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

Arrange the following in increasing order of their acidic strength.
988270_e0c687ed4a824a91b7fa47806c9dcf3e.PNG
  • $$III < I < IV < II$$
  • $$II < I < IV < III$$
  • $$I < III < IV < II$$
  • $$II < III < I < IV$$
The IUPAC name of 
1123390_bc91086d4ed54e2da3683d7a7fb9157a.png
  • 2-Ethyl-3-menthyl-1-penten-4-yne
  • 2-Ethyl-3-methyl-4-pentyne-1-ene
  • 2-Methyl-1-penten-4-yne
  • 4-Ethyl-3-methy-1-pentyn-4-ene
The blue compound is formed in the positive test for nitrogen with Lassaigne's solution of an organic compound is:
  • $${ Na }_{ 4 }[Fe({ CN) }_{ 5 }(NOS)]$$
  • $${ Na }_{ 3 }[Fe({ CN) }_{ 6 }$$
  • $$[Fe({ CN) }_{ 3 }$$
  • $$Fe_4[Fe(CN)_6]_3$$
What are reactant $$X$$ and product $$Y$$ in the following sequence of reactions ?
989686_d2ac8ca37b6643c3a327b20c25f0b191.png
Which of the following compounds will have the highest percentage of enol content at equilibrium condition at the same temperature?  
  • $$CH_{3}COCH_{3}$$
  • $$CH_{3}COCH_{2}COOC_{2}H_{5}$$
  • $$CH_{3}COCH_{2}COCH_{3}$$
  • $$CH_{3}CHO$$
Which statements (s) is (are)correct?
  • A $$\pi$$ - bond is weaker then $$\sigma$$-bond
  • A $$\sigma -$$ bond is weaker then $$\pi-$$bond
  • A double bond stronger then H-bond
  • A covelent bond stronger then H-bond
Choose the correct statement regarding the preparation of Lassaigne's extract of a given organic compound.
  • Li can be used on the place of Na
  • Li cannot be used on the place of Na because its compound are covalent in nature
  • Both A and B
  • None of these
How many number of enolic form are possible for the compound 
1192194_cd10c4273b884cb3ab37cc84f019c68f.PNG
  • 1
  • 2
  • 3
  • 4
The correct sequence of decreasing number of $$\pi$$- bonds in the structure of $$H_2SO_3, H_2SO_4$$ and $$H_2S_2O_7$$ is:
  • $$H_2SO_3 > H_2SO_4 > H_2S_2O_7$$
  • $$H_2SO_4 > H_2S_2O_7 > H_2SO_3$$
  • $$H_2S_2O_7 > H_2SO_4 > H_2SO_3$$
  • $$H_2S_2O_7 > H_2SO_3 > H_2SO_4$$

The correct IUPAC name of the following alkane is:


1164826_9a9738229949454ea4c01ade4b309fab.png
  • 3 ,6-diethyl-2-methyloctane
  • 5-isopropyl-3-ethylocante
  • 3-ethyl-5-isopropylocatane
  • 3-isopropyl-6-ethyloctane
The species having no p$$\pi$$ - p$$\pi$$ bond is:
  • ClO$$_3$$
  • SO$$_3$$
  • COCl$$_2$$
  • NO$$_2$$
Which of the following orbital combination does not from $$\pi $$-bond?
  • $${ p }_{ x }+{ p }_{ x }$$ sideways overlapping
  • $${ d }_{ { x }^{ 2 }-{ y }^{ 2 } }+{ p }_{ x }$$ sideways overlapping
  • $${ d }_{ xy }+{ d }_{ xy }$$ sideways overlapping
  • $${ d }_{ yz }+{ p }_{ y }$$ sideways overlapping
Main axis of diatomic molecule is z. The orbitals $${p_x}$$ and $${p_y}$$ overlap to form
  • $$\pi $$ molecular orbital
  • $$\sigma $$ molecular orbital
  • $$\delta $$ molecular orbital
  • No bond will be formed.
In Lassaigne's test when both N and S are present, blood-red colour is due to the formation of____
  •  ferric sulphocyanide 
  •  ferric cyanide 
  •  ferric ferrocyanide 
  •  none of these
Identity the correct sequence of increasing number of $$\pi-$$bonds in structure of the following molecules:
I) $$H_{2}S_{2}O_{6}$$
II) $$H_{2}SO_{3}$$
III) $$H_{2}S_{2}O_{5}$$
  • $$I,II,III$$
  • $$II,III,I$$
  • $$II,I,III$$
  • $$I,III,II$$
How many pi (n) electrons are there in the following molecules?
1289102_a3a3fd972a0b4120a66fd53e63eb7629.PNG
  • 4
  • 6
  • 8
  • 10
IUPAC name of the compound,
$$ { CH }_{ 3 }-\overset { \overset { O }{ || }  }{ C } -\underset { \underset { { CH }_{ 3 } }{ | }  }{ CH } -\overset { \overset { CH=CH_{ 2 } }{ | }  }{ CH } -{ CH }_{ 2 }{ CH }_{ 2 }{ CH }_{ 3 }$$ is -
  • 4-propyl-3-methylhex-5-en-2-one
  • 3-propyl-5-methylhex-1-en-5-one
  • 3-methyl-4-propylhex-5-en-2-one
  • 3-methyl-4-vinylheptan-2-one

In the given compound, the number of $$\sigma$$ and $$\pi$$ bonds, respectively, are: 

1220295_2790578e5c9947d6a93cde645968636f.png
  • $$19, 11$$
  • $$19, 5$$
  • $$13, 11$$
  • $$7, 3$$
The $$IUPAC$$ name of given compound is:
1290041_2feef8a63c314a92922a6d8296e97f4f.png
  • Ethanoic propanoic anhydride
  • Propanoic ethanoic anhydride
  • 1-Ethanoyloxypropanone
  • 3-Ethanoyloxypropanone-3-one
The number of $$\sigma$$ and $$\pi$$ bonds present in a molecule of tetracyanoethane $$(CN)_{2}C=C(CN)_{2}$$ are
  • $$5\sigma$$ and $$9\pi$$
  • $$5\sigma$$ and $$8\pi$$
  • $$9\sigma$$ and $$9\pi$$
  • $$9\sigma$$ and $$7\pi$$
Functional group order for Cahn Ingold Prelog preference is 
1287193_27bb9d2664ee49139a739f3bee87f21e.png
  • I>II>III>IV
  • I>III>II>IV
  • IV>II>III>I
  • I>IV>III>II
Write the IUPAC name of given compound ?
1330555_108ec525e83c4bf1b9769452ada017ba.jpg
  • 1 - Chloro- 2- methylbenzene
  • o - chlorotoluene
  • 2 - chlorotoluene
  • both A and C
The correct statement related to $$IUPAC$$ nomenclature is:
  • If 2 or more chains of equal length are seen in the compound then the chain with the minimum number of side chains is preferred.
  • If double and triple bonds are at symmetrical positions in a compound then triple bond gets lower preference.
  • The correct $$IUPAC$$ name of $$CH_{3}COC_{2}H_{5}$$ is ethyl ketone.
  • As far as possible, the $$IUPAC$$ name of a compound is written as a single word.
How many different type of functional group are present in this compound?
1328269_8ab3284e1f724ca0b37526828d396c08.png
  • $$7$$
  • $$6$$
  • $$5$$
  • $$4$$
The IUPAC name of the following compound is:

1307814_a5a858162a4343de888cf14f542e617f.JPG
  • N,N-dimethylmethanal
  • N,N-dimethylmethanamide
  • N,N-dimethylcarbaldehyde
  • None
$$IUPAC$$ name of (see figure) is :
1320644_fe7c9949edf548638f23ebf20231342a.png
  • Cyclobutane-1 carbaldehyde-2-carboxylate
  • 2-Formylcyclobutane carboxylate
  • 2-formylcyclobutyl methanoate
  • 2-Methanoyloxy cyclobutane carbaldyde
The correct comparison in B.P's of different carbon compounds of similar molar masses is:
  • $$Propan-1-ol > Propanal > Propanone > Methoxymethane$$
  • $$Propan-1-ol > Propanone > Propanal > Methoxy \ ethane$$
  • $$Propan -1-ol>Methoxy\  ethane >Propanone >Propanal$$
  • $$Propanal>Propanol >Methoxy ethane >Propanone$$
In which of the following pair of elements the pi-bond formation tendency is maximum.
  • S and O
  • Si and O
  • P and O
  • Cl and O
The decreasing order of priority for the following functional groups according to IUPAC is 
i) $$ -C \equiv N $$
(ii) $$-CHO$$
(iii) $$ -CONH_2 $$
(iv) $$-OH$$
  • i > ii > iv > iii
  • ii > i > iv > iii
  • iii > ii > iv > i
  • iii > i > ii > iv
Which of the  following is the correct priority order of functional groups:
  • $$-SO_{3} H>-COR > -CHO > -OH$$
  • $$-COOH >-SO_{3}H > -CN >-CONH_{2}$$
  • $$-CN >- CHO >- COR >-OH$$
  • $$-COOR > -COX > -CHO >-CN$$
Stability of π−bondπ−bond in following in the increasing order is :
1367996_53a4dceb674a4e029b9e8dd34b05d470.PNG
  • I < III < IV < II
  • I < II < III < IV
  • IV < III < II < I
  • II < III < IV < I
Quinine is the most important alkaloid obtained from Cinchona bark. It's molecular formula is $$C_{20}H_{24}N_2O_2$$. It may contain
  • 5 double bond & 6 ring
  • 6 double bond & 4 ring
  • 6 double bond & 3 ring
  • 7 double bond & 5 ring
Which functional group has 'anol' suffix?
  • $$- C H O$$
  • $$- OH$$
  • $$- C OOH $$
  • none of these
The number of $$\pi $$  - bonds and $$\sigma $$  bonds in the above structure respectively are:
1502107_e926c72b6e8e4e3a816fa1f7f3384b84.PNG
  • 8, 5
  • 8, 6
  • 5, 8
  • 5, 13
The IUPAC name of compound
1483178_d0c28fb8f27a4c3d9f5f6b7f06e604a7.PNG
  • 3-carbonyl methoxy -5- ethanoyl oxy cyclogexanoic aicd
  • 3-ethanoyl oxy -5- methoxy carbonyl cyclohexane carboxylic acid
  • 5-ethanoyl oxy -5- methoxy carbonyl cyclohexane acid
  • 3-methoxy carbonyl -5- ethanoyl oxy cyclohexane carboxylic aicd
Two complexes $$\left[ Cr\left( { H }_{ 2 }O \right) _{ 6 } \right] { C }I_{ 3 }\left( A \right) $$ and $$\left[ Cr\left( { NH }_{ 3 } \right) _{ 6 } \right] { C }I_{ 3 }\left( B \right) $$ are violet and yellow coloured, respectively. The incorrect statement regarding them is:
  • $$\triangle _{ 0 }$$ values of $$(A)$$ and $$(B)$$ are calculated from the energies of violet and yellow light, respectively.
  • $$\triangle _{ 0 }$$ value of $$(A)$$ is less than that of $$(B)$$.
  • both absorb energies corresponding to their complementary colors.
  • both are paramagnetic with three unpaired electrons.
The correct order of +M effect of 'N' containing functional group on benzene ring amongst the given compounds is:
1571876_aa2cafa83b0a4937a5074435e8d90028.png
  • $$I > II > IV > III$$
  • $$II > I > III > IV$$
  • $$I > II > III > IV$$
  • $$IV > III > II > I$$
In which of the following $$p\pi -d\pi $$ bonding is observed ?
  • $$NO^-_3$$
  • $$SO^{2-}_3$$
  • $$BO^{3-}_3$$
  • $$CO^{2-}_3$$
Which of the following substrates is an electron donating group overall ?
  • $$- Br$$
  • $$- \underset{O}{\underset{||}{C}}CH_3$$
  • $$-OCH_3$$
  • $$-\overset{\bigoplus}{N} (CH_3)_3$$
IUPAC name of the given compound is:-
$$CH_2=C(Me)-CH_2-COOMe$$
  • Methyl-3-methyl but -3-en-oate
  • 2-Methyl-3-methoxy carbonyl propene
  • Dimethyl but-3- enoate
  • 1-methyoxy-3- methyl but-3- enone
The systematic name of $$ (CH_3)_2 CH-COOH $$ is:
  • 2-propanoic acid
  • Isobutanoic acid
  • 2-Methylpropanoic aid
  • 2-methylbutanoic acid
Which of the following has $$  p \pi-d \pi  $$ bonding?
  • $${  \mathrm{NO}_{3}}^{-} $$
  • $${  \mathrm{BO}_{3}}^{3-} $$
  • $${  \mathrm{SO}_{3}}^{2-} $$
  • $${  \mathrm{CO}_{3}}^{2-} $$
Number of $$\pi$$ electrons in conjugation for these compounds will be respectively:
1555316_0ab49ad7c1f547a4a9810b52ded16f0c.PNG
  • $$8, 6, 6, 6$$
  • $$6, 4, 6, 6$$
  • $$6, 6, 6, 6$$
  • None of the above
Which of these functional groups is not present in the  below compound given  
1607858_1041c4fc7056493f9af305f67bbce140.PNG
  • Nitrile
  • Acid
  • Amine
  • Ester
Which among the following is not correctly matched with their colour? 
      $$\text {Compound}$$                            $$\text {Colour}$$
  • $$ Na_4[Fe(CN)_5NOS ] $$                  purple
  • $$ Fe_4[Fe(CN)_6]_3 $$                           blue
  • $$ Fe(CNS)_3 $$                                    blood red
  • $$ AgCl $$                                               light yellow
A person is suffering from Diabetes, which get confirmed by testing his urine with Benedict's reagent. The organic compound and functional group present in the urine of suffering person is :
  • $$sucrose - COOH$$
  • Glucose, $$- \overset{O}{\overset{||}{C}} -$$
  • Glucose, $$- \overset{O}{\overset{||}{C}} - H$$
  • sucrose $$- \overset{O}{\overset{||}{C}} -$$
Chromyl chloride gives yellow ppt. when it reacts with respectively_________
  • $$Cu(OH)_2,PbNO_3$$
  • $$NaOH,(CH_2COO)_2Ca$$
  • $$NaOH,(CH_3COOO)_2Pb$$
  • $$KOH,PbSO_4$$
Which functional group is there in methyl ethanoate?
  • Alcohol
  • Halide
  • Ketone
  • Ester
The number of $$\sigma$$ bonds and $$\pi$$ bonds in the following structure respectively are:
1581163_db135713ddd44234a78dbb384fe6773f.PNG
  • $$8,5$$
  • $$8,6$$
  • $$3,8$$
  • $$5,13$$
Which compound cannot give a precipitate with an ammoniacal silver nitrate solution?
  • $$CH_3-C\equiv C-CH_3$$
  • $$CH_3-C(Me)C\equiv CH$$
  • $$C_2H_5-C\equiv CH$$
  • $$CH_3-C\equiv CH$$
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