1944 radio broadcast from an exiled Dutch Government official who urged the Dutch people to keep journals and letters that would help to provide a record of what life was like under the Nazis.

The diary was considered to be authentic because Miep Gies had recovered five notebooks and some 300 loose papers containing Anne’s writings from the Secret Annexe shortly after the Frank’s arrest by the Nazis. She had hidden them in her desk and gave it to Otto Frank, the only survivor of the family, on his release from Auschwitz, who got the diary published. 

Anne’s diary provides an invaluable insight into the times, lives and hardships. It shows a rare insight from a child’s point of view.

(a) What is the good news for poor sleepers ? 

(b) A new drug-free treatment for sleeplessness can help. 

(c) This treatment may be complex but it is effective. 

(d) More and more people are adopting it.

(a)  Cassius 

(b)  Julius Caesar’s funeral is being talked about.

(c)  The speaker raised this objection because Antony was a good friend of Caesar & it was sure that he would speak ill of the conspirators & this could ignite the mob into frenzy.

(d)  Disapprove / Disagree 

Mark Antony is a clever statesman and a good friend of Caesar. He is foresighted enough to judge that Brutus is a famous public figure and has already won the approval of the plebeians, instead of censure, after killing Caesar. Now, it is upto him to turn the tide, which threatens to flow on the side of the conspirators. Antony proves to be strong in all the ways Brutus proves to be weak. His impulsive, improvisatory nature serves him perfectly to persuade the conspirators that he is on their side, thus gaining leniency. Throughout his speech, he keeps repeating, ‘Brutus is an honorable man.’ “I come to bury Caesar, not to praise him,” whereas he does just the opposite. He is able to persuade the plebeians of the conspirators’ injustice and gains mass support. He contradicts the charges of Brutus that Caesar was ambitious by pointing out that Caesar had refused the crown thrice, had filled the coffers of Rome and wept for all Romans. Not too scrupulous to stoop to deceit and duplicity, as Brutus claims to be, Antony proves himself to be a consummate politician, using gestures and rhetoric to his advantage. He graphically displays all the stabs, Brutus and others have inflicted on Caesar’s body and uses Caesar’s body to exploit the plebeians emotionally. He responds to subtle cues, tailors his words very deftly and uses the most appropriate actions to incite the people. He deliberately thrusts the words ‘mutiny’ and ‘riot’ at them and gets the desired results. 

Unlike Brutus, who prides himself on solely acting with respect to virtue and blinding himself to his personal concerns, Antony never separates his private affairs from his public actions. So, Antony’s eulogy at Caesar’s funeral is a master-stoke, and the mention of Caesar’s will that leaves money and his property to all Romans, acts as the final nail in the coffin of the conspirators. So Antony’s speech is a combination of wit, irony, sarcasm, pathos and satire.

During any crisis if your mind is alert then you can overcome the crisis easily. It is really important to maintain your cool rather than panicking. One should have mental agility instead of getting stressed. Getting stressed or panicking would only worsen the situation. We see in ‘Virtually True’ Michael played all the games that Sebastian told him to play and tried to rescue him, but was unsuccessful. Despite failing at rescuing Sebastian in so many attempts, he doesn’t lose heart and tries another time cool-headedly and using his presence of mind. While playing the last game War Zone, he pulled Sebastian up in the helicopter the moment he got a chance, thus saving his life. His presence of mind played a key role in saving Sebastian’s life.

Miss Sullivan was Helen’s instructor, teacher, guide and mentor as well. She was the embodiment of love and patience. She was an understanding person who understood Helen and her needs. She knew how to teach Helen in order to arouse her curiosity in various subjects. She used innovative and creative methods to teach Helen. Before the arrival of Christmas, she helped Helen prepare surprises for everyone. She played guessing and spelling games with her which surprised Helen. Not only this, Miss Sullivan also put surprises in her stockings and everywhere she went, like a little child, Helen was very excited to find them wherever she went in the house that day. It was a cheerful day, full of pleasant surprises for Helen. Her excitement reached its peak when Helen was presented with a canary, a sweet little bird. Helen soon grew fond of the bird and did every little thing for that birdfeeding it, bathing it, making the bird sleep etc. Thus, we can say that it was Miss Sullivan who came as a navigator in the life of Helen and showed her the path of life.

They knew the consequences of being discovered 

They got news of the people being tortured in concentration camp. 

They had to be hidden. 

They became very nervous. 

They even fall ill . 

Their teeth chattered 

They slept huddled in a corner

She lost one of her best friends Mr. Anagnos. 

She was brought in front of the court of investigation. 

She felt this very rude and menacing. 

The whole experience was very traumatic.

Helen was a very bright and happy child. She attracted everyone’s attention towards her with her mischief. In her childhood, she was an eager and self-asserting child. She imitated everyone and learnt walking as well as talking at an early age. She was the first baby in her family so she received all the love and affection of her family members. Helen herself wrote ‘I came, I saw, I conquered’ as the first baby in the family does. She started walking when she was one-year-old. Her mother had just taken her out of the bath-tub and was holding her in her lap when she started walking towards the leaves that danced in the sunlight. Even her naming ceremony was a big event. She was not to be lightly named being the first baby in the family. She imitated every one and learnt talking at an early age. Everyone was attracted towards her due to these qualities. 

In order to survive in the manipulative world today, it is important to have worldly wisdom. It is only our individuality and reasoning that can save us from getting duped and exploited by the people like frog. We must know our limitations and capabilities to be able to decide the course of our lives. 

In the poem ‘Frog and the Nightingale’, the nightingale had unmatched singing talent. She had a soft, pleasant and melodious voice. Her popularity in the Bingle Bog left its creatures enraptured and made her discover her worth as a singer. It was the frog who commercially exploited her talent and made money. Driven by a desire to be a sensational singer, she sang for excessively long hours and lost out on sleep and thus exhausted herself. The nightingale was herself to blame for her tragic end. It was more of nightingale’s gullibility than the frog’s scheming that led to her downfall and death. We should beware of such type of greedy, money-minded, hypocritical, inconsiderate and selfish people.

Helen did not like the school , fell ill. 

Though some changes were made for her ,it didnot help her at all. 

She was unable to appear in the exam 

Her mother withdrew her from the school. 

Afterwards Mr. Merton S. Keith tutored her 

Taught her twice a week 

Miss Sullivan interpreted her instructions 

Helen was able to learn well. 

Margot Frank is Anne’s elder sister. She is three years elder to Anne. When her diary begins in 1942, Margot is sixteen years old. She is a foil to her restless and rebellious young sister, Anne. She is humble and is always at peace with herself. She knows how to please others, particularly the adults. Like her mother, Margot also fails to give an emotional support to her younger sister. She keeps a deliberate distance from her. She sometimes enters into argument with her. She is considered a perfect model and her mother expects Anne to emulate her. We find that it is Margot who is first called up by the Gastapo in Amesterdam. This is a signal for the Franks that the Nazis will arrest them and send them to their concentration camps. This forces Mr. Otto Frank to go into hiding in a secret annex with his family.

Anne easily sees the difference between the way her mother and the Van Daan deal with Margot and the way they deal with her. Margot fits in well with the whole family and other adults in the annex but Anne doesn’t. Anne writes : “Margot’s and mother’s personalities are so alien to me ....... . Margot is naturally good, kind and clever, perfection itself.”

Even Frank treats Margot as the “cleverest, the kindest, the prettiest and the best”. Anne is never taken seriously as she is always considered to be the clown and mischief-maker of the family. Margot is very studious. She sends her Latin lessons to a teacher regularly. Margot is alone and she is a little jealous of Anne’s passionate relationship with Peter. She writes to Anne. “I am just sorry I haven’t found anyone with whom to share my thoughts and feelings”.

Edith Frank or Anne’s mother is a highly sentimental, conservative, cold and critical character. She is a foil to her complex daughter Anne who shows maturity and understanding of people and things which are far beyond her years. Anne needs emotional support and understanding during the tumultuous times in the annex. Ironically, Edith Frank is lacking in such finer feelings. She fails to lend any emotional support to her younger daughter. Anne also doesn’t show much and love and sympathy with her mother during the early period of her hiding in the annex. She has a few kind words to say about Mrs. Edith Frank. An adolescent girl looks for love and sympathy. But she finds her mother lacking in such finer human feelings. She is cold, critical and uncaring towards Anne. Atleast, Anne thinks so about her mother during her early years in the annex. She is a source of Anne’s anger and frustration. Actually, she finds herself helpless as she doesn’t know how to express her love to her children. It is quite surprising that Anne seldomly comments on her mother’s positive traits or behaviour.

Later in life, Anne develops a better understanding of Mrs. Edith Frank as a mother and as a wife. Anne’s growing maturity makes her a little more objective towards her mother. She gets a more balanced perspective. She regrets her quick and rash judgement of her mother. Mrs. Edith Frank shows utter lack of understanding when she stops Anne from going upstairs to meet Peter. Mrs. Edith Frank’s inability to provide emotional support for her daughter leads Anne to find an outlet for expressing her innermost feeling. It is through ‘Kitty’ or her diary. Anne moves closer to Peter because he can share her feelings and talk about sex and sexuality.

                               The Diary of a Young Girl 

In the winter of 1944, the Russian Army was on the advance. The Nazis decided to take as many prisoners as possible, who were still capable of working, back to Germany. The health of the women prisoners was a primary factor. Edith may not go along. Margot and Anne are then considered. 

At the end of October or the beginning of November 1944, Margot and Anne Frank are crammed into a crowded freight train bound for the concentration camp at Bergen - Belsen. Edith Frank is left behind at Auschwitz. 

After an awful train journey lasting three days, Margot and Anne arrives at Bergen - Belsen. More and more prisoners are being sent to Bergen-Belsen from the other concentration camps. 

In winter of 1944-1945, the situation at Bergen - Belsen deteriorates. There is little or no food and the sanitary conditions are dreadful. Many of the prisoners become ill. There was no treatment facility. Margot and Anne Frank come down with typhus. They both die just weeks before the camp is liberated.

'Prodigal' from the stanza means wasteful or unplanned.

Problems Margot and Anne face

— restricted atmosphere of Annexe- over protective parents

— Anne became tired of her parents' critical approach

— she wanted to be independent

— rebuked by mother and sister, had 'bust ups' with her mother

— Anne was a daddy’s girl – father tried to check her rebellious spirit but in vain

— could not confide in her mother, accused parents of deserting - no emotional support.

— mother's sarcasm and quick temper had been the source of Anne's anger and depression

— whereas Margot obliged to parents and received care, support and privilege from both

— they did not talk about their personal feelings with their parents because they thought that they would not understand

— wanted their parents to acknowledge their maturity and independence of spirit liked to be treated as adults

— expected a cordial approach and understanding from them

Detailed Answer : 

Margot and Anne both had become tired of their parents in spite of the fact that they still loved them. They wanted to make their own decisions without being chaperoned by their parents. Their parents were not so strict and let them read everything, but Margot and Anne were sick and tired of having to listen to their comments all day long. The customary ritual of giving them little kisses at all hours of the day was also quite tiresome to these girls, who were almost on the threshold of adulthood. The cute nicknames seemed affected. They would have liked nothing better than to get a break from their parents. Margot and Anne did not talk about all this to their parents because they felt that their parents would fail to understand. These young women were growing up with their own set of opinions, ideals and principles. Therefore, they wanted their parents to acknowledge their maturity and independence of spirit, taking them as young adults rather than children.

Sullivan's help in making Helen Keller achieve her aim in life

— Sullivan worked far beyond expectations

— Extremely patient and tolerant with Helen

— Handled her with sensitivity but firmly

— Encouraged her to explore

— helped Helen to study and learn like normal children

— Patiently taught her words and then concepts- Helen narrates how Sullivan took pains and used all techniques to teach the first abstract idea 'love'

— Sullivan spelled words on her hands during lectures

— accompanied Helen everywhere

— Constant inspiration and tireless advocate for Helen.

— for Anne everything best in her life belonged to Sullivan

Detailed Answer : 

Miss Anne Sullivan was Helen’s instructor as well as a teacher. She was sent by the Perkins Institution in Boston to teach Helen. They found her competent enough to begin Helen’s education and she arrived at Helen’s place in March. After her arrival, Helen’s life changed. Apart from being a guide and instructor she was like a mother to Helen. She accompanied her wherever she went. Miss Sullivan had great patience. Sometimes Helen used to throw temper-tantrums but Miss Sullivan always handled her very well. She taught her to communicate by writing the spellings of the words on her hand with her fingers and thereafter to write sentences also. 

Miss Sullivan was a perfect teacher who enjoyed spending her time with Helen. She taught her subjects like Arithmetic, History, Geography, Zoology, Botany, etc. in a play-way method. Both Helen and Miss Sullivan had a good time with each other throughout their lives.

Margot was the eldest child of Franks. She had reserve nature. She had won the confidence of her mummy. She always liked to share her feelings with her mummy. She never interfered into anyone’s matter. She kept to herself. She was a brilliant girl. She always scored good marks in her exams. She was a voracious reader. 

Being the eldest child, she had got opportunity and freedom to read many books that she enjoyed very much. She was on good terms with her father too. She was kind and loving to Anne. Whenever necessary and required, she gave her suggestions to Anne. 

She was friendly with Anne. She was a silent worker. She was, in fact, a contrast to Anne. She did not speak much, unlike Anne. Except her mother, she never wished to share her feelings with anyone else, however, she wanted to get one. She once said, Anne was fortunate to have a boyfriend to share her feelings with. She patiently bore the difficulties of life in hiding and never said a word of complaint. She lived an unsung life in the Secret Annexe.

Mr. Gilman, the Principal of Cambridge school, kindly offered to let her sister, Mildred, study in his school. Both the sisters spent helping each other in study. Helen took her preliminary examinations for Radcliffe from the 29th of June to the 3rd July in 1897. The subjects she offered were Elementary and Advanced German, French, Latin, English and Greek and Roman history. The candidate was required to pass in sixteen hours - twelve hours being called elementary and for advanced. Helen was allotted No. 233 and she was allowed to use a typewriter alone in a room. Mr. Gilman read all the papers to her by means of the manual alphabet. She wrote out her answers on the typewriter. The papers were difficult. Mr. Gilman spelled to her what she had written so that she could make necessary changes. Later, at Radcliffe, no one read the paper to her for any correction.

Margie was 11 years of age and she has not read as many books as Tommy had because Tommy was older to Margie, he was thirteen years of age. Margie asked Tommy that where had he found the printed book.

Helen Keller’s determination

— Helen was determined to study in Radcliffe college

— did not get into Harvard, girls not allowed

— joined Mr. Gilman’s school, tried her best to be on a par with other normal children

— advised to work hard, take extra time to finish course

— Miss Sullivan and Helen disapproved; withdrew from school

— completed preparation with Miss Sullivan’s help – tutored by Mr. Keith – qualified to join Radcliffe college

— dedication, perseverance and endurance made her achieve the impossible

— wanted to be treated as normal, did not want compassion or sympathy

— overcame all with strong determination

Detailed Answer : 

Life is not a bed of roses. Everyone has to face some problems in his life. The person who overcomes all the obstacles in his path with determination turns out to be a successful person. Helen, a deaf and a blind girl, faced problems right from her childhood. She wanted to be like other children who could see, hear and speak. Sometimes her friends discouraged her but that did not deter her from her efforts. She worked hard and gained knowledge in all subjects with the help of Miss Anne Sullivan. Miss Sullivan was one person on whom she relied on and emerged as a successful personality. Helen Keller worked to enter Radcliffe College. It was not an easy task but she had decided that she would study with normal children. It was only her will power, firm determination and Anne sullivan's guidance that made her dream come true. Though she did face problems in the college but with her perseverance, sailed out of them. Hellen Keller became the first deaf-blind person to earn a Bachelor of Arts degree. She went to regular schools and colleges, and succeeded in spite of her disadvantages due to which she had to work extra hard to keep up with her studies. Despite her moments of doubt and resentment she persevered and achieved her goals.

                              The Story of My life 

On the 29th and 30th of June, 1899, Helen took her final examinations for Radcliffe. Mr. Eugene C. Vining, an instructor at the Perkins Institution for the Blind, was employed to copy the papers for her in American Braille. The Braille worked well enough in the languages. It did not work well in the case of geometry and algebra. Helen was badly perplexed because she had used only the English Braille in her algebra. The symbols in the American Braille were different from those in the English Braille. Helen was not familiar with its signs. Mr. Keith had relied too much on her ability to solve problems mentally, so she was very slow in her work. She had to read the examples repeatedly to understand what she was required to do. She was not sure if she really read  the signs correctly. Mr. Keith could not help her. Helen remained confused. The administrative board of Radcliffe made the examination very difficult for her, knowingly or unknowingly. However, she overcame all obstacles and cleared her exams.

(a) if he knew that Varun had been hit by a two-wheeler the previous day. 

(b) it had happened. 

(c) he had been hit by a scooter on his way back from school. 

(d) if he was badly hurt. 

The Judgement 

On hearing a noise, I ran outside. I saw two men were quarreling and fighting. When the people around asked them the cause of their quarrel, the first man said, “This man has taken my dog.” The second man said, “I got it! It is mine!”. I said “fighting is not the solution of the problem.” “It is not good to fight on the street in this way”. They said, “Then what should we do.” I said, “Let’s go to Shyam who is the most intelligent man in the village and he had solved many such kind of problems.” Everybody said, “Yes, let’s go there.” 

Shyam was reading a newspaper when we told him the matter. He said, “cut the dog and give the two halves to the men.”. He asked the second man, “Do you agree. He said “Yes”. Let the dog die, If I don’t get it. But the first man said, “The dog will die if it will be cut down, please don’t cut it, give it to him.” Shyam said, “give the dog to the first man because he is the owner.” All said, “How can you say?”, “Simply”. The real owner has the real affection with the dog”. “The second man didn’t care that the dog be alive or dead but the first man loved his dog so he was ready to sacrifice it in order to save his life.”

 All appreciated the wisdom of Shyam. By using his wit and wisdom he simply solved such a complex problem.

(a) what he wanted to buy. 

(b) he wanted to buy a white dress. 

(c) him if he would like to see something else. 

(d) he would try another shop.

(a) what he wanted to buy. 

(b) he wanted to buy a white dress.

(c) he did not have any white dress. 

(d) him if he would like to see something else. 

(e) he would try another shop.

(a) if he could have a bottle of juice 

(b) they only had milk bottles 

(c) when that would be available 

(d) that he could give

(a) he seemed so tired and advised him to take rest. 

(b) he could not even think of relaxing as he had lots of homework to do. 

(c) that he should not to take so much of stress. 

(d) not to worry and requested her to give him a hot cup of tea.

(a)

(i) a different set of rules 

(b) 

(ii) the Texas country of Bexar 

(c) 

(iv) it is geographically distanced from existing library services. 

(d) 

(iv) the staff of the library is unsupportive 

A friend must be loyal. One believes his friends to be someone who will never betray him and help him out in different conditions.Here we see, Mark Antony joined conspirators in love for Rome and democracy. However, he must have given a thought on finding information from Julius, or to discuss the topic with him. He did nothing so and joined conspirators to assassinate Julius.At the end, Julius died saying "Yet tu, Brute!" as he expected him to be most loyal of senators and Brutus stabs him.

Time can destroy everything except literature. Art and culture transcends time and remain relevant throughout the ages.

Detailed Answer: 

'Pen is mightier than the Sword' because everything else fades away with the passage of time. Time is all powerful and can destroy everything except literature. Art and literature are immortal. They transcend time and remain relevant throughout the ages.

Though Calpurnia revealed her fear after nightmare yet Caesar decided to go to senate house because Brutus viewpoint was more convincing for him. He also did not want to leave the chance to become the emperor of Rome.

Value Points: 

• the inclusion of omens and dreams in Shakespeare's Julius Caesar is of great significance 
• Caesar, of course, ignores all supernatural warnings and signs for fear 
• Superstition is the fear of what is unknown and mysterious
•  belief that certain events bring good or bad luck which cannot be explained by reason or science
•  A person believing in superstitions is always haunted by unknown fears and anxieties. He lose self-confidence. 
• Education is one factor that can wipe out superstitions to some extent. 
• A scientific outlook and temper should be cultivated to do away with superstitions.

(a) No other man ever did so much for his country as he did. 

(b) People all over the world now speak of him as Alfred, the Great. 

(c) He was one of the greatest kings. 

(d) A king did not have a very easy life in those days.

(a) Snow leopards live in the high mountains of Asia. 

(b) Its scientific name is panthera uncia. 

(c) A full grown snow leopard is two meters long. 

(d) It likes to live by itself in a cave.

(a) The Indians regard the Ganga to be a holy river. 

(b) The source of the Ganga is in the Gangotri glacier. 

(c) It is joined by the Saraswati and the Yamuna to form the Triveni Sangam at Prayag. 

(d) It provides water to millions of people.

When a man jumps out of a boat to the bank of the river, he applies a force in the forward direction. Due to the reaction of this boat moves backward (i.e. away from the bank).

Because they have already been enposed to hepatitis. A virus through contaminated water and gone immune to it.

(a) When mixture of iron filling and sulphur is reated iron sulphide is obtained which is black in colour. 

(b) Iron does not get attracted to a magnet from a mixture of reated iron fillings and sulphur powder. 

(c) No reaction on carbon disulphide and mixture. 

(d) On adding dilute hydrochoride acid. The gas obtained is hydrogen sulphide (H₂S).

(i) It is colourless gas. 

(ii) It smells like rotten eggs.

(i) 298 k = 298 – 273 = 25ºC  

(ii) 300 k = 300 – 273 = 27ºC 

(iii)280 k = 280 – 273 = 7ºC