Catalysts And Addition Reactions For Alkenes

Question 1 of 19

1

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

Select one of the following:

Platinum catalyst
Nickel catalyst
Phosphoric acid catalyst.

Explanation

Question 2 of 19

5

Fill the blank spaces to complete the text.

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 .

Explanation

Question 3 of 19

1

Tick the answers which are addition reactions for alkenes.

Select one or more of the following:

Bromination
Hydrobromination
Hydration
Oxidation
Hydrogenation

Explanation

Question 4 of 19

1

Select from the dropdown lists to complete the text.

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.

Explanation

Question 5 of 19

1

Hydrobromination's colour change is browny red to colourless.

Select one of the following:

True
False

Explanation

Question 6 of 19

1

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

Select one of the following:

True
False

Explanation

Question 7 of 19

1

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

Select one of the following:

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

Explanation

Question 8 of 19

6

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

Drag and drop to complete the text.

adsorbed

weaken

break

New bonds form

Old bonds reform

deadsorb

Deabsorb

diffuse away

Explanation

Question 9 of 19

1

Catalyst poisons are what to the heterogeneous catalyst surface.

Select one of the following:

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

Explanation

Question 10 of 19

1

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

Select one of the following:

True
False

Explanation

Question 11 of 19

1

Which of the following definitions for heterogenous catalyst is correct?

Select one of the following:

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.

Explanation

Question 12 of 19

1

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

Select one of the following:

Induced dipole
Deduced dipole
Simple induced dipole

Explanation

Question 13 of 19

1

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

Select one of the following:

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

Explanation

Question 14 of 19

1

What does the dipole mean in a Br2 molecule

Select one of the following:

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.

Explanation

Question 15 of 19

2

Which of the following are electrophiles?

Select one or more of the following:

C+
Br-
H+

Explanation

Question 16 of 19

1

Fill the blank spaces to complete the text.

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.

Explanation

Question 17 of 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~

Drag an answer into the correct orange point.

Alkene

Induced dipole

Carbocation

Electrophile

Alkane

Bromination

Hydrogenation

Hydration

Hydrobromination

Explanation

Question 18 of 19

1

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

Select one of the following:

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

Explanation

Question 19 of 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).

Select one of the following:

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

	Created by Nathan Butler over 7 years ago

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

Catalysts And Addition Reactions For Alkenes

Question 1 of 19

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

Select one of the following:

Explanation

Question 2 of 19

Fill the blank spaces to complete the text.

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 .

Explanation

Question 3 of 19

Tick the answers which are addition reactions for alkenes.

Select one or more of the following:

Explanation

Question 4 of 19

Select from the dropdown lists to complete the text.

Explanation

Question 5 of 19

Hydrobromination's colour change is browny red to colourless.

Select one of the following:

Explanation

Question 6 of 19

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

Select one of the following:

Explanation

Question 7 of 19

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

Select one of the following:

Explanation

Question 8 of 19

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

Drag and drop to complete the text.

Explanation

Question 9 of 19

Catalyst poisons are what to the heterogeneous catalyst surface.

Select one of the following:

Explanation

Question 10 of 19

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

Select one of the following:

Explanation

Question 11 of 19

Which of the following definitions for heterogenous catalyst is correct?

Select one of the following:

Explanation

Question 12 of 19

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

Select one of the following:

Explanation

Question 13 of 19

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

Select one of the following:

Explanation

Question 14 of 19

What does the dipole mean in a Br2 molecule

Select one of the following:

Explanation

Question 15 of 19

Which of the following are electrophiles?

Select one or more of the following:

Explanation

Question 16 of 19

Fill the blank spaces to complete the text.

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.

Explanation

Question 17 of 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~

Drag an answer into the correct orange point.

Explanation

Question 18 of 19

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

Select one of the following:

Explanation

Question 19 of 19

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

Select one of the following:

Explanation

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~