Home
Class 11
CHEMISTRY
Given below are two statements : one is ...

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : Dipole-dipole interactions are the only non-covalent interactions, resulting in hydrogen bond formation.
Reason R : Fluorine is the most electronegative element and hydrogen bonds in HF are symmetrical.
In the light of the above statements, choose the most appropriate answer from the options given below.

A

A is true R is false

B

Both A and Rare true and R is the correct explanation of A

C

A is false but R is true

D

Both A and R are true but R is NOT the correct explanation of A

Text Solution

Verified by Experts

The correct Answer is:
C
Assertion is incorrect since in hydrogen bonding, Dipole-dipole interactions are non-covalent but ion- dipole interaction can also result in H-bond formation. Reason is correct since F is most electronegative element and structure is

Symmetrical H-bonds are present.
Promotional Banner

Similar Questions

Explore conceptually related problems

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : A simple distillation can be used to separate a mixture of propanol and propanone. Reason (R) : Two liquids with a difference of more than 20^(@) C in their boiling points can be separated by simple distillations. In the light of the above statements, choose the most appropriate answer from the options given below :

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : For a simple microscope, the angular size of the object equals the angular size of the image. Reason R : Magnification is achieved as the small object can be kept much closer to the eye than 25 cm and hence it subtends a large angle. In the light of the above statements, choose the most appropriate answer from the options given below :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Treatment of bromine water with propene yields l-bromopropan-2-ol. Reason (R) : Attack of water on bromonium ion follows Markovnikov rule and results in l-bromopropan-2-ol. In the light of the above statements, choose the most appropriate answer from the options given below :

Given below are two statements : one is labelled as Assertion A and the other is labelled as Assertion A: An electron microscope can achieve better resolving power than an optical microscope. Reason R : The de Broglie's wavelength of the electrons emitted from an electron gun is much less than wavelength of visible light. In the light of the above statements, choose the correct answer from the options given below:

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Aluminium is extracted from bauxite by the electrolysis of molten mixture of Al_(2)O_(3) 3 with cryolite. Reason (R) : The oxidation state of Al in cryolite is + 3. In the light of the above statements, choose the most appropriate answer from the options given below:

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Hydrogen is the most abundatn element in the Universe, but it is not the most abundant gas in the troposphere . Reason R : Hydrogen is the lightest element . In the light of the above statements , choose the correct answer from the options given below :

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R: Assertion A: The H-O-H bond angle in water molecule is 104.5^(@) Reason R: The lone pair - lone pair repulsion of electrons is higher than the bond pair - bond pair repulsion. In the light of the above statements, choose the correct answer from the options given below:

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R ) : Assertion (A) : Synthesis of ethyl phenyl ether may be achieved by Williamson synthesis. Reason (R ) : Reaction of bromobenzene with sodium ethoxide yields ethyl phenyl ether. In the light of the above statements, choose the most appropriate answer from the options given below :

Given below are two statements one is labelled as Assertion A and the other is labelled as Reason R Assertion A : In TlI_(3) , isomorphous to CsI_(3) the metal is present in +1 oxidation state. Reason R: Tl metal has fourteen f electrons in the electronic configuration. In the light of the above statements, choose the most appropriate answer from the options given below:

Given below are two statements : Statement I : o-Nitrophenol is steam volatile due to intramolecular hydrogen bonding. Statement II : o-Nitrophenol has high melting due to hydrogen bonding. In the light of the above statements, choose the most appropriate answer from the options given below :