Assertion (A) : NH2 group of aniline is ortho, para directing in electrophilic substitutions.
Reason (R) : -NH2 group stabilises the arenium ion formed by the ortho, para attack of the electrophile.
The correct answer is
Both (A) and (R) are correct, (R) is the correct explanation of (A).
Both (A) and (R) are correct, (R) is not the correct explanation of (A).
(A) is correct, but (R) is not correct.
(A) is not correct, but (R) is correct.
In Dumas method, 0.3 g of an organic compound gave 45 mL of nitrogen at STP. The percentage of nitrogen is
16.9
18.7
23.2
29.6
The IUPAC name of the following compound is-
(CH3)2CH-CH=CH-CH=CH(C2H5)-CH3
2, 7-dimethyl-3, 5-nonadiene
2, 7-dimethyl-2-ethylheptadene
2-methyl-7-ethyl-3, 5-octadiene
1, 1-dimethyl-6-ethyl-2, 4-heptadiene
Ferric ion forms a Prussian blue coloured precipitate due to formation of
K4[Fe(CN)6]
Fe4[Fe(CN)6]3
Fe(CNS)3
K3[Fe(CN)6]
Which of the following will show geometrical isomerism?
1-butene
2-butene
2-methyl propene
Propene
B.
2-butene
To show geometrical isomerism the molecules must contain a double bond and each of the two carbon atoms of the double bond must have different substituents which may be same or different on both the carbon atoms. Thus, alkenes of the type abc = cab and abc = cde show geometrical isomerism.
n-propyl alcohol and iso-propyl alcohol are examples of
position isomerism
chain isomerism
tautomerism
geometrical isomerism
The IUPAC name of the following compound is:
7 [β-methyl butyl]; 9 butyl tridecane
3 [β-ethyl butyl]; 9 ethyl tridecane
2 [β-ethyl ethenyl]; 8 propyl decane
None of the above