Chemistry-
General
Easy
Question
Electrophiles are :
- Lewis acides
- Lewis bases
- Bronsted acids
- Bronsted bases
The correct answer is: Lewis acides
Related Questions to study
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
Chemistry-
Which is true statement?
Which is true statement?
Chemistry-General
Physics-
The current from the battery in circuit diagram shown is
The current from the battery in circuit diagram shown is
Physics-General
Physics-
In the figure shown, the total resistance between A and B is
In the figure shown, the total resistance between A and B is
Physics-General
Physics-
In the figure, the value of resistors to be connected between C and D so that the resistance of the entire circuit between A and B does not change with the number of elementary sets used is
In the figure, the value of resistors to be connected between C and D so that the resistance of the entire circuit between A and B does not change with the number of elementary sets used is
Physics-General
Physics-
An infinite sequence of resistance is shown in the figure. The resultant resistance between A and B will be, when 
and 
An infinite sequence of resistance is shown in the figure. The resultant resistance between A and B will be, when and
Physics-General
Physics-
Four resistances are connected in a circuit in the given figure. The electric current flowing through 4 ohm and 6 ohm resistance is respectively
Four resistances are connected in a circuit in the given figure. The electric current flowing through 4 ohm and 6 ohm resistance is respectively
Physics-General
Physics-
In the network of resistors shown in the adjoining figure, the equivalent resistance between A and B is
In the network of resistors shown in the adjoining figure, the equivalent resistance between A and B is
Physics-General
