When an alcoholic solution of ethylene dibromide is heated with granulated zinc, the compound formed is:

(a) ethane 

(b) ethylene

(c) butane

(d) isobutane

Concept Questions :-

difference between single, double and triple bond
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Acetylene and HCHO react in presence of copper acetylide catalyst to form:

(a) 2-butyne-1,4-diol

(b) 1-butyne-1,4-diol

(c) 2-butyne-1,2-diol

(d) none of these

Concept Questions :-

Aldehydes & Ketones
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What would be the product formed when 1-bromo-3-chlorocyclobutane reacts with two equivalents of metallic sodium in ether?

 

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Which of the following reagents would distinguish cis-cyclopenta-1, 2-diol from the trans-isomer?
(a) Ozone
(b) MnO2
(c) Aluminium isopropoxide
(d) Acetone

Concept Questions :-

1st, 2nd & 3rd Degree Alcohol
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In following reaction, find out X and Y.

In the reaction,H-CC-H   (ii)CH3CH2Br(I)NaNH2/liq.NH3X             X(ii)CH3CH2Br(i)NaNH2/liq.NH3Y

 

(a) X=2-butyne ; Y=3-hexyne

(b) X=2-butyne ; Y=2-hexyne

(c) X=1-butyne ; Y=2-hexyne

(d) X=1-butyne ; Y=3-hexyne

Concept Questions :-

Conversion Chart (n to n+1)
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An organic compound X having molecular formula C5H10O yields phenyl hydrazone and gives negative response to the iodoform test and Tollen's test. It produces n-pentane on reduction. X could be

(a) pentenal

b) 2-pentanone

(c) 3-pentanone

(d) n-amyl alcohol

Concept Questions :-

Aldehydes & Ketones
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Which of the following will not be soluble in sodium hydrogen carbonate?

(a) 2, 4,6 - trinitrophenol

(b) benzoic acid

(c) o-nitrophenol

(d) Benzenesulphonic acid

Concept Questions :-

Acid & Phenol
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In a reaction,

A is 

(a) HgSO4/H2SO4

(b) Cu2Cl2

(c) H3PO2 and H2O

(d) H+/H2O

Concept Questions :-

Aromatic Conversion
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In the following sequence of reactions,

 CH3-Br KCNAH3O+BetherLiAlH4C

the end product (C) is

(a) acetone

(b) methane

(c) acetaldehyde

(d) ethyl alcohol

Concept Questions :-

Conversion Chart (n to n+1)
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CH3CHO and C6H5CH2CHO can be distinguished chemically by

(a) Benedict test

(b) iodoform test

(c) tollen's reagent test

(d) Fehling solution test

Concept Questions :-

Aliphatic and Aromatic ald/ketone
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