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 $$(-\overset {\overset {O}{\parallel}}{C}-)$$
  • 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 $$ d \pi - p \pi $$ bonding?
  • $$ BCl_3 $$
  • $$ P_4O_{10} $$
  • $$ PF_3 $$
  • $$ B_3N_3H_6 $$
How many bonds are there in 
1725787_4dd16a16d9074af1952a50227b9ca465.png
  • $$ 14 \sigma , 8 \pi $$
  • $$ 18 \sigma , 8 \pi $$
  • $$ 14 \sigma , 2 \pi $$
  • $$ 19 \sigma , 4 \pi $$
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 $$ d \pi- p \pi $$ bonding?
  • $$ H_2S_2O_3 $$
  • $$ P_4O_{10} $$
  • $$ SO_3 $$
  • $$SO_2$$
Select the correct priority for citation as principal group
Which of the following functional groups is not present in vanillin?
  • $$-COOH$$
  • $$-CHO$$
  • $$-OH$$
  • $$-OCH_{3}$$
Which of the following has $$p\pi -d\pi$$ bonding?
  • $$NO_3^{-}$$
  • $$CO_3^{-2}$$
  • $$BO_3^{-3}$$
  • $$SO_3^{-2}$$
Vanillin contains.
  • $$-Cl$$
  • $$-CONH_{2}$$
  • $$-CHO$$
  • $$-COOH$$
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 $$\pi-$$ bonds in structures of the following molecules.
(i) $$H_{2}S_{2}O_{6}$$
(ii) $$H_{2}SO_{3}$$
(iii) $$H_{2}S_{2}O_{5}$$
  • $$I, II, III$$
  • $$II, III, I$$
  • $$II, I, III$$
  • $$I, III, II$$
Which of the following elements forms $$p\pi-d\pi$$ bonding in its oxide?
  • Lithium
  • Boron
  • Sulphur
  • Nitrogen
Which of the following  orbitals can from $$\pi $$ bond if internuclear   axis is y axis ?
  • $$ P_{x}+d_{xy}$$
  • $$ P_{z}+d_{xz}$$
  • $$ d_{yz}+d_{yz}$$
  • $$ P_{x}z+d_{xz}$$
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, $${CO}_{2}$$ is liberated. The $$C$$ of $${CO}_{2}$$ 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 $$AgNO_3$$ test and negative $$Fe_4[Fe(CN)_6]_3$$ 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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