The appropriate reagent for the following transformation,

  is :

1. Zn(Hg),HCl

2. NH2NH2, OH-

3. H2/Ni

4. NaBH4

Subtopic:  Differentiation of Organic Compound |
 61%
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Which compound would give 5-keto-2-methyl hexanal upon ozonolysis?

1. 2.
3. 4.

Subtopic:  Aldehydes & Ketones |
 68%
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The reduction of an alkyne to alkene using Lindlar's catalyst results into:

1. Cis-addition of hydrogen atoms.

2. Trans-addition of hydrogen atoms.

3. A mixture obtained by cis- and trans-additions of hydrogen which are in equilibrium with each other.

4. A mixture obtained by cis- and trans-additions of hydrogen atoms which are not in equilibrium with each other.

Subtopic:  Differentiation of Organic Compound |
 67%
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Identify Z in the sequence:
\(\mathrm{CH}_ 3-\mathrm{CH}_2-\mathrm{CH}=\mathrm{CH}_2 \xrightarrow{\mathrm{HBr} / \mathrm{H}_2 \mathrm{O}_2} \mathrm{Y} \xrightarrow{\mathrm{C}_2 \mathrm{H}_5 \mathrm{O}^{-}\mathrm{Na}^{+}} \mathrm{Z} \)

1. 
2. 
3.  \( \mathrm{CH}_3-\left(\mathrm{CH}_2\right)_3-\mathrm{O}-\mathrm{CH}_2-\mathrm{CH}_3 \)
4.  \( \mathrm{CH}_3-\left(\mathrm{CH}_2\right)_4-\mathrm{O}-\mathrm{CH}_3 \)
Subtopic:  Ascending and Descending Series |
 73%
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Acetylene can be converted to higher alkyne using the following sequence of reactions:

(1) Na,RX

(2) RMg X,R X

(3) either of these two

(4) none of these

Subtopic:  Ascending and Descending Series |
 55%
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R-COOH→ RCH2OH. This mode of reduction can be effected only by:

1. NaBH4

2. KMnO4

3. LiAIH4

4. All of the above

Subtopic:  conversion chart for n to n carbon |
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Propene, CH3-CH=CH2 can be converted into 1-propanol by oxidation. Which set of reagents among the following is ideal to effect the conversion?

1. Alkaline KMnO4

2. B2H6 and alk. H2O2

3. O3/zinc dust

4. OsO4/CHCl3

Subtopic:  Differentiation of Organic Compound |
 78%
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CH3CH=CHCHO is oxidized to CH3CH=CHCOOH using:

1. Alkaline permanganate

2. Ammoniacal silver nitrate

3. Selenium dioxide

4. Osmium tetroxide

Subtopic:  Aldehydes & Ketones |
 56%
From NCERT
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An alkene, obtained by the dehydration of an alcohol(A), on ozonolysis gives two molecules of acetaldehyde for every molecule of alkene. the alcohol (A) is:

1. CH3CH2CH2OH

2. CH3CH2OH

3. CH3CH=CHCH2OH

4. CH3CH2CHIOHCH3

 

Subtopic:  Differentiation of Organic Compound |
 63%
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Propene on reaction with diazomethane in presence of UV radiations gives:

(1) cyclopropane

(2) methyl cyclopropane

(3) butane

(4) butene

Subtopic:  Ascending and Descending Series |
 66%
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