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A compound A of formula C3H6Cl2 on reaction with alkali can give B of formula C3H6O or C of formula C3H4. B on oxidation gave a compound of the formula C3H6O. C with dilute H2SO4 containing Hg2+ ion gave D of formula C3H6O, which with bromine and NaOH gave the sodium salt of C2H4O2. Then A is :
Identify the product (A) in following reaction series, (X)(Y)(Z)(A) :
(c)
Vapour density of an organic compound is 23.0. It contains 52.17% of carbon and 13% of hydrogen. The compound gives iodoform test. The compound is:
(a) Molar mass of compound is 46 which is of ethanol. It also gives iodoform test.
An amine is reacted with benzene sulphonyl chloride then a solid compound is formed which is insoluble in alkali. The amine is:
(b) Secondary amine is reacted with benzene sulphonyl chloride to form solid compound which is insoluble in alkali
An organic compound X on treatment with acidified K2Cr2O, gives compound Y which reacts with I2, and NaOH to form CHI3. The compound X can be
its 2 degree alcohol, which on oxidation gives ketone, and since product will be propanone , so it will give +ve iodoform reaction.
Give test to differentiate 1,1-dichloroethane and 1, 2-dichloroethane:
The reagent used in dehydrohalogenation process is:
The reaction,
The reagent used in dehalogenation process is:
Zn dust is used for dehalogenation,
Zn-Cu couple used as reducing agent is:
Which reaction sequence would be best to prepare 3-chloro-aniline from benzene?
An unknown compound A has a molecular formula C4H6. When A is treated with excess of Br2 a new substance B with formula C4H6Br4 is formed. A forms a white ppt. with ammoniacal silver nitrate solution. A may be:
(a) A white precipitate with am. AgNO3 confirms the presence of terminal alkyne.
The reduction of an alkyne to alkene using Lindlar's catalyst results into:
Acetylene can be converted to higher alkyne using the following sequence of reactions:
RCOOHRCH2OH. This mode of reduction can be effected only by:
(d) Na/C2H5OH, LiAlH4 or NaBH4 are used for this purpose.