What is obtained , when propene is treated with N-bromo succinimide ?
CH3-CBr=CH2
BrCH2-CH=CH2
BrCH2-CH=CHBr
BrCH2-CHBr-CH2Br
Poisonous gas 'Lewisite' is obtained by the reaction of :
CHCH and AsCl3
CH2=CH2 and AsCl3
CHCH and S2Cl2
CH2=CH2 and NOCl
Assertion : [Co(NO2)3(NH3)3] does not show optical isomerism.
Reason : It has a plane of symmetry.
If both assertion and reason are true and reason is the correct explanation of the assertion.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
If assertion is true, but reason is false.
Both assertion and reason are false statements.
Which is the best reagent to distinguish between propene and propyne ?
ammonical AgNO3
alkaline KMnO4
aqueous Br2
A.
ammonical AgNO3
Ammonical AgNO3 reacts only with propyne to give white precipitate , while propene does not react with it .
CH3-CCH + AgNO3 + NH4OH + NH4NO3 + H2O
The octane number of a sample of petrol is 40 .It means that its knocking property is equal to the mixture of :
40% n-heptane + 60% iso-octane
40% petrol + 60% iso-octane
60% n-heptane + 40% iso-octane
60% petrol + 40% iso-octane
Assertion: The presence ofnitro group facilitates nucleophilic substitution reactions in aryl halides.
Reason: The intermediate carbanion is stabilised due to the presence of nitro group.
If both assertion and reason are true and reason is the correct explanation of the assertion.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
If assertion is true, but reason is false.
Both assertion and reason are false statements.