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CBSE Questions for Class 11 Medical Chemistry Organic Chemistry Some Basic Principles And Techniques Quiz 12 - MCQExams.com

The functional groups present in the compound (A) is
  • Aldehydic (CHO)
  • Ketonic (OC)
  • Alcoholic (OH)
  • Alkoxy group (OR)
The molecular mass of a non-volatile organic compound is determined either by the Victor Meyer's.
method or Duma's method. 
  • True
  • False
Which of the following molecules is not having dπpπ bonding?
  • BCl3
  • P4O10
  • PF3
  • B3N3H6
How many bonds are there in 
1725787_4dd16a16d9074af1952a50227b9ca465.png
  • 14σ,8π
  • 18σ,8π
  • 14σ,2π
  • 19σ,4π
Molecular mass of a volatile organic solid can be determined by :
  • Silver salt method
  • Platinichloride method
  • Victor Meyer's method
  • Kjeldahl's method
In Lassaigne's test of nitrogen, the final product formed is sodium ferrocyanide.
  • True
  • False
Which of the following molecule(s) has /have dπpπ bonding?
  • H2S2O3
  • P4O10
  • SO3
  • SO2
Select the correct priority for citation as principal group
Which of the following functional groups is not present in vanillin?
  • COOH
  • CHO
  • OH
  • OCH3
Which of the following has pπdπ bonding?
  • NO3
  • CO23
  • BO33
  • SO23
Vanillin contains.
  • Cl
  • CONH2
  • CHO
  • COOH
A distinctive and characteristic functional group of fats is
  • An ester group
  • A peptide group
  • A ketonic group
  • An alcoholic group
Identify the correct sequence of increasing number of π bonds in structures of the following molecules.
(i) H2S2O6
(ii) H2SO3
(iii) H2S2O5
  • I,II,III
  • II,III,I
  • II,I,III
  • I,III,II
Which of the following elements forms pπdπ bonding in its oxide?
  • Lithium
  • Boron
  • Sulphur
  • Nitrogen
Which of the following  orbitals can from π bond if internuclear   axis is y axis ?
  • Px+dxy
  • Pz+dxz
  • dyz+dyz
  • Pxz+dxz
Vanillin contains:
  • A phenolic group
  • An alcoholic group
  • Both phenolic and alcoholic groups
  • Two phenolic groups
When propionic acid is treated with aqueous sodium bicarbonate, CO2 is liberated. The C of CO2 comes from:
  • Methyl group
  • Carboxylic acid group
  • Methylene group
  • Bicarbonate group
Quantitative estimation of C, H and extra elements (e.g.N, S, P and halogens) is carried out by Liebig’s combustion, Carius, Dumas, and Kjeldahl’s method.
Liebig’s combustion method is used for the quantitative estimation of:
  • C and H
  • Halogens
  • S and P
  • N
A chemist has 4 samples of artificial sweetener P, Q, R and S. To identify these samples, he performed certain experiments and noted the following observations.

(i) Q and R both form a blue-violet colour with ninhydrin.
(ii) Lassaigne extract of P gives positive AgNO3 test and negative Fe4[Fe(CN)6]3 test.
(iii) Lassaigne extract of R and S gives positive sodium nitroprusside test.

Based on these observations which option is correct?
  • P: Alitame; Q: Saccharine;
    R: Aspartame; S: Sucralose
  • P: Aspartame; Q: Saccharine;
    R: Sucralose; S: Alitame
  • P: Sucralose; Q:Aspartame;
    R:Alitame ; S: Saccharine
  • P: Saccharine; Q: Alitame;
    R: Sucralose; S: Aspartame
Which among the following is (R,Z) -7-ethoxy -2,7-dimethyl -4 - propyl nona-1,4 -diene ?
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