Q.1.
Ethanal reacts with alkali to give 3-hydroxybutanal. This reaction is
-
47%
a) Aldol condensation
-
29%
b) Reimer-Tiemann reaction
-
18%
c) Claisen condensation
-
6%
d) Polymerisation
Q.2.
Ethane can be obtained from ethanal in one step b
-
22%
a) Na-Hg + water
-
22%
b) LiAlH4 + ether
-
28%
c) aluminium isopropoxide and isopropyl alcohol
-
28%
d) Zn-Hg + conc. HCl
Q.3.
Reduction of >C=O to CH can be carried out with ... .... [ DEC 2000 ]
-
8%
a) Catalytic reduction
-
17%
b) Na/C2H5OH
-
67%
c) NH2NH2/KOH
-
8%
d) LiAlH4
Explanation
Q.4.
Magenta is
-
9%
a) methyl red
-
18%
b) red litmus
-
45%
c) alkaline phenolphthalein
-
27%
d) p-rosaniline hydrochloride
Q.5.
Formaldehyde when reacted with methyl magnesium bromide gives
-
12%
a) CH3CHO
-
12%
b) CH3COOH
-
38%
c) HCHO
-
38%
d) C2H5OH
Q.6.
ion Q66) The following reaction is example of
-
14%
a) Wagner-Meerwin rearrangement
-
29%
b) Wolf rearrangement
-
43%
c) Facorskii rearrangement
-
14%
d) Steven's rearrangement
Q.7.
Acetophenone when reacted with a base C2H5ONa, yield a stable compound which has the structure
-
25%
a)
-
25%
b)
-
25%
c)
-
25%
d)
Explanation
Q.8.
During reduction of carbonyl compounds by H2NNH2 and KOH the first intermediate is
-
25%
a) RC=N
-
50%
b) RCH=NNH2
-
12%
c) RCH≡NH
-
12%
d) RCONH2
Explanation
Q.9.
The product formed by the reaction of chlorine with benzaldehyde in the absence of a catalyst is ... ..[ Tamil Nadu CET 2002]
-
29%
a) Chlorobenzne
-
14%
b) Benzyl chloride
-
29%
c) Benzoyl chloride
-
29%
d) o- Chlronenzaldehyde
Explanation
Q.10.
Aldehydes are produced in atmosphere by
-
14%
a) Oxidation of secondary alcohols
-
14%
b) Reduction of alkenes
-
71%
c) Reduction of oxygen atoms with hydrocarbons
-
0%
d) Reaction of oxygen atoms with ozone
Q.11.
CH3CHO + H2NOH → CH3-CH=N-OH . The above reaction occurs at .... ... [ IIT 1997]
-
17%
a) pH = 1
-
33%
b) pH = 3.5
-
17%
c) Any value of pH
-
33%
d) pH = 12
Q.12.
Hexamethylene tetramine is used as an
-
0%
a) antipyretic
-
20%
b) urinary antiseptic
-
60%
c) analgesic
-
20%
d) all of these
Q.13.
Both acetaldehyde and ketone react with
-
0%
a) rochelle salt
-
43%
b) 2,4-dintro phenylhydrazine
-
0%
c) ammonical AgNO3
-
57%
d) all of the above
Q.14.
ion Q74) The major organic product formed from the following reaction
-
40%
a)
-
20%
b)
-
40%
c)
-
0%
d)
Explanation
Q.15.
ion Q75) What is X in the equation below
-
17%
a) K2Cr2O7/H+
-
33%
b) NaBH4
-
33%
c) H2/Ni
-
17%
d) Both a and b
Q.16.
Than One Correct Answer Q76) Which show(s) nucleophilic addition reaction(s)
-
17%
a) Methanal
-
33%
b) Ethanal
-
33%
c) Propanone
-
17%
d) None of these
Q.17.
From which of the following, tertiary butyl alcohol is obtained, by the action of methyl magnesium iodide? ... ... [ MP CET 2000 ]
-
14%
a) HCHO
-
14%
b) CO2
-
57%
c) CH3COCH3
-
14%
d) CH3CHO
Explanation
Q.18.
ion Q78)
-
17%
a)
-
67%
b)
-
17%
c)
-
0%
d)
Explanation
Q.19.
When calcium benzoate and calcium formate are heated they form
-
25%
a) acetophenone
-
38%
b) benzaldehyde
-
25%
c) benzophenone
-
12%
d) formaldehyde
Explanation
Q.20.
When vapour of acetic acid are passed over .... at 300°C we get acetone
-
14%
a) Al2O3
-
29%
b) CuO
-
0%
c) MoO
-
57%
d) Cu
Q.21.
Alkaline hydrolysis R2C.Cl2 forms
-
20%
a) alkanal
-
40%
b) alkanone
-
20%
c) propane
-
20%
d) propanone
Explanation
Q.22.
Fehling's solution is
-
0%
a) acidified copper sulphate solution
-
0%
b) ammoniacal cuprous chloride solution
-
57%
c) copper sulphate, Richelle salt + NaOH
-
43%
d) none of the above
Q.23.
Than One Correct Answer Q83) Which of the following would not undergo aldol condensation?
-
0%
a) CCl3CHO
-
33%
b) HCHO
-
17%
c) CH3CHO
-
50%
d) (CH3)3CCHO
Q.24.
Than One Correct Answer Q84) Which statement(s) is /are correct in the case of acetaldehyde and acetone?
-
50%
a) Both can be reduced into alcohols
-
25%
b) Both react with NaOH to form polymer
-
25%
c) Both give iodoforms test
-
0%
d) Both react with HCN
Q.25.
Assertion: Cannizzaro's reaction is a disproportion reaction Reason: One molecule of aldehyde is oxidised on the cost of other
-
25%
a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion
-
50%
b) The Assertion and Reason are true but Reason is not correct explanation of Assertion
-
25%
c) Assertion is true but, Reason is false
-
0%
d) Assertion is false but, Reason is true
Q.26.
The order of susceptibility of nucleophilic attach on aldehydes follos the order ... ..[ DCE 2002]
-
0%
a) 2° > 3° > 1°
-
0%
b) 3° > 2° > 1°
-
75%
c) 1° > 2° > 3°
-
25%
d) 1° > 3° > 2°
Q.27.
Assertion: Salicylaldehyde is less soluble in water than p-hydroxy benzaldehyde Reason: The former shows intermolecular H-bonding
-
25%
a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion
-
50%
b) The Assertion and Reason are true but Reason is not correct explanation of Assertion
-
25%
c) Assertion is true but, Reason is false
-
0%
d) Assertion is false but, Reason is true
Q.28.
Which one of the following pairs is not correctly matched?
-
25%
a)
-
50%
b)
-
25%
c)
-
0%
d)
Q.29.
Oxidation of Butan-2-one can be achived by ....
-
0%
a) Tollen's reagent
-
50%
b) Atmospheric oxidation
-
25%
c) Br2 water
-
25%
d) Conc. HNO3
Q.30.
Which of the follwoing compounds will show positive silver mirror test?
-
0%
a) HCOOH
-
67%
b) CH3(CHOH)3CHO
-
17%
c) CH3COCHOCH3
-
17%
d) All