Assertion : SeCl4 does not have a tetrahedral structure.
Reason : Se in SeCl4 has two lone pairs.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Green chemistry means such reactions which
are related to the depletion of ozone layer
study the reactions in plants
produce colour during reactions
reduce the use and production of hazardous chemicals.
In the above sequence Y can be
3-nitrochlorobenzene
1-nitrochlorobenzene
4-nitrochlorobenzene
none of these
Assertion :Tertiarycarbonium ions are generally formed more easily than primary carbonium ions.
Reason : Hyperconjugation as well as inductive effect due to additional alkyl groups stabilize tertiary carbonium ions.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion : Pyrrole is an aromatic heterocyclic compound.
Reason : It has cyclic delocalised 6 electrons.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
A.
If both assertion and reason are true and reason is the correct explanation of assertion.
It is because it has structure like an aromatic ring & its resonance.The lone pair on nitrogen is in the p orbital so it is involved in a pi-electron aromatic system. Hence pyrrole is not very nucleophilic and is only weakly basic at nitrogen. The 4 electrons from the double bonds and the lone pair on the nitrogen give a total of 6 electrons, in accordance with Huckel's Rule (2_n+2).
For the reaction, 2NO2 + F2 2NO2F, following mechanism has been provided.
Thus, rate expression of the above reaction can be written as
r= k [NO2]2[F2]
r = k [NO2][F2]
r = k [NO2]
r = k [F2]
What is the correct relationship between the pHs of isomolar solutions of sodium oxide (pH1), sodium sulphide (pH2), sodium selenide (pH3) and sodium telluride (pH4)?
pH1 > pH2 = pH3 =pH4
pH1 <pH2 < pH3 <pH4
pH1 < pH2 > pH3< pH4
pH1> pH2 > pH3 > pH4