Chemistry-
General
Easy
Question
The appropriate reagent for the following transformation.
- Zn(Hg), HCl
- NH2 – NH2 – OH–
- H2/Ni
- NaBH4
The correct answer is: NH2 – NH2 – OH–
The Wolf Kishner reduction takes place in strongly basic condition and can be used for the compounds which are sensitive to acid.
Related Questions to study
Chemistry-
Hydrogenation of the above compound in the presence of poisoned palladium catalyst gives
Hydrogenation of the above compound in the presence of poisoned palladium catalyst gives
Chemistry-General
Chemistry-
The products obtained via oximercuration (HgSO4 + H2SO4) of 1-butyne would be
The products obtained via oximercuration (HgSO4 + H2SO4) of 1-butyne would be
Chemistry-General
Chemistry-
Terepthalic acid is obtained by oxidation of which of following compounds ?
Terepthalic acid is obtained by oxidation of which of following compounds ?
Chemistry-General
Chemistry-
pH, of a buffer solution decrease by 0.02 units when 0.12 g of acetic acid is added to 250 mL of a buffer solution of acetic acid and potassium acetate at 
The buffer capacity of the solution is:
pH, of a buffer solution decrease by 0.02 units when 0.12 g of acetic acid is added to 250 mL of a buffer solution of acetic acid and potassium acetate at The buffer capacity of the solution is:
Chemistry-General
Chemistry-
If the Kb value in the hydrolysis reaction 
is 1.0 x 10-6, then the hydrolysis constant of the salt would be:
If the Kb value in the hydrolysis reaction is 1.0 x 10-6, then the hydrolysis constant of the salt would be:
Chemistry-General
Chemistry-
The solubility of mercurous chloride in water will be given as:
The solubility of mercurous chloride in water will be given as:
Chemistry-General
Chemistry-
Electrophiles are :
Electrophiles are :
Chemistry-General
Chemistry-
Hydrogenation of alkenes and alkynes takes place in presence of certain catalysts. In Sabatier Senderen’s reaction, the addition of hydrogen takes place in presence of Raney nickel catalyst. Platinum and palladium can also be used catalyst in these reactions. These are heterogeneous catalyst and used in finely divided state. Experimentally, it is observed that less crowded alkenes absorb H2 with faster rate. Controlled hydrogenation of alkyne in presence of Lindlar’s catalyst yields cis product i.e., ‘cis’ alkene. Thus, in presence of Lindlar’s catalyst ‘syn’ addition takes place. The relative rate of hydrogenation follows the order
Non-terminal alkynes are reduced in presence of Na or Li metal dissolved in liquid ammonia. In this reaction, anti-addition of hydrogen results into the trans-product.
The product of the following reaction is :
Hydrogenation of alkenes and alkynes takes place in presence of certain catalysts. In Sabatier Senderen’s reaction, the addition of hydrogen takes place in presence of Raney nickel catalyst. Platinum and palladium can also be used catalyst in these reactions. These are heterogeneous catalyst and used in finely divided state. Experimentally, it is observed that less crowded alkenes absorb H2 with faster rate. Controlled hydrogenation of alkyne in presence of Lindlar’s catalyst yields cis product i.e., ‘cis’ alkene. Thus, in presence of Lindlar’s catalyst ‘syn’ addition takes place. The relative rate of hydrogenation follows the order
Non-terminal alkynes are reduced in presence of Na or Li metal dissolved in liquid ammonia. In this reaction, anti-addition of hydrogen results into the trans-product.
The product of the following reaction is :
Chemistry-General
Chemistry-
Hydrogenation of alkenes and alkynes takes place in presence of certain catalysts. In Sabatier Senderen’s reaction, the addition of hydrogen takes place in presence of Raney nickel catalyst. Platinum and palladium can also be used catalyst in these reactions. These are heterogeneous catalyst and used in finely divided state. Experimentally, it is observed that less crowded alkenes absorb H2 with faster rate. Controlled hydrogenation of alkyne in presence of Lindlar’s catalyst yields cis product i.e., ‘cis’ alkene. Thus, in presence of Lindlar’s catalyst ‘syn’ addition takes place. The relative rate of hydrogenation follows the order
Non-terminal alkynes are reduced in presence of Na or Li metal dissolved in liquid ammonia. In this reaction, anti-addition of hydrogen results into the trans-product.
In which of the following cases, the reaction is most exothermic?
Hydrogenation of alkenes and alkynes takes place in presence of certain catalysts. In Sabatier Senderen’s reaction, the addition of hydrogen takes place in presence of Raney nickel catalyst. Platinum and palladium can also be used catalyst in these reactions. These are heterogeneous catalyst and used in finely divided state. Experimentally, it is observed that less crowded alkenes absorb H2 with faster rate. Controlled hydrogenation of alkyne in presence of Lindlar’s catalyst yields cis product i.e., ‘cis’ alkene. Thus, in presence of Lindlar’s catalyst ‘syn’ addition takes place. The relative rate of hydrogenation follows the order
Non-terminal alkynes are reduced in presence of Na or Li metal dissolved in liquid ammonia. In this reaction, anti-addition of hydrogen results into the trans-product.
In which of the following cases, the reaction is most exothermic?
Chemistry-General
Chemistry-
Chlorination of methane involves three steps: chain-initiating, chain-propagating and chain-terminating.
When oxygen is passed through the reaction mixture, chlorination of methane slows down temporarily
Although chlorination of methane is an exothermic, the reaction requires high temperature because
Chlorination of methane involves three steps: chain-initiating, chain-propagating and chain-terminating.
When oxygen is passed through the reaction mixture, chlorination of methane slows down temporarily
Although chlorination of methane is an exothermic, the reaction requires high temperature because
Chemistry-General
Chemistry-
Chlorination of methane involves three steps: chain-initiating, chain-propagating and chain-terminating.
When oxygen is passed through the reaction mixture, chlorination of methane slows down temporarily
Chain-terminating step may involve the formation of
Chlorination of methane involves three steps: chain-initiating, chain-propagating and chain-terminating.
When oxygen is passed through the reaction mixture, chlorination of methane slows down temporarily
Chain-terminating step may involve the formation of
Chemistry-General
Chemistry-
Chlorination of methane involves three steps: chain-initiating, chain-propagating and chain-terminating
When oxygen is passed through the reaction mixture, chlorination of methane slows down temporarily
Chain-propagating steps
Chlorination of methane involves three steps: chain-initiating, chain-propagating and chain-terminating
When oxygen is passed through the reaction mixture, chlorination of methane slows down temporarily
Chain-propagating steps
Chemistry-General
Chemistry-
The two hydrogen atoms in acetylene
The two hydrogen atoms in acetylene
Chemistry-General
Chemistry-
Ethane is produced during the electrolysis of potassium salt of
Ethane is produced during the electrolysis of potassium salt of
Chemistry-General
Chemistry-
A and B are
A and B are
Chemistry-General
