CameraIcon

SearchIcon

MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Fluorination

Direct Fluori...

Question

Direct Fluorination of methane is a laboratory is Violently explosive. This is because the chain - initiation and Chain -Propagation steps are highly exothermic

A

True

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

False

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is B
False

The overall heat of reaction in the chain propagation step is highly exothermic.

But, the chain initiation step for all of $F_{2}, C l_{2}, B r_{2} a n d l_{2}$ are endothermic

$F_{2} ⟶ 2 \cdot F △ H^{\circ} = + 159 k J . m o l^{- 1}$

$C l_{2} ⟶ 2 \cdot C l △ H^{\circ} = + 243 k J . m o l^{- 1}$

$B r_{2} ⟶ 2 \cdot B r △ H^{\circ} = + 193 k J . m o l^{- 1}$

$I_{2} ⟶ 2 \cdot I △ H^{\circ} = + 151 k J . m o l^{- 1}$

Suggest Corrections

thumbs-up

0

Similar questions

Q. Which of the following is the chain propagation step in chlorination of methane?

Q. Arrange the following steps as they occur (first to last) during the free radical mechanism of polymer formation I. Chain propagation II. Chain initiation III. Chain termination

Fluorination of Methane can be controlled in a Laboratory setup - True or False?

Q. Halogenation takes place by free-radical mechanism. The values of

E

for chain initiation and chain propagation steps and enthalpy of overall reaction of halogens with alkane are given. Match the values with the type of halogens.

Q. Which of the statements is/are true about the reactivity order of halogens

F_{2} > C l_{2} > B r_{2} > I_{2} .

I. Lower the activation energy for the chain initiation step, more reactive is the halogen.
II. Lower the activation energy for the first chain propagation step, more reactive is the halogen.
III. More negative is the overall heat of the reaction

(Δ H_{r})

of halogenation of alkane, more reactive is the halogen.
IV. Lower the activation energy for the second chain-propagation step, more reactive is the halogen.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Alkanes - Chemical Properties

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Standard XII Chemistry

Join BYJU'S Learning Program

CrossIcon