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Hydrogen Bonding

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Question

This question contains STATEMENT-I (Assertion) and STATEMENT-2 (Reason) and has 4 choices (a), (b), (c) and (d) out of which ONLY ONE is correct.
STATEMENT-I: p-Hydroxybenzoic acid has a lower boiling point than o-hydroxybenzoic acid.
STATEMENT-2: o-Hydroxybenzoic acid has a intramolecular hydrogen bond.

Statment-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1

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Statment-I is True, Statement-2 is True; Statement-2 is a NOT correct explanation for Statement-1

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Statement-1 is True, Statement-2 is False.

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Statement-1 is Flase, Statement-2 is True.

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Solution

The correct option is D Statement-1 is Flase, Statement-2 is True.
It is special type of dipole-dipole interaction between hydrogen atom bonded to strong electromagnetic atoms like Nitrogen, Oxygen, Flourine and Chlorine in a compound.

Intermolecular hydrogen bonding
Intramolecular hydrogen bonding
This occurs between H-atom of one molecule and an electronegative atom of other molecule.
This bond is formed between the hydrogen atom and a electromagnetic atom of same molecules.
Intermolecular hydrogen bond results into association of molecules. Hence, it usually increases boiling point.
Intramolecular hydrogen bond prevents association of molecules. Has no effect on physical properties.

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Statement A- Each atom of sodium is 23 times heavier than one atom of hydrogen.

Statement R- The atomic weight of sodium is 23 and hydrogen is 1.

Q. Each of these questions contains two statements, Statement 1(Assertion) and Statement 2(Reason).

Statement-I : If sum of n terms of a series is

6 n^{2} + 3 n + 1

, then the series is in A.P.

Statement-II : Sum of n terms of an A.P. is always of the form

a n^{2} + b n

, where

a

and

b

are constant.

State which of the following is correct :

(A) Statement-I is true, Statement-II is true ; Statement-II is correct explanation for Statement-I.
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[F e (H_{2} O)_{5} N O] S O_{4}

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[F e (H_{2} O)_{5} N O] S O_{4}

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Statement -I : The sum of

n

terms of two arithmetic progressions are in the ratio

(7 n + 1) : (4 n + 17)

, then the ratio of their

n^{t h}

terms is

7 : 4

Statement-II : If

S_{n} = a n^{2} + b n + c,

then

T_{n} = S_{n} - S_{n - 1}

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Intermolecular hydrogen bonding	Intramolecular hydrogen bonding
This occurs between H-atom of one molecule and an electronegative atom of other molecule.	This bond is formed between the hydrogen atom and a electromagnetic atom of same molecules.
Intermolecular hydrogen bond results into association of molecules. Hence, it usually increases boiling point.	Intramolecular hydrogen bond prevents association of molecules. Has no effect on physical properties.