The correct order with respect to –I effect of the substituents is-
(R = alkyl)
1. -NH2 > - OR < - F
2. -NR2 < -OR < - F
3. -NH2 > - OR > - F
4. -NR2 > - OR > - F

Subtopic:  Electron Displacement Effects |
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Which of the following carbocations is expected to be most stable?

1. 

2. 

3. 

4. 

Subtopic:  Electron Displacement Effects |
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The IUPAC name of the above mentioned compound is - 

1. 3-Ket-2-methylhex-4-enal

2. 5-Formylhex-2-en-3-one

3. 5-Methyl-4-oxohex-2-en-5-al

4. 3-Keto-2-methylhex-4-enal

Subtopic:  Nomenclature |
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With respect to the conformers of ethane, which of the following statements is true?

(1) Bond angle remains same but bond length changes

(2) Bond angle changes but bond length remains same

(3) Both bond angle and bond length change

(4) Both bond angles and bond length remain same

Subtopic:  Conformational Isomers |
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The IUPAC name of the compound

is-

1. 3-Keto-2-methylhex-4-enal

2. 5-Formylhex-2-en-3-one

3. 5-Methyl-4-oxohex-2-en-5-al

4. 3-Keto-2-methylhex-5-enal

 

 

Subtopic:  Nomenclature |
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The correct order of acidity among the following is-

1. CH2=CH2 > CH3-CH=CH2 > CH3C≡CH > CH≡CH

2. CH≡CH > CH3-C≡CH > CH2=CH2 > CH3 CH3

3. CH≡CH > CH2=CH2 > CH3-C≡CH > CH3-CH3

4. CH3-CH3 > CH2=CH2 > CH3-C≡CH > CH≡CH

Subtopic:  Acidic & Basic Character |
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The most suitable method used for the separation of 1:1 mixture of ortho and para-nitrophenols is-
1. Chromatography
2. Crystallization
3. Steam distillation
4. Sublimation

Subtopic:  Qualitative Analysis of Organic Compounds |
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The IUPAC name of the compound     is:

1. 5-formylhex-2-en-3-one
2. 5-methyl-4-2-en-5-el
3. 3-keto-2-methylhex-5-enal
4. 3-keto-2-methylhex-4-enal

Subtopic:  Nomenclature |
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The correct statement regarding electrophile is -­

1. Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from another electrophile

2. Electrophiles are generally neutral species and can form a bond by accepting a pair of electrons from a nucleophile

3. Electrophiles can be either neutral or positively charged species and can form a bond accepting a pair of electrons from a nucleophile

4. Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from a nucleophile

Subtopic:  Nucleophile & Electrophile |
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In pyrrole,

The electron density is maximum on

1. 2 and 3         2. 3 and 4

3. 2 and 4         4. 2 and 5

Subtopic:  Electron Displacement Effects |
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