Acidic Nature vs Percentage S Characters
Trending Questions
Q. Arrange the following compounds in decreasing order of reactivity for hydrolysis reaction.
I. PhCH2Br
II. Ph−Br|CH−CH2CH3
III.![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1208524/original_cajhad.png)
IV.![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1073056/original_154.png)
I. PhCH2Br
II. Ph−Br|CH−CH2CH3
III.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1208524/original_cajhad.png)
IV.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1073056/original_154.png)
- I > II > III > IV
- IV > II > I > III
- III > IV > II > I
- IV > III > II > I
Q. The increasing order of reactivity of the following halides for the SN1 reaction is
(I).CH3CH(Cl)CH2CH3
(II).CH3CH2CH2Cl
(III).p−H3CO−C6H4−CH2Cl
(I).CH3CH(Cl)CH2CH3
(II).CH3CH2CH2Cl
(III).p−H3CO−C6H4−CH2Cl
- (III)<(II)<(I)
- (II)<(I)<(III)
- (I)<(III)<(II)
- (II)<(III)<(I)
Q. Acetylenic hydrogens are acidic because
- sigma electron density of C - H bond in acetylene is nearer to carbon, which has 50% s-character
- acetylene has only open hydrogen in each carbon
- acetylene contains least number of hydrogens among the possible hydrocarbons having two carbons
- Acetylene belongs to the class of alkynes with molecular formula, CnH2n−2.
Q. Which of the following alkynes is most acidic?
- CH3C≡CH
- CH3C≡CCH3
- CH≡CH
- CH3CH2C≡CH
Q. Which of the following alkyl halide is more reactive towards E1 reaction?
- CH3−Cl
Q.
Which of the following does not give ions in aqueous solution?
Q. ![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1696937/original_623648_1.png)
Among these compounds, the correct order of resonance energy is
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1696937/original_623648_1.png)
Among these compounds, the correct order of resonance energy is
- I > II > III
- III > II > I
- II > III > I
- II > I > III
Q. The most acidic hydrogen is present in :
- Ethyne
- Ethene
- Benzene
- Ethane
Q.
Why in ethene angle between carbon hydrogen bonds is slightly less than angle between carbon hydrogen and carbon carbon Bond?
Q. The number of acidic hydrogen atoms in 1-butyne and 2-butyne is respectively.
- 1, 1
- 1, 2
- 1, 0
- 0, 1
Q. Choose the correct order of acidic strength:
1. Propane
2. Prop-1-ene
3. Prop-1-yne
1. Propane
2. Prop-1-ene
3. Prop-1-yne
- Propane > Prop-1-ene > Prop-1-yne
- Prop-1-yne > Prop-1-ene > Propane
- Prop-1-ene> Propane > Prop-1-yne
- Propane = Prop-1-ene = Prop-1-yne
Q.
The major product in the following reactions is
Q. Which of the following reaction will not be favourable in the forward direction?
- CH3ONa+CH3COOH→CH3OH+CH3COONa
- PhONa+NH3→PhOH+NaNH2
- HC≡CH+NaNH2→HC≡CNa+NH3
- HCOOH+PhONa→HCOONa+PhOH
Q.
Whether the conjugate base of is or not. Explain why?
Q. Which of the following alkynes is least acidic?
- CH3C≡CCH3
- CH3C≡CH
- CH3CH2C≡CH
- CH≡CH
Q. Identify the product(s) obtained when hot hydrogen iodide react with benzyl ethyl ether at high temperature?
- Ethanol
- Benzyl iodide
- Ethyl iodide
- Phenol
Q.
Which of the following Carboxylic acid donot undergo decarboxylation on heating?
Q. Which of the following acidity order is correct?
- 1-Alkyne > Alkene > Alkane
- Alkene > Alkane > 1-Alkyne
- Alkane > Alkene > 1-Alkyne
- None of these
Q. Arrange the following in decreasing order of basic strength :
![](https://search-static.byjusweb.com/question-images/byjus/ckeditor_assets/pictures/1021860/original_asx.JPG)
- B>C>A
- C>B>A
- A>C>B
- A>B>C
Q. Which of the follwing acidity order is correct?
- 1-Alkyne > Alkene > Alkane
- None of these
- Alkene > Alkane > 1-Alkyne
- Alkane > Alkene > 1-Alkyne
Q. β− Elimination or anti-elimination reaction is carried out with base (B⊖) as shown.
The following bases are used,
(I) ⊖OH(II) RO⊖(III) RCOO⊖(IV) ⊖CN(V) NO⊖3
The decreasing order of reactivity for the above elimination is :
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1327013/original_D4.png)
(I) ⊖OH(II) RO⊖(III) RCOO⊖(IV) ⊖CN(V) NO⊖3
The decreasing order of reactivity for the above elimination is :
- (II)>(I)>(IV)>(III)>(V)
- (V)>(III)>(IV)>(I)>(II)
- (II)>(I)>(III)>(IV)>(V)
- (I)>(II)>(III)>(IV)>(V)
Q. Assertion :Due to ortho effect basic nature of aniline decreases. Reason: It is due to steric hindrance because of solvation of cation.
- Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
- Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
- Assertion is correct but Reason is incorrect
- Both Assertion and Reason are incorrect
Q. Which reagent can be used to distinguish between 1-butyne and 2-butyne?
- alc.KOH
- alc.KMnO4
- Br2 water
- Ag+
Q. Consider the following Carbocations :
I) C6H5←CH2
II) C6H5←CH2CH2
III) C6H5←CH←CH3
IV) C6H5←C(CH3)2
I) C6H5←CH2
II) C6H5←CH2CH2
III) C6H5←CH←CH3
IV) C6H5←C(CH3)2
- I>II>III>IV
- II>I>III>IV
- IV>III>II>I
- IV>III>I>II
Q. Which of the following alkyl halide is more reactive towards E1 reaction?
- CH3−Cl
Q.
(1) 1−butene (2) butane
(3) 1−butyne (4) NH3
Rank the above compounds with rescept to increasing acidity:- 4 < 3 < 1 < 2
- 2 < 1 < 4 < 3
- 2 < 1 < 3 < 4
- 3 < 1 < 2 < 4
Q. Which of the following molecules does not posses a permanent electric dipole moment ?
- H2S
- SO2
- SO3
- CS2
Q. What happens to the bond length of CO Bond in an alcohol(R-OH) and an ether(ROR) as the size of R(alkyl) group increases?
Q. Arrange the following free radicals in order of decreasing stability :
Methyl (I), Vinyl (II), Allyl (III), Benzyl (IV)
- II>I>IV>III
- III>II>I>IV
- I>II>III>IV
- IV>III>I>II.
Q. Which one is the correct order of acidity ?
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- CH≡CH>CH2=CH2>CH3−C≡CH>CH3−CH3
- CH≡CH>CH3−C≡CH>CH2=CH2>CH3−CH3
- CH3−CH3>CH2=CH2>CH3−C=CH>CH≡CH
- CH2=CH2>CH3−CH=CH2>CH3−C≡CH>CH≡CH