By Jai Sir
Class : XIIth Subject : CHEMISTRY
Date : DPP No. : 7
Topic :- Aldehydes, Ketones & Carboxylic Acids
1. An acyl halide is formed when PC l 5 reacts with an:
a) Acid b) Alcohol c) Amine d)Ester
Generally it is more difficult to purify organic compounds than inorganic
compounds because:
2.
a) They are very unstable
b) Their m. p. and b. p. are low
c) Organic compounds have low solubility
d) Physical constants of organic compounds and the impurities associated with
them are very close to each other
3. The acetophenone can be converted to ethylbenzene by reaction with
a) LiAl H b) H NOH c) Pd /BaS O −H d) Zn−Hg/ HCl
4 2 4 2
4. When propionic acid is treated with aqueous sodium bicarbonate, C O2 is
liberated. The C from C O2 comes from
a) Methyl group b) Carboxylic acid group
c) Methylene group d)Bicarbonate
5. Boiling points of carboxylic acid are:
a) Lower than corresponding alcohols
b) Higher than corresponding alcohols
c) Equal to that of corresponding alcohols
d) None of the above
6. The —COOH group in a carboxylic acid can be replaced by ‘H’ by heating the
acid with:
a) Zn with HCl
b) H in presence of nickel
c) Sodalime
2
d) Bromine and concentrated aqueous alkali
7. The product obtained in the reaction
CH3 O CH3 - +
1. (CH3)2CHMgBr is
CH C CH
2H+
CH3 CH3
CH3 OH CH3
CH3 CH3
CH C CH
a) b) CH CH2(OH) CH + CH3 CH CH2
CH3 CH CH3
CH3 CH3
H3C CH3
CH3 OH d)There is no reaction
C CH3
c)
CH3 CH
CH3
8. Which of the following would produce secondary alcohol?
a)
b)
c)
d)
Which factor/s will increase the reactivity of >C=O group?
I. Presence of a group with positive inductive effect.
9.
II. Presence of a group with negative inductive effect.
III. Presence of large alkyl group.
a) Only (i) b) Only (ii) c) (i)and(iii) d)(ii)and (iii)
10. CH3CH2CH2COOH Red P/Br2 CH3CH2CH COOH
This reaction is called the
Br
a) Cannizaro reaction b) Schrodinger reaction
c) Hell-Volhard-Zelinsky reaction d)Reimer-Tiemann reaction
11. ( CH 3 )2 C =CHCOCH 3 can be oxidised to ( CH 3 )2 C =CHCOOH by:
a) Cu at 300℃ b) KMn O c) Chromic acid d)NaOI
4
12. The correct order of decreasing boiling points of CH 3 CONH 2( A ), CH 3 COCl ( B),
C H 3 COOH (C ¿ and ( CH 3 CO )2 O (D) is:
a) A> D> C> B b) A> B>C > D c) D>C >B > A d)None of these
13. Rate of reaction,
O O
R C + Nu- R C + Z-
Z
is fastest when Z is
Nu
a) Cl b) N H c) O C H d) OCOC H
2 2 5 3
14. Which is useful for separating benzoic acid from a mixture of benzoic acid and
methyl benzoate?
a) NaHCO (aq .) b) Dil. HCl c) Dil . H SO d) Dil . HNO
3 2 4 3
15. The compound X, in the reaction is
X C H 3 CHO Y Hydrolysis Mg ( OH ) I +C H 3 COOH
→ →
a) C H CHO b) C O c) ( C H ) CO d) HCHO
3 2 3 2
16. Which of the following does not undergo polymerization?
a) C H CHO b) HCHO c) CH COCH d)None of these
3 3 3
17. The reaction ,
R COOAg+ Br 2 CC l 4 R Br + AgBr +CO 2 is called :
a) HVZ reaction b) Hunsdiecker c) Hofmann’s
→
reaction reaction reaction
d)Carbylamine
18. Methyl ketones are characterised through:
a) The Tollen’s reagent
b) The iodoform test
c) The Schiff’s test
d) The Benedict’s reagent
19. An organic compound X contains Y and Z impurities. Their solubility differs
slightly. They may be separated by:
a) Simple crystallization
b) Fractional crystallization
c) Sublimation
d) Fractional distillation
20. Which of the following reactants on reaction with conc. NaOH followed by
acidification gives following lactone as the product
O
C
O
CH2
COOCH3 COOH CHO COOH
a) b) c) d)
COOH CHO CHO COOH
