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Задание 3. Перепишите предложения и прокомментируйте их 0,5 балла словами True (правильно) или False (неправильно) в (0,1×5) соответствии с содержанием текста.

1. Basov has never attended local schools in Voronezh. 2. In 1945 Basov entered the Moscow Institute of Physical Engineers. 3. Basov worked in the field of

optoelectronics. 4. Basov was the head of the laboratory of quantum radiophysics at

 

 

ЧАСТЬ II

 

АГНИ

the Moscow Institute of Physical Engineers. 5. He had two sons.

 

 

 

Задание 4. Переведите второй абзац письменно.

 

 

1 балл

 

Задание 5. Составьте резюме о себе на английском языке.

 

2 балла

 

 

 

 

 

 

 

 

Задание 1

 

Тема 1: Инфинитив, формы и функции.

ка

 

1,9 баллa

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

т

 

. (0,1×4)

 

 

 

о

 

 

a) Поставьте глагол в соответствующую форму инфинитивае

 

1. Laser can (to vaporize - Simple Infinitive Active)иany substance on the earth. 2. I have an idea (to go - Continuous Infinitive Active) to the disco. 3. There are a lot of difficulties (to encounter - Simple Infinitive Passive) on route. 4. Lasers (to place - Perfect Infinitive Passive) on Earth satellites will transform solar radiation into laser

beam.

 

бл

 

 

б) Переведите предложения с инф н т вом. (0,2×5)

 

и

1. You suppose that boy to be friendless.б

2. The surgeon pronounced the wound to be

a slight one. 3. Only yesterdayаяwe happened to see Mr. Bennet. 4. She is certain to be a fit wife for him. 5. There is nobody here for him to play with.

в) Выберите соответствующую форму инфинитива. (0,1×5)

 

 

 

ро

 

1. He is sure (keeps, to keep) his promise. 2. Tony seems not (to be, been) a

responsible person. 3.ннWill he (to buy, buy) this flat? 4. They are likely (to visit, visit)

you. 5. I have never heard her (to sing, sing).

 

 

кт

 

 

 

 

 

 

 

е

 

 

2,5 балла

 

Задание 2 Тема 2: Объектный инфинитивный оборот.

а) Переведите на русский язык предложения с объектным инфинитивным

оборотомл

. (0,2×10)

Model: I expect her to come tomorrow. - Я ожидаю, что она придет завтра.

Э

 

1. I felt somebody touch my shoulder. 2. He heard his sister play the piano. 3. I saw my friend read the book. 4. Sam didn’t want you to stay in the yard. 5. Jane expected Tom to invite her to the theatre. 6. Did you see anybody take this book? 7. He made the car run at full speed. 8. I’d like you to spend the summer with us. 9. I saw George walk down the street. 10. Did you notice him go away?

51

б) Составьте предложения, употребив объектный инфинитивный оборот. (0,1×5)

Model: I want (you, go) there. - I want you to go there.

1. I don’t like (she, prevent) me from doing it. 2. Parents always want (their children, be) the best. 3. I believe (Van Clibern, be) a great pianist. 4. He ordered (they, go away). 5. She simply made (I, tell) a lie.

 

 

 

 

Задание 3

Тема 3: Субъектный инфинитивный оборот.

 

АГНИ

 

3 балла

а) Переведите предложения с субъектным инфинитивным оборотом. (0,2×10)

Model: She is said to know several foreign languages. – Говорят, что она знает несколько иностранных языков.

excellent condition. 3. You appear to have found in himеsomethingка that I have missed. 4. This work is certain to take much time. 5. Theтoperation is reported to be a complicated one. 6. The new methods of work provedоto be very effective. 7. The percentage of carbon in this steel turned out to be low. 8. Mr. Worthing is supposed to be back soon. 9. These two young people are likely to be very good friends. 10.

1. The Hare turned out to be the loser of the race. 2. The apparatus seemed to be in

You are sure to be there tomorrow night, aren't you?и

б) Перефразируйте предложения, употре ив субъектный инфинитивный

оборот. (0,2×5)

 

бл

 

 

Model: It is said that they live in Moscow.и– They are said to live in Moscow.

It is known that he is a good man. – He is known to be a good man.

 

б

 

1. It is said that Peter is a talented journalist. 2. It is supposed that this derelict land

was a bustling town in the past. 3. It is thought that Steve was the person who was

guilty. 4. It is believed that Manchester United is the strongest team. 5. It was proved

that the beginning of the 17

thая

 

 

 

 

century was a hard time for Russia.

 

 

 

 

 

 

 

нн

 

 

 

 

 

Задание 4

 

Тема 4: Сослагательное наклонение.

 

2,6 балла

 

 

a) Переведи

 

рое на русский язык предложения с глаголом-

 

сказуемым в

 

 

 

 

 

сослагат льном наклонении. (0,2×10)

 

 

 

 

 

кт

 

 

 

 

 

1. If I were you I wouldn’t do it. 2. If I had enough money I would buy a house. 3.

 

е

 

 

 

 

 

They would be offended if I didn’t come. 4. If he sold his car he would receive a lot

 

л

 

 

 

 

 

 

 

 

of money. 5. What would you do if you lost your key? 6. It would be nice to go for a

Эjourney. 7. If I had read the lectures, I would have answered all the questions. 8. If you went to the seaside, you would have a wonderful time there. 9. Could you tell me where the supermarket is? 10. I’d like to thank you for your help.

б) Переведите на английский язык. (0,2×3)

Образец: 1. Жаль, что ее не было там. (Мне бы хотелось, чтобы она была там) –

I wish she had been there.

52

2.Жаль, что я не богат. ( Мне бы хотелось, чтобы я был богат) - I wish I were rich.

3.Жаль, что я не поеду в Нью-Йорк летом. (Я бы хотел узнать их решение) - I wish I would go to New York next summer.

1.Хотелось бы, не было так скучно

2.Хотелось бы, чтобы ты сделал что-нибудь.

3.Хотелось бы, чтобы вы прислали нам информацию в следующем письме.

ВАРИАНТ 13

ЧАСТЬ I

 

 

 

Задание 1. Прочтите текст и напишите ответы на вопросы.

1 балл

 

(0,2×5)

 

АГНИ

1. What was the first laser like? 2. When did the laser age begin? 3. What substances

possess laser qualities? 4. What are the most common uses of lasers? 5. Why are

lasers considered dangerous?

 

 

 

 

 

ка

 

 

 

 

е

 

 

 

 

 

 

TEXT

 

 

т

 

 

 

о

 

 

 

 

 

 

 

PAST AND FUTURE OF LASER

 

 

 

и

 

 

 

1. A laser is a source of light but unlike anything that had ever been seen before 1960

 

бл

 

 

 

 

when Theodore H. Maiman of Hughes Aircraft placed a specially prepared synthetic

ruby rod inside a powerful flash lamp similar to the type used for high-speed

 

б

photography. Activating the flash lampиproduced an intense pulse of red light which

possessed the unique properties of monochromicity (the light is of the same

ая

 

wavelength or colour), coherence (all the waves move precisely in step) and

directionality (the beam can be easily manipulated). These features account for the нн

enormous difference between the output of a laser and that of an incandescent light bulb.

2. With Maiman’s invention the laser age was born. Everybody became interested in exploring this promising area of science. Within a very short time numerous solid-

 

кт

state materials, gases, liquids and semiconductor crystals were found possessing laser

qualities. Almostроevery imaginable material was tried in order to produce new and

е

interesting lasers. Even some varieties of jelly brand dessert were announced emitting

л

 

xenon light and accordingly to this legend they are supposed to work fairly well.

Э3. In many ways the laser was a solution looking for a problem. The problems soon followed in great numbers. It would be hard to imagine the modern world without lasers. They are used in everything from CD players to laser printers, fibre-optics and free-space communications, industrial cutting and welding, medical and surgical treatment, holography and light shows, basic scientific investigations in dozens of fields including Star Wars weapons research. The unique characteristics of laser light make these and numerous other applications possible. In fact, it is safe to say that the vast majority of laser applications have not yet even been suggested.

53

4. However, if treated inadequately, an extremely powerful beam of laser light can be a source of destruction. You must never stand in the way of the cutting laser beam. Only by looking directly into the beam or its reflection from a shiny object you can damage your eyes. Besides, laser power supply being typically 2500 V or more, a qualified person must provide external power supply as ordinary insulation is not enough. Thus, no matter how advantageous and useful they are, lasers are dangerous. Hence, safety rules must be strictly observed.

 

 

 

Задание 2. Найдите в тексте английские эквиваленты.

 

АГНИ

 

0,5 балла

 

 

(0,1×5)

Синтетический рубиновый стержень; интенсивный импульс красного света; лампа накаливания; полупроводниковые кристаллы; медицинское и хирургическое лечение.

Задание 3. Перепишите предложения и прокомментируйте их

0,5 балла

словами True (правильно) или False (неправильно) в

(0,1×5)

соответствии с содержанием текста.

 

ка

 

е

 

 

 

 

 

 

т

 

 

 

1. Monochromicity means light of the same wavelength or colour. 2. Light waves

travelling precisely in step explain the property of directionality.о

3. It is impossible to

imagine the modern world without lasers. 4. The vast majority of laser applications

 

 

 

 

 

и

 

have not yet even been suggested. 5. If treated inadequately, an extremely powerful

beam of laser light can be a source of destruction.

 

 

 

 

 

 

бл

 

Задание 4. Переведите четвертыйиа зац письменно.

1 балл

 

 

 

 

б

 

 

Задание 5. Составьте резюме о себе на английском языке.

2 балла

 

 

 

ая

 

 

 

 

 

 

 

 

 

 

 

нн

 

ЧАСТЬ II

 

 

 

 

 

 

 

Задание 1

Тема 1: Инфинитив, формы и функции.

1,9 баллa

 

 

 

a) Поставь е глагол в соответствующую форму инфинитива. (0,1×4)

 

ро

 

 

 

 

 

1. Noise is also the problem (to face - Simple Infinitive Passive) by teachers at

 

кт

school. 2. She was not a woman (to suffer - Simple Infinitive Active) in silence. 3.

е

л

 

ЭThe man was so nervous (to face - Perfect Infinitive Active) danger. 4. It was pleasant (to swim - Continuous Infinitive Active) in the river.

б) Переведите предложения с инфинитивом. (0,2×5)

1. He is supposed to have been buried in Westminster Abbey. 2. She is likely to have the right of keeping the child. 3. He had a comfortable house for her to live in. 4. My friend intended me to go with him to India. 5. I want you not to go by yourself to the hotel.

54

в) Выберите соответствующую форму инфинитива. (0,1×5)

1. We hope (to buy, buy) a car. 2. You expected (get, to get) all information you need. 3. He doesn’t want (produce, to produce) these goods. 4. You want (use, to use) a new computer. 5. This robber deserves (to sent, to be sent) to prison.

Задание 2 Тема 2: Объектный инфинитивный оборот.

2,5 балла

 

 

 

АГНИ

а) Переведите на русский язык предложения с объектным инфинитивным

оборотом. (0,2×10)

 

Model: I expect her to come tomorrow. - Я ожидаю, что она придет завтра.

1. I expect you to stay at home. 2. We want our children to grow active .3. She heard somebody enter the room. 4. The rain made us stay at home. 5. I know your sister to be an excellent singer. 6. I saw her swim across the river. 7. Father likes me to speak

English. 8. He doesn’t like us to break our toys. 9. Would you like me to tell you this

story? 10. Bob noticed them hide something.

 

 

ка

 

 

 

 

 

 

 

е

б) Составьте предложения, употребив объектный инфинитивный оборот.

(0,1×5)

 

т

 

Model: I want (you, go) there. -

I want you to go there.о

 

 

 

бл

 

 

 

1. We like (our teacher, talk) to us. 2. I want (he, иleave) my house. 3. I expect (you,

join) our excursion. 4. Tim heard (someone, call) his name. 5. They know (you, be) a soft-hearted man.

 

Задание 3

 

и

 

3 балла

 

 

 

 

 

 

 

Тема 3: Субъектный инфинитивный оборот.

 

 

 

 

 

б

 

 

 

а) Переведите предложения с субъектным инфинитивным оборотом.

(0,2×10)

 

 

 

 

 

Model: She is said to knowаяseveral foreign languages. – Говорят, что она знает

несколько иностра ых языков.

 

 

 

1. He is sure to tell meннall about this even if I don't ask him. 2. When Sandra said that

arguing, we areроcertain to quarrel. 4. They are expected to acknowledge your talent. 5. He is likely to give us some useful information. 6. The article is unlikely to appear

they were sure to meet again, she saw Clyde's face suddenly brighten. 3. If we go on

in theеnextктissue of the journal. 7. They were supposed to come to an understanding. 8. Don't worry: everything is sure to turn out all right. 9. This new course of

Эtreatmentл proved to help your grandmother. 10. Many books are known to be published in our country every year.

б) Перефразируйте предложения, употребив субъектный инфинитивный оборот. (0,2×5)

Model: It is said that they live in Moscow. – They are said to live in Moscow. It is known that he is a good man. – He is known to be a good man.

55

A LETTER TO AN EXPERT
TEXT

1. It is reported that Sam is the smartest person in our firm. 2. It is said that Manchester United is the strongest team. 3. It is known that you support our idea. 4. It is considered that the house has two gardens. 5. It is supposed that there is a huge amount of natural resources in the ocean floor.

Задание 4

Тема 4: Сослагательное наклонение.

2,6 балла

 

 

 

now or tomorrow, he would do the work myself. 8. I'm so sorry I had АГНИno money with me yesterday, I would have bought that dress. 9. They would buy a new car but they

a) Переведите на русский язык предложения с глаголом-сказуемым в сослагательном наклонении. (0,2×10)

1. It would be silly to spend all night at the disco. 2. I’d like to meet a star. 3. You are

the only person I would listen to. 4. I could have done it in a different way. 5. He

would like to buy a new car. 6. She would like to join us. 7. If he had any free time

don’t have enough money. 10. Would you mind going to the market?

б) Переведите на английский язык. (0,2×3)

 

 

 

ка

 

 

 

 

 

 

 

 

 

 

Образец: 1. Жаль, что ее не было там. (Мне бы хотелось, чтобы она была там) –

I wish she had been there.

 

 

 

 

 

е

 

 

 

 

 

т

 

 

2.

 

 

 

 

 

 

 

Жаль, что я не богат. ( Мне бы хотелось, чтобы я был богат) - I wish I were

rich.

 

 

 

о

 

 

 

 

 

и

 

 

 

 

3.

 

 

 

 

 

 

 

Жаль, что я не поеду в Нью-Йорк летом. (Я бы хотел узнать их решение) - I

wish I would go to New York next summer.

 

 

 

 

 

 

1.

Хотелось бы, чтобы вы прекратили прерывать меня.

 

 

2.

 

 

 

бл

 

 

 

 

 

Жаль, что дождь не прекратился. Мы не гуляли.

 

 

 

 

3.

 

 

и

 

 

 

 

 

Хотелось бы, чтобы вы приехали в следующем году.

 

 

 

 

ая

б

 

 

 

 

 

 

 

 

ВАРИАНТ 14

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ЧАСТЬ I

 

 

 

 

 

 

 

Задание 1. Пр чтите текст и напишите ответы на вопросы.

1 балл

 

нн

 

 

 

 

 

 

 

(0,2×5)

 

ро

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.

What kind of a person do you choose as an expert? 2. What phrases do you start

your letter with? 3. Can an overly long introductory paragraph turn off your reader

 

 

кт

and cause her to set down the letter? 4. You conclude the letter by expressing your

 

е

л

 

Э

 

 

gratitude, don’t you? 5. Where do you put your contact information?

1. Consulting an expert within a field gives you the chance to benefit from her years of experience and likely skill. While you may not have the opportunity to meet face- to-face with an expert in your particular occupation or area of interest, you may be able to contact them via letter and ask for advice. To increase the chances that your

56

letter is met with a response, take care when composing your correspondence, creating one that is clear and professional.

Instructions:

2. Select an expert. Choose someone who is a leader in the industry about which you are trying to obtain knowledge, but also someone who is accessible. This may mean

selecting an expert who has not yet attained notoriety as this person may be easier to get into contact with than a more famous individual.

Keep this section short, only telling the expert the most basic informationАГНИabout yourself. Avoid rambling in this paragraph at all costs, as an overly long introductory paragraph could completely turn off your reader and cause her to set down the letter.

3. Open with a salutation. Start your letter with a polite "Dear" followed by the

individual's full name. Use a title such as "Mr." or "Ms." to add formality to your salutation.

4. Introduce yourself and explain your reason for writing briefly in the introduction.

5.

Pose specific questions in the second paragraph; come right out and say what you

 

ка

want. By posing specific questions instead of more generalеones, you can ensure that

the information you receive in response is specifically whatтyou were looking for.

6.

Conclude by expressing your gratitude. Conciselyоtell the letter recipient how

much you appreciate him taking the time to replyиto your correspondence, potentially

increasing the chances that he chooses to do so.

7. Provide contact information. Don't depend on your recipient to look at the

 

 

 

бл

envelope's return address for your contact information, but instead give it to her

 

 

и

 

 

б

 

directly, putting your address along with your email and phone number on the letter

itself.

ая

 

 

 

 

 

8. Add an appropriate closing and sign your name. Use a common "Sincerely" or "Yours Truly" as these are quite appropriate for people with whom you don't have a pre-existing relationship.

 

нн

 

 

 

 

Задание 2. Найдите в тексте английские эквиваленты.

0,5 балла

 

ро

(0,1×5)

 

 

Встретиться с экспертом лицом к лицу; самая основная информация о себе;

 

выразив признательность; потенциально увеличивая шансы; соответствующее

 

 

кт

 

 

 

 

зак ючение.

 

 

 

 

 

е

 

 

 

 

л

 

0,5 балла

 

 

 

 

 

Задание 3. Перепишите предложения и прокомментируйте

 

 

 

их словами True (правильно) или False (неправильно) в

 

(0,1×5)

 

Э

 

 

 

 

 

соответствии с содержанием текста.

 

 

 

 

 

 

 

 

 

1. If you may not have the opportunity to meet face-to-face with an expert, you may be able to contact them via letter. 2. Such titles as "Mr." or "Ms." are used to add formality to your salutation. 3. The most basic information about yourself is given in the conclusion. 4. You pose general questions in the second paragraph. 5. "Sincerely"

57

or "Yours Truly" are quite appropriate for people with whom you don't have a preexisting relationship.

Задание 4.

Переведите третий абзац письменно.

1

балл

 

 

 

 

 

Задание 5.

Составьте резюме на английском языке.

2

балла

 

 

 

 

 

 

 

 

 

 

 

 

ЧАСТЬ II

 

 

 

 

 

 

Задание 1

Тема 1: Инфинитив, формы и функции.

 

1,9 баллa

 

 

 

 

 

a) Поставьте глагол в соответствующую форму инфинитива. (0,1×4)

1. She ordered me (to drive - Simple Infinitive Active) back to her house. 2. This car

 

 

 

 

 

 

 

 

АГНИ

was the last (to repair - Perfect Infinitive Passive). 3. I have a little child (to look after

 

 

 

 

 

 

е

 

- Continuous Infinitive Active). 4. Laws were not made (to break - Simple Infinitive

Passive).

 

 

 

 

т

ка

 

 

 

 

 

о

 

 

 

б) Переведите предложения с инфинитивом. (0,2×5)

 

 

 

 

 

и

 

 

 

 

1. I dislike you to talk like that. 2. He hates her to be flogged. 3. The experiment

 

 

бл

 

 

 

 

 

proved to be a failure. 4. They all are likely to be good fighters. 5. He stepped aside

for me to pass.

и

 

 

 

 

 

 

 

нфинитива. (0,1×5)

 

в) Выберите соответствующую форму

 

 

б

 

 

 

 

 

 

 

1. I must remember (meet, to meet) him at the station. 2. Jake forgot (to buy, buy)

 

sweets for the son. 3. They stopped (to talk, talk) the matter over in detail. 4. Please,

 

 

 

 

 

 

ая

 

 

 

 

remember (posted, to post) the letter at the post office. 5. Mike refused (to pay, pay)

 

the bill.

 

 

 

 

 

 

 

 

Задание 2

 

Тема 2: Объектный инфинитивный оборот.

 

2,5 балла

 

 

а) Переведите

 

на русскийнн язык предложения с объектным

 

инфинитивным

 

 

 

 

 

 

оборотом. (0,2×10)

 

 

 

 

 

 

 

кт

 

 

 

 

 

Model: I expectроher to come tomorrow. - Я ожидаю, что она придет завтра.

 

 

е

 

 

 

 

 

1. I heard something heavy fall on the floor. 2. I want you to be more attentive. 3.

 

л

 

 

 

 

 

 

 

 

They expected us to take part in the discussion. 4. Did you see anybody leave the

Э

 

 

 

 

 

 

 

 

room? 5. Bad weather made us return home. 6. She didn’t hear me enter the room. 7. I know your father to be a clever man. 8. I felt somebody touch my hair. 9. He didn’t expect me to be late. 10. Grandfather likes Lena to play the piano.

б) Составьте предложения, употребив объектный инфинитивный оборот. (0,1×5)

Model: I want (you, go) there. - I want you to go there.

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1. I felt (the pain, become) less. 2. Mother doesn’t let (she, enter) the Institute. 3. What caused (he, do) so? 4. He will never allow (I, behave) in such a way. 5. He likes to watch (Ann, play) in the garden.

Задание 3

Тема 3: Субъектный инфинитивный оборот.

3 балла

 

 

 

а) Переведите предложения с субъектным инфинитивным оборотом.

(0,2×10)

АГНИ

 

Model: She is said to know several foreign languages. – Говорят, что она знает

несколько иностранных языков.

 

1. Many books are known to be published in our country every year. 2. His invention is considered to be of great importance. 3. For a long time the atom was thought to be invisible. 4. He was said to be one of the most promising nuclear physicists. 5. She appeared to be an excellent actress. 6. This work seems to take much time. 7. The percentage of carbon in this steel turned out to be low. 8. They are sure to

acknowledge your talent. 9. The article is likely to appear in the next issue of the

journal. 10. She is unlikely to change her opinion.

 

 

 

ка

 

 

 

 

е

б) Перефразируйте предложения, употребив субъек ный инфинитивный

оборот. (0,2×5)

 

 

т

 

 

о

 

 

 

 

 

 

 

и

 

 

 

Model: It is said that they live in Moscow. – They are said to live in Moscow.

It is known that he is a good man. – He is known to be a good man.

1. It is considered that climate there is very healthy. 2. It was reported that the

Chinese dancers were arriving next week. бл3. It is expected that the performance will

be a success. 4. It is said that the bookиis popular with both old and young. 5. It is

believed that the poem was written бby an unknown soldier.

 

 

 

 

Задание 4

 

ая

 

2,6 балла

 

 

 

 

 

 

Тема 4: Сосл г тельное наклонение.

 

 

 

 

 

 

 

 

 

a) Переведите

нн

глаголом-сказуемым в

а русский язык предложения с

 

ро

 

 

 

сослагательн м

акло ении. (0,2×10)

 

 

 

1. Would he tell me if he knew it? 2. If it stopped snowing I could go for a walk. 3. Would youктmind my opening the window? 4. If I hadn’t caught a cold I would have joined you. 5. Would you like to come with us? 6. Would you be so kind as to tell me how еto get to the theatre? 7. Why didn't you phone him yesterday? He would have helpedл you. 8. If I had had any free time yesterday, I should have done the work

Эmyself. 9. What would you do if you found a wallet on the street? 10. What would you do if you won a million?

б) Переведите на английский язык. (0,2×3)

Образец: 1. Жаль, что ее не было там. (Мне бы хотелось, чтобы она была там) –

I wish she had been there.

2. Жаль, что я не богат. ( Мне бы хотелось, чтобы я был богат) - I wish I were rich.

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Задание 1. Прочтите текст и напишите ответы на вопросы.
ЧАСТЬ I
ВАРИАНТ 15

3. Жаль, что я не поеду в Нью-Йорк летом. (Я бы хотел узнать их решение) - I wish I would go to New York next summer.

1.Хотелось бы, чтобы она не опаздывала.

2.Жаль, что вы не бросили курить.

3.Хотелось бы, чтобы Вы не опоздали на завтрашнее собрание.

1. What is petroleum? 2. What compounds does petroleum contain? АГНИ3. May oils be only colorless? 4. Where does natural gas occur? 5. Why do we define the condition

1 балл

(0,2×5)

of pressure and temperature at which natural gas is measured?

ка

 

 

 

TEXT

 

е

т

 

 

 

ABOUT OIL AND NATURAL GAS

 

 

о

 

 

1. Petroleum is a valuable raw material. It is a mixtureи of hydrocarbons. Analyses of

petroleum proved that it consist of carbon and hydrogen. There are also other

compounds, which contain oxygen, nitrogen and inorganic matter. The physical and

 

бл

chemical properties of different samples of petroleum are not uniform. These depend

и

on the composition of oil and presence of impurities.

б

 

composition and properties.аяThe colour of petroleum varies considerably. Some oils may be almost colourless, other – light yellow, red, green, brown and black.

2. Petroleum contains gaseous, liquid and solid hydrocarbons of different

3. The odour ofроcrudeннoil is also determined by its composition. The paraffines and napthenes give agreeable odours where as unsaturated hydrocarbons containing nitrogen compounds and sulphur cause the disagreeable odours.

4. Natural gas is a complex mixture of hydrocarbons and non-hydrocarbons. That

 

 

кт

exists as a gas at atmospheric conditions. It is inflammable and occurs in the earth’s

 

е

crust with or near accumulations of crude oil. Its principle component is methane.

л

 

Э

 

 

This is a compound, which is often found in nature in marshy places, so it is sometimes called “mash gas”. Also present in natural gas are smaller amounts of methane, propane, butane.

5. Any sample of natural gas is likely to contain one or more of the following components: water vapour, nitrogen, carbon dioxide, hydrogen sulphide, helium, carbon disulphide.

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