Home
Class 12
CHEMISTRY
(A): Noble gases are lower melting point...

(A): Noble gases are lower melting points and boiling points
(R): Noble gases posses weak dispersion forces.

A

a. Both A & R are true, R is the correct explanation of A

B

b. Both A & R are true, R is not correct explanation of A

C

c. A is true, R is false

D

d. A is false, R is true

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the assertion and reason about noble gases, we can break it down into a step-by-step analysis: ### Step 1: Understand the Assertion The assertion states that "Noble gases have lower melting points and boiling points." - Noble gases, which include helium, neon, argon, krypton, xenon, and radon, are known for their low melting and boiling points compared to other elements. ### Step 2: Understand the Reason The reason provided is that "Noble gases possess weak dispersion forces." - Dispersion forces, also known as London dispersion forces, are a type of Van der Waals force that arise due to temporary fluctuations in electron density in atoms or molecules, leading to temporary dipoles. ### Step 3: Connect the Assertion and Reason - Noble gases are monoatomic and do not form bonds with other atoms. The only forces acting between noble gas atoms are weak dispersion forces. - Because these dispersion forces are weak, they do not require much energy to overcome, resulting in low melting and boiling points for noble gases. ### Step 4: Determine the Truth of the Statements - Both the assertion and the reason are true. - The reason correctly explains why noble gases have low melting and boiling points due to the presence of weak dispersion forces. ### Conclusion Based on the analysis: - The assertion is true. - The reason is true and provides a correct explanation for the assertion. ### Final Answer Both the assertion and reason are true, and the reason is the correct explanation of the assertion.
Promotional Banner

Similar Questions

Explore conceptually related problems

Noble gases have very low melting and boiling points because.

Why do noble gases have low boiling points ?

Noble gases are parmagnetic in nature.

Boiling point and melting point of noble gases are in the order

Statement-1 :Noble gases have very low boiling points. Statement-2 : Noble gases being monoatomic have weak dispersion interatomic forces.

What is the order of boiling point of noble gases?

The noble gases have closed-shell electronic cordigaration and are monatomic gases under normal condition .The low bolling points of the ligher noble gases aree due to the weak dispersion points of the ligher noble gases an due to the weak dispersion forces between the atoms and the alsence of other interalumic interactions. The direct reaction of xenon with flarine loads to a series of compounds with water oxidation number +2, - 4 and +6, XeF_(4) reactsviolenatly with water to give XeO_(2) .The compound of deduced axbibt nci strouchemistry and their goometries can be deduced considering the total number of electron puirs in the valence shell. Argon is used in arc welding because of its

The noble gases have closed-shell electronic configuration and are monatomic gases under normal condition .The low bolling points of the ligher noble gases aree due to the weak dispersion points of the ligher noble gases an due to the weak dispersion forces between the atoms and the alsence of other interalumic interactions. The direct reaction of xenon with flarine loads to a series of compounds with water oxidation number +2, - 4 and +6, XeF_(4) reactsviolenatly with water to give XeO_(2) .The compound of deduced axbibt nci strouchemistry and their goometries can be deduced considering the total number of electron puirs in the valence shell. The structure of XeO_(3) is

The noble gases have closed-shell electronic configuration and are monoatomic gases under normal conditions. The low boiling points of the lighter noble gases are due to weak dispersion forces between the atoms and the absence of other Interatomic Interactions. The direct reaction of xenon with fluorine leads to a series of compounds with oxidation numbers +2,+4 and +6. XeF_4 reacts violently with water to give XeO_3 The compound of xenon exhibit rich stereochemistry and their geometries can be deduced considering the total number of electron pairs in the valence shell. Argon is used In arc welding because of its:

Noble gases do not accur in …..