Propyne and propene can be distinguished by
conc. H2SO4
Br2 in CCl4
dil. H2SO4
AgNO3 in ammonia
D.
AgNO3 in ammonia
Propyne because of the presence of acidic H-atom, reacts with ammoniacal AgNO3 and gives grey/ white silver propynilide. Propene, on the other hand, does not have any acidic H-atom, so it does not react with ammoniacal AgNO3. Hence, these two are separated by this reagent.
CH3C ≡ CH + AgNO3 + NH4OH → CH3C ≡ CAg ↓ + NH4NO3 + H2O
CH3CH ≡ CH2 + AgNO3 + NH4OH → No reaction
C2H5Cl . This method is
Wurtz synthesis
Kolbe synthesis
Corey House synthesis
Friedel-Craft synthesis
One of the isomer of the 5th member of alkyne series is optically active. It is
4-methyl pent-2-yne
3-methyl pent-1-yne
4-methyl pent-1-yne
3, 3-dimethyl but-1-yne
Acetylene and HCHO react in presence of copper acetylide catalyst to form
But-2-yne-1, 2-diol
But-1-yne-1, 4-diol
But-2-ene-1, 4-diol
2-butyne-1, 4-diol
Which of the following substance is not related with HVZ reaction?
α-bromo acetic acid
Zn/ Hg
Cl2
Red P
Which of the following compound show acidic nature?
but-1-yne
but-2-yne
but-1-ene
buta-1, 3-diene
Compound A on ozonolysis gives acetone and glyoxal. The compound A is
2, 5-dimethyl hex-2, 4-dene
2, 5-dimethyl hex-1, 5-diene
2, 5-dimethyl hex-3, 4-diene
2, 5-dimethyl but-2, ene
, A and B are
alc KOH and SeO2
NaNH2 and lindlar catalyst
alc KOH and NaNH2
Lindlar catalyst and NaNH2