Este documento proporciona una introducción a las preguntas en inglés. Explica que una pregunta se usa para obtener información de otros y consiste en una palabra interrogativa, un auxiliar, un sujeto, un verbo y un signo de interrogación. A continuación, define cada una de las palabras interrogativas (qué, quién, cuándo, dónde, cómo, de quién, cuál, por qué) y proporciona ejemplos de cómo se usan para formular preguntas.
M.Sc. Part II Sem IV
Heterocyclic compounds-II
Nomenclature of heterocyclic compounds of bicyclic/tricyclic (5-6
Membered) fused heterocycles (up to three hetero atoms). (Common, systematic (Hantzsch-Widman) and replacement nomenclature)
M.Sc. Part II Sem IV
Heterocyclic compounds-II
Nomenclature of heterocyclic compounds of bicyclic/tricyclic (5-6
Membered) fused heterocycles (up to three hetero atoms). (Common, systematic (Hantzsch-Widman) and replacement nomenclature)
Silicone polymers structure, prepartion, properties, uses
INORGANIC POLYMERS
Polymers containing inorganic and organic components are sometimes called hybrid polymers, and most so-called inorganic polymers are hybridpolymers. One of the best known examples is polydimethylsiloxane, otherwise known commonly as silicone rubber.
Of synthetic polymers whose backbone is made of repeating silicone to oxygen bonds (siloxane bonds) with organic side groups, such as methyl, phenyl or vinyl.The basic repeating unit became known as siloxane and the most common available silicone is polydimethylsiloxane
Organo-silicone polymers contain chains or network of alternating silicone and oxygen atoms in their structures ,that is exhibited in some natural silicone minerals
Polymeric molecules in silicones held together by weak van der waals force results, they are liquids of varying viscosity or gums or solids containing polymeric molecules which generally soluble in organic mediaHydrolysis of dichloro dimethyl silane (CH3)2SiCl2 gives long chain polymers.As there is active OH group at each end .The length of the chain increasing.so it is called chain building unit
properties
1.The si-o-si bond in silanes is shorter than the expected si-o-si bond as calculated from the their radii.This indicates that there is some ionic character in si-o bond due to which it becomes quite stable.
2.This the the reason for why polysiloxanes are thermally stable and do not decompose even upto 350-400`C.
1. Highly polar character of si-o bond and the ability of si to expand its valency shell by utilizing its d-orbitals renders polysiloxanes susceptible to attack by several reagents.
2.The siloxanes may undergo hydrolysis and alcoholysis at elevated temperature in the presence of strong acids and bases
to give silanols and alkaxysilanes .In general, the greater the extent of substitution on Si atom, the greater is the case of hydrolysis in the presence of acids and greater is the difficulty of hydrolysis in the presence of bases.
thankingyou
ESWARAN .M -inboxeswaran@gmail.com
more chemistry contents are available
1. pdf file on Termmate: https://www.termmate.com/rabia.aziz
2. YouTube: https://www.youtube.com/channel/UCKxWnNdskGHnZFS0h1QRTEA
3. Facebook: https://web.facebook.com/Chemist.Rabia.Aziz/
4. Blogger: https://chemistry-academy.blogspot.com/
Stereochemistry Assignment
This is the fourth slideshow in a series for Unit 4 VCE Environmental Science. It discusses the factors contributing to air pollution, the sources and sinks and the human and environmental health effects.
Silicone polymers structure, prepartion, properties, uses
INORGANIC POLYMERS
Polymers containing inorganic and organic components are sometimes called hybrid polymers, and most so-called inorganic polymers are hybridpolymers. One of the best known examples is polydimethylsiloxane, otherwise known commonly as silicone rubber.
Of synthetic polymers whose backbone is made of repeating silicone to oxygen bonds (siloxane bonds) with organic side groups, such as methyl, phenyl or vinyl.The basic repeating unit became known as siloxane and the most common available silicone is polydimethylsiloxane
Organo-silicone polymers contain chains or network of alternating silicone and oxygen atoms in their structures ,that is exhibited in some natural silicone minerals
Polymeric molecules in silicones held together by weak van der waals force results, they are liquids of varying viscosity or gums or solids containing polymeric molecules which generally soluble in organic mediaHydrolysis of dichloro dimethyl silane (CH3)2SiCl2 gives long chain polymers.As there is active OH group at each end .The length of the chain increasing.so it is called chain building unit
properties
1.The si-o-si bond in silanes is shorter than the expected si-o-si bond as calculated from the their radii.This indicates that there is some ionic character in si-o bond due to which it becomes quite stable.
2.This the the reason for why polysiloxanes are thermally stable and do not decompose even upto 350-400`C.
1. Highly polar character of si-o bond and the ability of si to expand its valency shell by utilizing its d-orbitals renders polysiloxanes susceptible to attack by several reagents.
2.The siloxanes may undergo hydrolysis and alcoholysis at elevated temperature in the presence of strong acids and bases
to give silanols and alkaxysilanes .In general, the greater the extent of substitution on Si atom, the greater is the case of hydrolysis in the presence of acids and greater is the difficulty of hydrolysis in the presence of bases.
thankingyou
ESWARAN .M -inboxeswaran@gmail.com
more chemistry contents are available
1. pdf file on Termmate: https://www.termmate.com/rabia.aziz
2. YouTube: https://www.youtube.com/channel/UCKxWnNdskGHnZFS0h1QRTEA
3. Facebook: https://web.facebook.com/Chemist.Rabia.Aziz/
4. Blogger: https://chemistry-academy.blogspot.com/
Stereochemistry Assignment
This is the fourth slideshow in a series for Unit 4 VCE Environmental Science. It discusses the factors contributing to air pollution, the sources and sinks and the human and environmental health effects.
SEMIOLOGIA DE HEMORRAGIAS DIGESTIVAS.pptxOsiris Urbano
Evaluación de principales hallazgos de la Historia Clínica utiles en la orientación diagnóstica de Hemorragia Digestiva en el abordaje inicial del paciente.
Ponencia en I SEMINARIO SOBRE LA APLICABILIDAD DE LA INTELIGENCIA ARTIFICIAL EN LA EDUCACIÓN SUPERIOR UNIVERSITARIA. 3 de junio de 2024. Facultad de Estudios Sociales y Trabajo, Universidad de Málaga.
2. INTRODUCTION
What is a question?
A question is a kind of sentence that we use when we
want to know or get some information from someone
else.
To create a question we need five basic data:
- WH Word
- Auxiliary
- subject
- Verb
- Question mark
In this lesson we will learn more about each of the
question words and we will also learn how to creat
questions (the structure).
3. STRUCTURE
What is the structure of a question?
WH word + auxiliary «DO» + subject + verb + complements + ?
WH word + auxiliary BE» + subject + ?
What do you do every day ?
When is your party ?
1
2
4. WHAT…?
We use WHAT when searching for specific information.
QUESTIONS TRANSLATION
WHAT
What did you do? ¿Qué hiciste?
What is your name? ¿Cómo te llamas?
What are you eating? ¿Qué estas comiendo?
What were you singing? ¿Qué estabas cantando?
What did you say? ¿Qué dijiste?
What are they watching? ¿Qué están viendo?
What will you drink? ¿Qué beberás?
5. WHO…?
We use WHO when we want to know the person we are
talking about.
QUESTIONS TRANSLATION
WHO
Who is she? ¿Quién es ella?
Who helped you? ¿Quién te ayudo?
Who is buying the milk? ¿Quién esta comprando la leche?
Who did you call? ¿A quién llamaste?
Who do you love? ¿A quién amas?
WHO+ verb + object + ?
WHO+ auxiliary «DO» + subject + verb + ?
6. WHEN…?
We use WHEN because we want to know the date, day
or hour of an event.
QUESTIONS TRANSLATION
WHEN
When is the meeting? ¿Cuándo es la junta?
When is the football game? ¿Cuándo es el partido de
futbol?
When did she say she was
coming?
¿Cuándo dijo que venía?
When is your birthday? ¿Cuándo es tu cumpleaños?
When do you go to the
gym?
¿Cuándo vas al gimnasío?
7. WHERE…?
We use WHERE because we want to know the place
where an event happens.
QUESTIONS TRANSLATION
WHERE
Where is the party? ¿Dónde es la fiesta?
Where are you going? ¿A dónde vas?
Where is the milk? ¿Dónde esta la leche?
Where is your mother? ¿Dónde esta tu madre?
Where do you study? ¿Dónde estudias?
Where are you from? ----- ¿De donde eres?
8. HOW…?
We use HOW when talking about state (mental and
physically) and funcionality.
QUESTIONS TRANSLATION
HOW
How are you? ¿Cómo estas?
How does this work? ¿Cómo funciona esto?
How was the party? ¿Cómo estuvo la fiesta?
How did you fix the TV? ¿Cómo arreglaste la tele?
How will you feel
tomorrow?
¿Cómo te sentirás mañana?
How often: Qué tan seguido… ----- How often do you
play soccer?
How old : Qué edad … ----- How old are you?
9. WHOSE…?
We use WHOSE when talking about the owner of
something.
QUESTIONS TRANSLATION
WHOSE
Whose car is this? ¿A quién le pertenece ese
coche?
Whose pen is that? ¿A quién le pertenece esa
pluma?
Whose dog is this? ¿De quién es este perro?
Whose house is that? ¿De quién es esa casa?
10. WHICH…?
We use WHICH when choosing between more
than one option.
QUESTIONS TRANSLATION
WHICH
Which color do you prefer? ¿Qué color prefieres?
Which car is yours? ¿Cuál de los coches es tuyo?
Which dress do you want
to buy?
¿Cuál de los vestidos
quieres comprar?
Which country do you like
more?
¿Qué país te gusta más?
11. WHY…?
We use WHY when wanting to know the reason
for something.
QUESTIONS TRANSLATION
WHY
Why are you crying? ¿Por qué estas llorando?
Why is she here? ¿Por qué esta aquí?
Why did you buy that? ¿Por qué compraste eso?
Why can’t you help me? ¿Por qué no me puedes
ayudar?
12. REVIEW
Las preguntas nos ayudan a investigar cierta información y para ello
debemos conocer el significado de cada una de las «WH words»:
What: Qué – para solicitar información
Who: Quién – para saber de quién estamos hablando (persona)
When : Cuando – para conocer fechas, horas o días.
Where: Donde – para saber en que lugar
How : Como – para saber el estado de algo o como funciona algo
Whose: De quién – para conocer el dueño
Which : Cual – cuando tenemos que escoger de más de una opción
Why: Por qué – cuando necesitamos la razón de algo
13. Créditos
Tecnológico nacional de México
Tecnológico de Estudios Superiores de
Cuautitlán Izcalli
Coordinación del Área de
Educación a Distancia