a-D-(+)-glucose and β-D-(+)-glucose are :
(1) enantiomers
(2) conformers
(3) epimers
(4) anomers
is:The correct statement regarding electrophile is
| 1. | Electrophile is a negatively charge species and can form a bond by accepting a pair of electrons from a nucleophile |
| 2. | Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from another electrophile |
| 3. | Electrophile can be either neutral or positively charged species and can form a bond by accepting a pair of electrons from a nucleophile |
| 4. | Electrophiles are generally neutral species and can form a bond by accepting a pair of electrons from a nucleophile |
Which of the following statements is true regarding the conformers of ethane?
| 1. | Bond angle remains the same but bond length changes. |
| 2. | Bond angle changes but bond length remains the same. |
| 3. | Both bond angle and bond length change. |
| 4. | Both bond angle and bond length remain the same. |
The IUPAC name of the compound
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
The correct order of acidity among the following is:
1. CH2=CH2 >CH≡CH > CH3C≡CH > CH3-CH3
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
The most suitable method of separation of 1:1 mixture of ortho and para-nitrophenols is
1. sublimation
2. chromatography
3. crystallisation
4. steam distillation
Which among the given molecules can exhibit tautomerisrn?
1. III Only
2. Both I and III
3. Both Iand II
4. Both II and III
The correct order of strengths of the carboxylic acids :-
(a) I>II>III
(b) II>III>I
(c) III>II>I
(d) lI>I>IlI
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