Catalysts And Addition Reactions For Alkenes

Pregunta 1 de 19

1

What catalyst is needed for the addition reaction of hydrogen to an alkene in a lab?

Selecciona una de las siguientes respuestas posibles:

Platinum catalyst
Nickel catalyst
Phosphoric acid catalyst.

Explicación

Pregunta 2 de 19

5

Rellena los espacios en blanco para completar el texto.

The product of this addition reaction is- 2,3-dibromobutane. Thus meaning the addition reaction is , This requires temperature and pressure. A colour change can be seen when this reaction occurs. The solution changes from to . This is commonly known as the test for .

Explicación

Pregunta 3 de 19

1

Tick the answers which are addition reactions for alkenes.

Selecciona una o más de las siguientes respuestas posibles:

Bromination
Hydrobromination
Hydration
Oxidation
Hydrogenation

Explicación

Pregunta 4 de 19

1

Selecciona la opción correcta de los menús desplegables para completar el texto.

The hydration process in a lab is as follows...
The alkene is ( heated under reflux, heated under high temperature, heated under low pressure ) then ( concentrated sulfuric acid, concentrated nitric acid, concentrated hydrochloric acid ) is added. Finally ( water, hydroxide ions, hydrated salt, such as NaCl.XH2O ) is added, which attaches to the alkene.

Explicación

Pregunta 5 de 19

1

Hydrobromination's colour change is browny red to colourless.

Selecciona uno de los siguientes:

VERDADERO
FALSO

Explicación

Pregunta 6 de 19

1

The hydration addition reaction in an alkene in the industry is completed under high temperature and pressure.

Selecciona uno de los siguientes:

VERDADERO
FALSO

Explicación

Pregunta 7 de 19

1

This specific addition reaction involves a nickel catalyst and high temperature and pressure. Which addition reaction is it?

Selecciona una de las siguientes respuestas posibles:

Hydrogenation (Industry)
Hydrogenation (Lab)
Hydration (Lab)
Hydration (Industry)

Explicación

Pregunta 8 de 19

6

A heterogenous catalyst (step by step)-
Reactants get ❌ to surface. Bonds ❌ and ❌. ❌ between products. Products ❌ from surfac (❌).

Arrastra y suelta para completar el texto.

adsorbed

weaken

break

New bonds form

Old bonds reform

deadsorb

Deabsorb

diffuse away

Explicación

Pregunta 9 de 19

1

Catalyst poisons are what to the heterogeneous catalyst surface.

Selecciona una de las siguientes respuestas posibles:

Irreversibly adsorbed.
Engulfed by surface.
Adsorbed and stain surface before deadsorbtion.

Explicación

Pregunta 10 de 19

1

Catalyst poisons increase the surface area for reactants to attach to.

Selecciona uno de los siguientes:

VERDADERO
FALSO

Explicación

Pregunta 11 de 19

1

Which of the following definitions for heterogenous catalyst is correct?

Selecciona una de las siguientes respuestas posibles:

A catalyst is a substance which speed up the rate of the reaction by lowering the activation energy. The catalyst itself is not used up in the reaction. Heterogenous means the catalyst is at a different state to the reactants. For example in a catalytic converter the catalyst is solid whereas the reactants are gases.
A catalyst is a substance which speed up the rate of the reaction by lowering the activation energy. The catalyst itself is not used up in the reaction. Heterogenous means the catalyst is at the same state to the reactants. For example in a catalytic converter the catalyst is solid whereas the reactants are gases.
A catalyst is a substance which speed up the rate of the reaction by highering the activation energy. The catalyst itself is used up in the reaction. Heterogenous means the catalyst is at a different state to the reactants. For example in a catalytic converter the catalyst is solid whereas the reactants are gases.
A catalyst is a substance which slows down the rate of the reaction by lowering the activation energy. The catalyst itself is not used up in the reaction. Heterogenous means the catalyst is at a different state to the reactants. For example in a catalytic converter the catalyst is solid and the reactants are also solids.

Explicación

Pregunta 12 de 19

1

What is set up in a Br2 molecule when it comes into close proximity with an alkene?

Selecciona una de las siguientes respuestas posibles:

Induced dipole
Deduced dipole
Simple induced dipole

Explicación

Pregunta 13 de 19

1

Why is a dipole set up in in a Br2 molecule when it comes into close proximity with an alkene?

Selecciona una de las siguientes respuestas posibles:

Due to the high electron density in the C=C of the alkene.
Due to the high electron density in the C-H of the alkene.
Due to the trend in reactivity between a halogen and a carbon atom

Explicación

Pregunta 14 de 19

1

What does the dipole mean in a Br2 molecule

Selecciona una de las siguientes respuestas posibles:

The electrons shared between the Br2 move closer to the furthest Br from the alkene. Forming two areas of charge.
The covalent bond in the C=C and donates an electron pair to the Br2.
Lone pairs in the Br2 molecule closest to the alkene are forced towards the covalent bond causing the molecule to split into two Br- ions.

Explicación

Pregunta 15 de 19

2

Which of the following are electrophiles?

Selecciona una o más de las siguientes respuestas posibles:

C+
Br-
H+

Explicación

Pregunta 16 de 19

1

Rellena los espacios en blanco para completar el texto.

An electrophile is a species, which is either a ion or has a charged element. An electrophile is attracted to an area of . For example, the C= double bond.

Explicación

Pregunta 17 de 19

6

Label the electrophillic addition mechanism diagram below.
~The label in the corner, is there for you to name which addition reaction the mechanism is showing~

Arrastra la opción correcta a cada uno de los puntos naranjas

Alkene

Induced dipole

Carbocation

Electrophile

Alkane

Bromination

Hydrogenation

Hydration

Hydrobromination

Explicación

Pregunta 18 de 19

1

A full headed curly arrow, in the annotation of an electrophillic addition mechanism, means what?

Selecciona una de las siguientes respuestas posibles:

The movement of a pair of electrons
The movement of an electron
Specifically the movement of charge

Explicación

Pregunta 19 de 19

1

What ions are formed after the addition of Br? (Hint only one Br out of the Br2 has bonded to the organic molecule).

Selecciona una de las siguientes respuestas posibles:

Br- and C+
Br+ and C-
Br+ and C+
Br- and C-

	Creado por Nathan Butler hace más de 7 años

Quiz on Untitled, created by Nathan Butler on 22/02/2017.

Catalysts And Addition Reactions For Alkenes

Pregunta 1 de 19

What catalyst is needed for the addition reaction of hydrogen to an alkene in a lab?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 2 de 19

Rellena los espacios en blanco para completar el texto.

The product of this addition reaction is- 2,3-dibromobutane. Thus meaning the addition reaction is , This requires temperature and pressure. A colour change can be seen when this reaction occurs. The solution changes from to . This is commonly known as the test for .

Explicación

Pregunta 3 de 19

Tick the answers which are addition reactions for alkenes.

Selecciona una o más de las siguientes respuestas posibles:

Explicación

Pregunta 4 de 19

Selecciona la opción correcta de los menús desplegables para completar el texto.

Explicación

Pregunta 5 de 19

Hydrobromination's colour change is browny red to colourless.

Selecciona uno de los siguientes:

Explicación

Pregunta 6 de 19

The hydration addition reaction in an alkene in the industry is completed under high temperature and pressure.

Selecciona uno de los siguientes:

Explicación

Pregunta 7 de 19

This specific addition reaction involves a nickel catalyst and high temperature and pressure. Which addition reaction is it?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 8 de 19

A heterogenous catalyst (step by step)- Reactants get ❌ to surface. Bonds ❌ and ❌. ❌ between products. Products ❌ from surfac (❌).

Arrastra y suelta para completar el texto.

Explicación

Pregunta 9 de 19

Catalyst poisons are what to the heterogeneous catalyst surface.

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 10 de 19

Catalyst poisons increase the surface area for reactants to attach to.

Selecciona uno de los siguientes:

Explicación

Pregunta 11 de 19

Which of the following definitions for heterogenous catalyst is correct?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 12 de 19

What is set up in a Br2 molecule when it comes into close proximity with an alkene?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 13 de 19

Why is a dipole set up in in a Br2 molecule when it comes into close proximity with an alkene?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 14 de 19

What does the dipole mean in a Br2 molecule

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 15 de 19

Which of the following are electrophiles?

Selecciona una o más de las siguientes respuestas posibles:

Explicación

Pregunta 16 de 19

Rellena los espacios en blanco para completar el texto.

An electrophile is a species, which is either a ion or has a charged element. An electrophile is attracted to an area of . For example, the C= double bond.

Explicación

Pregunta 17 de 19

Label the electrophillic addition mechanism diagram below. ~The label in the corner, is there for you to name which addition reaction the mechanism is showing~

Arrastra la opción correcta a cada uno de los puntos naranjas

Explicación

Pregunta 18 de 19

A full headed curly arrow, in the annotation of an electrophillic addition mechanism, means what?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 19 de 19

What ions are formed after the addition of Br? (Hint only one Br out of the Br2 has bonded to the organic molecule).

Selecciona una de las siguientes respuestas posibles:

Explicación

A heterogenous catalyst (step by step)-
Reactants get ❌ to surface. Bonds ❌ and ❌. ❌ between products. Products ❌ from surfac (❌).

Label the electrophillic addition mechanism diagram below.
~The label in the corner, is there for you to name which addition reaction the mechanism is showing~