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CBSE Questions for Class 11 Medical Chemistry Organic Chemistry Some Basic Principles And Techniques Quiz 1 - MCQExams.com

What is the prefix if the number of carbon atoms is 3?
  • Eth-
  • Prop-
  • But-
  • Pent-
Number of π-bods in the following compound  CH3CCN3
  • 1
  • 2
  • 3
  • none
Correctly match is : 
  • dx2y2 atomic orbital -- One nodal plane
  • Py atomic orbital -- Two nodal planes
  • σPx -- ψ (gerade)
  • Ppy -- ψ (ungerade)
Prefix used for COOH functional group is :
  • Carbomayl
  • Carbonyl
  • Carboxy
  • Alkoxycarbonyl
Above Gauche form is stable when Z is:
1154913_0027fcc3de854c49be0258327bd0c88b.PNG
  • CH3
  • Et
  • Ph
IUPAC name of [VO(O2)(acac)2] is
  • bis(acetylacetonato)oxoperoxonanadium(VI)
  • bis(acetylacetonato)oxoperoxonanadium(V)
  • bis(acetylacetonato)oxoperoxonanadium(VIII)
  • bis(acetylacetonato)oxoperoxonanadium(IV)
Urea was first organic compounds to be synthesised by:
  • laminar
  • wohlar
  • beryine
  • haber
The functional groups which is not present in the given compound is:
1392081_287b946dcd9746fa9db9a129cd5ccfcd.png
  • Amide
  • Aldehyde
  • Amine
  • Ketone
Which functional group is present in a molecule of CH3OCH2CH3?
  • Ether
  • Carboxyl
  • Ketone
  • Aldehyde
  • Ester
Select the option having incorrect named compound(s) : 
(I) 3, 3-dimethyl-1-hydroxycyclohexane    (II) 4-ethoxy-2-methoxypentan-3-one
(III) 2-ethyl-1, 1-dimethylcyclopentane  (IV) 4-amino-2-hydroxy-4-oxobutanal
  • I, II and III
  • III only
  • II and IV
  • II only
Which of the following alkenes have more value of heat of hydrogenation than _____________.
1437380_cafeb9eb20814b4b859979ec822e7021.png
During the estimation of C and H, the CO2  produced is absorbed in 
  • KOH
  • Anhydrous CaCl2
  • CuO
  • O2
How may π-bonds in following molecules:
a) C2H6   b) C2H4    c) C2H2    
  • 0,2,1
  • 0,1,2
  • 2,0,1
  • 1,1,1
The number of π electrons in butadiene is 
  • 2
  • 4
  • 6
  • 8
The ratio of σ-bond and π-bond in tetracyano ethylene is:
  • 2:1
  • 1:1
  • 1:2
  • none of these

IUPAC name of above compound is :
460388.PNG
  • Dimethylamine 
  • 2-amino propane
  • Isopropylamine
  • 2-propanamine
Ethanoic acid is also known as :
  • citric acid.
  • nitric acid.
  • acetic acid.
  • formic acid.
The correct IUPAC name of the alkyl group,
CH3C2H5|CHCH2C2H5|CHCH3
  • 2-ethyl-3-sec-butyl propyl
  • 2,4-diethyl pentane
  • 2-ethyl-4-methylhexyl
  • 2-methyl-4-ethylexyl
IUPAC name of is
CH3C||OCH2C=N
  • 1Cyanpropan2 one
  • 3Cyanpropan2one
  • 3Oxobutanitrile
  • 2Opropanenitrie
IUPAC name of the compound 
BrCH2CHClCHCl2 is 
  • 1Bromo2,3,3trichloropropane
  • 1,1,2Trichloro3bromopropane
  • 3Bromo1,1,2trichloropropane
  • Trichlorobromopropane
IUPAC Name of some compounds are given. Which one is incorrect?
How many σ & π bonds are present in C2H4 molecule?
  • 5σ, 1π
  • 1σ, 5π
  • 6σ, 1π
  • 8σ, 1π
The IUPAC name of the compound is:
1513049_87e6781b4ddc4c018e8153e2a8328d71.bmp
  • 2 - Ethyl - 1 , 1 - dimethylcyclopentane
  • 1 - Ethyl - 2 , 2 - dimethylcyclopentane
  • 1 , 1 - Dimethyl - 2 - ethylcyclopentane
  • 2 , 2 - Dimethyl - 1 - ethylcyclopentane
Which of the following is extracted from the roots of  the valerian plant?
  • CH3(CH2)3COOH
  • CH3CH2COOH
  • CH3(CH2)2COOH
  • CH3(CH2)4COOH
Which of the following diamagnetic species having only π bond in the vapor phase?
  • O2
  • O22
  • B2
  • C2
The cyclic polymerization of methyl acetylene gives mesitylene. The number of sigma bonds in mesitylene is:
  • 16
  • 12
  • 18
  • 21
Total number of σ & π bonds in a molecule C2H2  are respectively :           
  • 3, 2
  • 4, 2
  • 3, 1
  • 2, 1
Which is / are the correct IUPAC name of the corresponding structures?
Carboxylic group is present in:
  • ethylene
  • methanoic acid
  • formaldehyde
  • ethanol
Total number of functional groups present in the given compound is:
1528379_fea60a3b08574c7d86b7177021b12560.PNG
  • 7
  • 10
  • 8
  • 9
Nodal planes of πbond(s) in CH2=C=C=CH2 are located in:
  • All are in molecular planar
  • Two in the molecular plane and one in a plane perpendicular to the molecular plane which contains CC σbond
  • One in the molecular plane and two in-plane perpendicular to the molecular plane which contains CC σbond
  • Two in the molecular plane and one in a plane perpendicular to the molecular plane which bisects CC σbond at the right angle
What is qualitative analysis?
  • Identification of unknown substance by direct observation
  • Identification of unknown substance by chemical tests.
  • Both A & B
  • None of the above
The correct IUPAC name of the compound is :
244393.gif
  • 5,6-Diethyl-3-methyl dec-4-ene
  • 5,6-Diethyl-8-methyl dec-6-ene
  • 6-Butyl-S-ethyl-3-methyl oct-4-ene
  • none of these
Which of the following species contains equal number of σ and π bonds ?
  • (CN)2
  • CH2(CN)2
  • HCO3
  • XeO4
The total number of π electrons in the given structure are :   

333498_7bda4a120ba040e1b9ad3a19b51c84e2.png
  • 12
  • 16
  • 4
  • 8
The functional group present in organic acid is:
  • OH
  • CHO
  • COOH
  • >C=O
The main source of organic compounds is :
  • coaltar
  • petroleum
  • both (a) and (b)
  • none of the above
How many pi bonds are present in phosgene?
  • 1
  • 2
  • 3
  • 4
Marsh gas is:
  • C6H6
  • CH4
  • C2H2
  • CO
Correct IUPAC name for the given compound is:
74115.JPG
  • 1-Ethoxy-1-aminobutane
  • 1-Amino-1-ethoxy-1-methylpropane
  • 1-Ethoxy-2-propanol
  • 2-Ethoxybutan-2-amine
Choose the correct options.
  • Name of the compound : is (1, 1-dimethylethyl) cyclononane
  • The IUPAC name of the compound :

    CH3CH=CH2CCCH2CH3 is oct-2-en-5-yne.
  • Ethanol is insoluble in water
  • Ethanol, when heated with Conc.H2SO4 at 443 K undergoes dehydration.
The fruity smell is of a/an:
  • aldehyde
  • ketone
  • alcohol
  • ester
Linear combination of two hybridised orbitals belonging to two atoms and each having one electron leads to the formation of:
  • sigma bond
  • double bond
  • co-ordinate covalent bond
  • pi bond
The colour of bromine solution is :
  • Red
  • Purple
  • Orange
  • Green
  • Blue
IUPAC name of CH3OC2H5 is:
  • ethoxy methane
  • methoxy ethane
  • both (A) and (B)
  • none of these
The IUPAC name of the compound, is?
1064278_776c2b829df448f9ad2d2b4d5be0974b.JPG
  • 2-methyl spiro [4.5] dec-1-ene
  • 2-methyl spiro [5.4] dec-1-ene
  • 2-methyl spiro [4.5] dec-2-ene
  • 2-methyl spiro [5.4] dec-2-ene
Indicate the wrongly named compound.
'I.U.P.A.C.', stands for?
  • Iodine Under Packing
  • International Union of Pure and Applied Chemistry
  • International Units of Protein and Carbohydrates
  • International Understanding on Physical Aspects of Chemistry
What is the correct IUPAC name of the following compound?

CH2=CHCH2CCH
  • Pent-1-en-4-yne
  • Pent-4-yn-1-ene
  • Pent-4-en-1-yne
  • Pent-1-yn-4-ene
IUPAC name of the compound
CH3(CH2)4CHCH3|C|C2H5(CH2)2CH3CH3 is?
  • 5 ethyl 4, 4dimethyl decane
  • 4 ethyl 4, 5dimethyl decane
  • 3,4 dimethyl 3 Hexane
  • 6,7 dimethyl decane
0:0:2


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