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## AP State Syllabus 10th Class Physical Science Bits 12th Lesson Carbon and its Compounds with Answers

Concept – 1 : Versatile Nature of Carbon

Question 1.
The following is not correct about carbon
A) It is a non metal
B) It belongs to 14th group
C) Its electron configuration is 1s2 2s22p2
D) Its valency is 3
D) Its valency is 3

Question 2.
The electronegativity of carbon is
A) 1.5
B) 2.5
C) 3.5
D) 4
B) 2.5

Question 3.
Thecovalency of carbon is
A) 1
B) 2
C) 3
D) 4
D) 4

Question 4.
Match the following:
a) Methane — i) sp
b) Ethylene or ethene — ii) sp3
c) Acetylene or ethyne — iii) sp2
A) a → i, b → ii, c → iii
B) a → iii, b → ii, c → i
C) a → ii, b → iii, c → i .
D) a → ii, b → i, c → iii
C) a → ii, b → iii, c → i

Question 5.
Match the following:
a) Methane — i), 180°
b) Ethene — ii) 109° 28′
c) Ethyne — iii) 120°
A) a → i, b → ii, c → iii
B) a → iii, b → ii, c i
C) a → ii, b → i, c → iii
D) a → ii, b → iii, c → i
D) a → ii, b → iii, c → i

Question 6.
Carbon (Z=6) is the element of group-IVA of periodic table. Which of the following is the atomic number of next number in the group
A) 9
B) 14
C) 15
D) 17
B) 14

Question 7.
The number of sigma and pi bonds in ethene are …………,………………respectively.
A) 1, 5
B) 2, 3
C) 3,2
D) 5,1
D) 5,1

Question 8.
Number of sigma and pi bonds in ethyne are ……………
A) 2, 3
B) 3, 2
C) 4,1
D) 1, 4
B) 3, 2

Question 9.
Ethylene is common name for ……………….
A) ethene
B) ethane
C) ethyne
D) ethanol
A) ethene

Question 10.
Acetylene is common name for ……………..
A) ethane
B) ethene
C) ethyne
D) ethanol
C) ethyne

Question 11.
The number of a bonds in methane is …………………
A) 2
B) 3
C) 4
D) 1
C) 4

Question 12.
The electronic configuration of carbon in excited state is ………………….
A) 1s2 2s2 2p1y2p1z
B) 1s2 2s1 2p1x2p1y2p1z
C) 1s2 2s2 2p1x 2p1y
D) 1s2 2s2 2p2x
B) 1s2 2s1 2p1x2p1y2p1z

Question 13.
The bond angle in C2H2 molecule is
A) 109° 28′
B) 120°
C) 180°
D) 107°
D) 107°

Question 14.
How many unpaired electrons the carbon atom posseses in the ground state?
A) 2
B) 3
C) 4
D) 1
A) 2

Question 15.
The type of hybridization in CH4 molecule is ………..
A) sp
B) sp2
C) sp3
D) sp3d
C) sp3

Question 16.
Which of the following molecules undergo sp hybridisation ?
A) CH4
B) C2H4
C) C2H6
D) C2H2
D) C2H2

Question 17.
Who among the following disproved vitalism theory ?
A) Berzelius
B) Linus pauling
C) Autbau
D) Wohler
D) Wohler

Question 18.
The bond angle in C2H4 is
A) 109° 28′
B) 180°
C) 104° 27′
D) 120°
D) 120°

Question 19.
The chemical bonds present in C2H2 are
A) 2 sigma and 3 pi
B) 1 sigma and 2 pi
C) 3 sigma and 2 pi
D) 2 sigma and 1 pi
C) 3 sigma and 2 pi

Question 20.
n – butane and isobutane are
A) structural isomers
B) functional isomers
C) stereo isomers
D) geometrical isomers
A) structural isomers

CONCEPT – II – Allotropes of Carbon

Question 21.
The property of an element to exist in two or more physical forms with same chemical properties but different physical properties is called
A) catenation
B) isomerism
C) allotropy
D) conjugation
C) allotropy

Question 22.
The amorphous forms of carbon allutropes
i) coal
ii) coke
iii) animal charcoal
iv) diamond
A) only i
B) only ii
C) both i and ii
D) i, ii and iii
D) i, ii and iii

Question 23.
The crystalline forms of carbon allotropes
i) diamond
ii) graphite
iii) lamp black
iv) buckminster fullerene
A) only i
B) both i and ii
C) i, ii and iv
D) all of these
C) i, ii and iv

Question 24:
The hybridisation present in diamond is
A) sp
B) sp2
C) sp3
D) dsp2
C) sp3

Question 25.
The hardest material among these is ……………….
A) diamond
B) graphite
C) buckminster fullerene
D) coke
A) diamond

Question 26.
In diamond each carbon atom has a …………………… environment.
A) trigonal planar
B) tetrahedral
C) square planar
D) pyramidal
B) tetrahedral

Question 27.
Graphite forms ……………. layer structure.
A) one dimensional
B) two dimensional
C) three dimensional
D) none of these
B) two dimensional

Question 28.
In layer structure of graphite the carbon atoms are in ………………. environment.
A) trigonal planar
B) tetrahedral
C) square planar
D) pyramidal
A) trigonal planar

Question 29.
The hybridisation present in graphite is …………………….
A) sp
B) sp2
C) sp3
D) d2sp3
B) sp2

Question 30.
The distance between two successive layers of graphite is…………….
A) 1.35 A°
B) 2.35 A°
C) 3.35 A°
D) 4.35 A0
C) 3.35 A°

Question 31.
The use of graphite is ……………….
A) lubricant
C) good conductor of electricity
D) all of these
D) all of these

Question 32.
Delocalized n system is present in …….
A) diamond
B) charcoal
C) coal
D) graphite
D) graphite

Question 33.
Graphite is a good conductor of electricity due to ………………….
A) delocalized a system
B) localized n system
C) delocalized n system
D) localized a system
C) delocalized n system

Question 34.
Buckminster fullerene was discovered by ………………
A) Robert F. Curl
B) Harold W.Kroto
C) Richard E. Smalley
D) All of these
D) All of these

Question 35.
Bucky balls are ………………. fullerences.
A) cylindrical
B) spherical
C) conical
D) elliptical
B) spherical

Question 36.
The shape of Buckminster fullerene is ………………..
A) soccer ball
B) cricket ball
D) base ball
A) soccer ball

Question 37.
The pentagonal and hexagonal faces in Buckminster fullerene are ……………… and ………………. respectively.
A) 12, 20
B) 20,12
C) 12,18
D) 18,12
A) 12, 20

Question 38.
The hybridisation present in Buckminster fullerene is ……………….
A) sp3
B) sp2
C) sp
D) sp3d2
B) sp2

Question 39.
……. is useful in curing melanoma cancer.
A) Diamond
B) Graphite
C) Fullerene
D) Nano tube
C) Fullerene

Question 40.
Nano tubes were discovered by …………………
A) H. W. Kroto
B)-RE. Smalley
C) Sumi Li Jima
D) R. F. Curl
C) Sumi Li Jima

Question 41.
The uses of nano tubes are
i) used as molecular wires
ii) used in integrated circuits instead of copper
iii) biomolecules are inserted into nano tubes to inject them into a single cell
A) only i
B) both i and ii
C) i, ii and iii
D) none of these
C) i, ii and iii

Question 42.
Graphene is extracted from
A) graphite
B) diamond
C) nano tube
D) coal
A) graphite

Question 43.
…………. conducts electricity better than copper
A) Graphite
B) Graphene
C) Nano tubes
D) Buckminster fullerene
B) Graphene

Question 44.
…………… named the compounds derived from living organisms as organic compound
A) Wohler
B) Berzelius
C) Lewis
D) Pauling
B) Berzelius

Question 45.
The first synthetic carbon compound is …….. and it was prepared by …………
A) Acetic acid, Wohler
B) Alcohol, Berzelius
C) Urea, Wohler
D) Dimethyl, Lewis
C) Urea, Wohler

Question 46.
The formula of Urea is
A) NH4CNO
B) CO(NH2)2
C) CH3CONH2
D) C3H7NH2
B) CO(NH2)2

Question 47.
The formula of ammonium cyanate is ……………..
A) NH4CNO
B) CO(NH2)2
C) CH3COONa
D) CH3NH2
A) NH4CNO

Question 48.
The ability to form longest chains with its own atoms is ………..
A) Allotropy
B) Isomerism
C) Catenation
D) Combustion
C) Catenation

Question 49.
The following elements show catenation.
A) carbon
B) sulphur
C) phosphorous
D) all of these
D) all of these

Question 50.
The properties which made carbon as versatile element
i) Tetra valency
ii) Catenation
iii) Isomerism
iv) Formation of multiple bonds
A) only i
B) only ii
C) both i and ii
D) All of these
D) All of these

Question 51.
The hardest material among the allotropes of carbon is
A) diamond
B) graphite
C) coke
D) coal
A) diamond

Question 52.
Which of the following is not an electric conductor?
A) nano tube
B) graphene
C) diamond
D) graphite
C) diamond

Question 53.
In integrated circuit ………….. are used instead of copper to connect the components together
A) graphite
B) C60
C) nano tubes
D) PVC
C) nano tubes

CONCEPT – III : Hydro Carbons

Question 54.
Hydrocarbons contains the following elements
A) H, C
B) H, CO
C) N, C
D) H, Cl
A) H, C

Question 55.
The characteristic properties of an organic compound which depend on atom or group of atoms in its molecule is known as …………………
A) standard group
B) functional group
C) associate group
D) alkyl group
B) functional group

Question 56.
The phenomenon of possessing same molecular formula but different properties by compounds in known as ……..
A) Allotropy
B) Catenation
C) Isomerism
D) Combustion
C) Isomerism

Question 57.
Which of the following is a saturated hydrocarbon?
A) C2H4
B) C2H2
C) C3H6
D) C2H6
D) C2H6

Question 58.
The general formula of alkynes is
A) C2H2n+2
B) CnH2n-2
C) CnH2n
D) CnH2n+1
B) CnH2n-2

Question 59.
Match the following :
a) Alkanes — i) Hydrocarbons containing double bonds
b) Alkenes — ii) Hydrocarbons containing triple bonds
c) Alkynes — iii) Hydrocarbons containing single bonds
A) a → i, b → iii, c → ii
B) a → i, b → ii, c → iii
C) a → iii, b → i, c → ii
D) a → ii, b → iii, c → i
C) a → iii, b → i, c → ii

Question 60.
Match the following :
a) Alkanes i) C2H2n-2
b) Alkenes ii) C2H2n+2
c) Alkynes iii) C2H2n
A) a → ii, b → iii, c → i
B) a → i, b → ii, c → iii
C) a → iii, b → ii, c → i
D) a → iii, b → i, c → ii
a) Alkanes i) C2H2n-2

Question 61.
The hydrocarbon having single bonds between the carbon atoms is ……………
A) Ethane
B) Ethene
C) Propene
D) Butyne
A) Ethane

Question 62.
The number of hydrogen atoms in octane is ………………
A) 8
B) 18
C) 16
D) 14
B) 18

Question 63.
To detect the leakage of gas from the cylinder the substance added to the gas is……..
A) C2H5SH
B) C2H5OH
C) CH3COOH
D) CH3CHO
A) C2H5SH

Question 64.
Which of the following compound is not a hydrocarbon ?
A) R—CH3
B) RCH —CH2
C) RCH2OH
D) CH3CH = CH2
B) RCH —CH2

CONCEPT – 4 : Nomenclature of Hydrocarbons

Question 65.
IUPAC name of alkene containing 3 carbon atoms is ………………..
A) ethene
B) propene
C) butene
D) pentene
B) propene

Question 66.
Carbon compounds containing double bonds and triple bonds are called ………….. hydrocarbons.
A) saturated
B) unsaturated
C) super saturated
D) none of these
B) unsaturated

Question 67.
Number of single covalent bonds in ammonia is . …………..
A) 1
B) 2
C) 3
D) 4
C) 3

Question 68.
Which one of the following hydrocarbon can show isomerism
A) C2H4
B) C2H6
C) C3H8
D) C4H10
D) C4H10

Question 69.
The number of structural isomers for pentane is
A) 2
B) 3
C) 4
D) 5
B) 3

Question 70.
The series of carbon compounds in which two successive compounds differ -CH2 unit is called …………..
A) Reactivity series
B) Homologous series
C) Lyman series
D) Balmer series
B) Homologous series

Question 71.
Match the following:
a) Alcohol — i) — CHO
b) Aldehyde — ii) OH
c) Ketone — iii) COOH
d) Acid — iv) C0
A) a → i1b →ii,c →iii,d →iv
B) a →iv,b →iii,c →ii,d →i
C) a →ii,b →i,c →iv,d →iii
D)a →iv,b →ii,c →iii,d →i
C) a →ii,b →i,c →iv,d →iii

Question 72.
Match the following
a) Butanol — i) CH3-CH2-CH2-CH2-COOH
b) Pentanoic acid — ii) CH3 – CH2 – CH2 – CH2 – CH2– CHO
c) Propanone — iii) CH3-CH2-CH2-CH2-OH
d) Hexanal — iv) CH3COCH3
A) a → i,b → ii,c → iii,d → iv
B) a → iv,b → iii,c → ii,d → i
C) a → iii,b → i,c → iv,d → ii
D) a → iv,b → ii,c → iii,d → i
C) a → iii,b → i,c → iv,d → ii

Question 73.
A compound which is a basic constituent of many cough syrups
A) Methanol
B) Ethanol
C) Ethyl alcohol
D) Both B and C .
D) Both B and C .

Question 74.
Very dilute solution of ethanoic acid is …………..
A) Vinegar
B) Baking soda
C) Washing soda
D) Quick lime
A) Vinegar

Question 75.
The functional group present in methanol is ……….
A) Alcohol
B) Aldehyde
C) Acid
D) Ketone
A) Alcohol

Question 76.
The first member of homologous series among alkynes is ………………..
A) Methyne
B) Ethyne
C) Propyne
D) Butyne
B) Ethyne

Question 77.
The suffix used for naming aldehyde is ………….
A) — ol
B) — al
C) — one
D) — ene
B) — al

Question 78.
—NH2 group is called …………….
A) ester
B) ether
C) amine
D) amide
C) amine

Question 79.
Combustion of hydrocarbon is generally accompanied by the evolution of ……………..
A) heat
B) light
C) both heat and light
D) electric current
C) both heat and light

Question 80.
Oxidation of ethyl alcohol forms
A) ethanoic acid
B) acetic acid
C) formic acid
D) both A and B
D) both A and B

Question 81.
The oxidizing agent used for conversion of alcohols to carboxylic acids is …………….
A) Alkaline potassium dichromate
B) Manganese dioxide
C) Acidified potassium dichromate
D) Both A and C
D) Both A and C

Question 82.
The catalyst used in hydrogenation of oils is ………………..
A) Pd
B) Pt
C) Ni
D) Co
C) Ni

Question 83.
Unsaturated organic compounds participate in …………….. reactions.
A) substitution
C) elimination
D) rearrangement

Question 84.
A reaction in which an atom or a group of atoms in a compound is replaced by other atom or group of atoms is called
……………… reaction.
B) elimination
C) substitution
D) rearrangement
C) substitution

Question 85.
Paraffins are ………………..
A) Alkanes
B) Alkenes
C) Alkynes
D) Alcohols
A) Alkanes

Question 86.
Saturated hydrocarbons (Alkanes) participate in ……………… reactions.
B) substitution
C) elimination
D) rearrangement
B) substitution

Question 87.
The process of conversion of starches and sugars to ethyl alcohol is called ……………..
A) carbonisation
B) esterification
C) condensation
D) fermentation
D) fermentation

Question 88.
2 – Methyl propane is also called
A) Iso propane
B) n-butane
C) n – propane
D) Isobutane
D) Isobutane

Question 89.
The IUPAC name of
HO – CH2– CH2– CH2– COOH.
A) 1 – hydroxy – 4 -butanoic acid
B) 4 – carboxyl – 1 – butanol
C) 3 – hydroxy -1- propanoic acid
D) 4 – hydroxy -1 – butanoic acid
D) 4 – hydroxy -1 – butanoic acid

Question 90.
Esters are dervivatives of ………………….
A) Ketones
B) Alcohols
C) Ethers
D) Carboxylic acids
D) Carboxylic acids

Question 91.
The name of the structure
CH3 – CH = C = CH2 is
A) Butene
B) Buta – 1, 2 – diene
B) Buta – 1, 2 – diene

Question 92.
CH3 – NH – CH3 is known as
A) primary amine
B) teritituted amine
C) secondary amine
D) quaternary ammonium salt
C) secondary amine

Question 93.
The general formula of ester is
A) R – O – R
B) R – CO – R
C) R-COOR
D) R – CHO
C) R-COOR

Question 94.
The functional group in ketone is
A)
B) —COOH
C) —OH
D) — COOR
A)

Question 95.
The functional group which is recognised as alcohol is
A) —CHO
B) —OH
C) —CO
D) —COOH
B) —OH

Question 96.
The unsaturated hydrocarbon that contains multiple bonds undergo the following type of reaction to become a saturated hydrocarbon.
A) combustion
C) oxidation
D) substitution

Question 97.
If CH3 – CH2 – CH2 – COOH is the IUPAC structure of carbon compound, then the carbon compound is
A) Butene
B) Butanol
C) Butanoic acid
D) But – 1 – ene
C) Butanoic acid

Question 98.
If the carbon compound has many functional groups, then the order of preference while naming according to IUPAC nomenclature is
A) CONH2 > CHO > NH2 > — COOH
B) — COOH >CONH2 > CHO NH2
C) — CHO > CONH2 > COOH > NH2
D) — COOH > CHO > NH2 > CONH2
B) — COOH >CONH2 > CHO NH2

Question 99.
The IUPAC name of
NH2 – CH2 – CHOH – CH2 – COOH is
A) 1 – amino – 2 hydroxy butanoic acid
B) 3 – hydroxy – 4 – amino butanoic acid
C) 4 – amino – 3 – hydroxy butanoic acid
D) 1 – amino – 3 – hydroxy butyric acid
C) 4 – amino – 3 – hydroxy butanoic acid

Question 100.
IUPAC name of Cl3C – CH2 – CHO
A) 3, 3, 3 – trichloro propanal
B) 3, 3, 3 – trichloro propanol
C) 1,1,1 – trichloro propanol
D) 1,1,1 – trichloro propanal
A) 3, 3, 3 – trichloro propanal

Question 101.
IUPAC name of

A) chloro butane
B) 2 – chloro butane
C) 2, 3 – chloro butane
D) 2, 3 – dichloro butane
D) 2, 3 – dichloro butane

Question 102.
Simplest ketone is
A) CH3COCHg
B) CH3COCH2CH3
c) CH3COCH2CH2CH3
D) CH3CH2CHO
A) CH3COCHg

Question 103.
Simplest acid is
A) Ethanoic acid
B) Methanoic acid
C) Propanoic acid
D) Butanoic acid
B) Methanoic acid

Question 104.
The IUPAC name of following structure is

A) 2 – chloro – butanoic acid
B) 3 – chloro butanoic acid
C) 3 – chloro – pentanoic acid
D) 2 – chloro pentanoic acid
B) 3 – chloro butanoic acid

CONCEPT – 5 : Some Important Carbon Compounds

Question 105.
Match the following:
a) Methyl chloride i) CHCl3
b) Methylene chloride ii) CH3Cl
c) Chloroform iii) CH2Cl2
d) Carbon tetra chloride iv) CCl4
A) a → i, b → ii, c → iii, d → iv
B) a → iv, b → iii, c → ii, d → i
C) a → iv, b → iii, c → i, d → ii
D) a → ii, b → iii, c → i, d → iv
D) a → ii, b → iii, c → i, d → iv

Question 106.
Match the following:
a) Ethanol i) Acetic acid
b) Ethanoic acid ii) Acetaldehyde
c) Ethanal iii) Chloroform
d) Trichloro iv) Ethyl alcohol
methane
A) a → i, b → ii, c → iii, d → iv
B) a → iv, b → iii, c → ii, d → iv
C) a → iii, b → ii, c. → iv, d → i
D) a → iv, b → i, c → ii, d → iii
D) a → iv, b → i, c → ii, d → iii

Question 107.
Pure ethanol is called …………….
A) absolute alcohol
B) rectified spirit
C) denaturated spirit
D) None of these
A) absolute alcohol

Question 108.
Denaturated alcohol is ethanol that contains impurities like ……………..
A) Methanol
B) Methyl isobutyl ketone
C) Aviation gasoline
D) All of these
D) All of these

Question 109.
When sodium metal is dropped in ethanol ………………. gas will be released.
A) Oxygen
B) Hydrogen
C) Chlorine
D) Nitrogen
B) Hydrogen

Question 110.
The product that is formed by dehydration of ethanol in concentrated sulphuric acid is ……………….
A) Ethane
B) Ethene
C) Ethyne
D) Ethanal
B) Ethene

Question 111.
Which of the four tubes containing
following chemicals show the brisk effervescence when dilute acetic acid is added to them ?
i) KOH
ii) NaHCO3
iii) K2CO3
iv) NaCl
A) i & ii
B) ii & iii
C) i&iv
D) i & iii
B) ii & iii

Question 112.
A sweet odour substance formed by reaction of an alcohol and carboxylic acid is ……………………..
A) Ether
B) Aldehyde
C) Ketone
D) Ester
D) Ester

Question 113.
Which of the following solution of acetic acid in water can be used as preservative.
A) 5 -10 %
B) 10 -15 %
C) 15 – 20 %
D) 100 %
A) 5 -10 %

Question 114.
Acetic acid, when dissolved in water, dissociates into ions reversibly because it is a
A) weak acid
B) strong acid
C) weak base
D) strong base
A) weak acid

Question 115.
2 ml of ethanoic acid was taken in three test tubes A, B and C and 2 ml, 4 ml and 8 ml water was added to them respectively. A clean solution is obtained in
A) Test tube A only
B) Test tubes A & B only
C) Test tubes B & C only
D) All the test tubes
D) All the test tubes

Question 116.
If 2 ml of acetic acid is added slowly in drops to 5 ml of water then we will notice
A) the acid forms a separate layer on the top of water
B) water forms a separate layer on the top of the acid
C) formation of clear and homogeneous solution
D) formation of pink and clear solution
C) formation of clear and homogeneous solution

Question 117.
A few drops of ethanoic acid were added to sodium carbonate. The possible results of the reaction :
A) A hissing sound was evolved
B) Brown fumes evolved
C) Brisk effervescence occurred
D) A pungent smelling gas evolved
C) Brisk effervescence occurred

Question 118.
When acetic acid reacts with ethyl o alcohol, we add coiic.H2S04 . It acts as and the process is called
A) oxidizing agent, saponification
B) dehydrating agent, esterification
C) reducing agent, esterification
D) acid and esterification
B) dehydrating agent, esterification

Question 119.
The strength of acids may be expressed in terms of
A) H+ ion concentration
B) pH
C) PKa
D) all of these
D) all of these

Question 120.
Sodium or potassium salt of fatty acid is……
A) soap
B) detergent
C) indicator
D) soda
A) soap

Question 121.
Match the following
a) Palmitric acid — i) C17H35COOH
b) Stearic acid — ii) C17H33COOH
c) Oleic acid — iii) C17H31COOH
A) a → i, b → ii, c → iii
B) a → iii, b ii, c → i
C) a → iii, b → i, c → ii
D) a → ii, b → iii, c → i ‘
C) a → iii, b → i, c → ii

Question 122.
Alkaline hydrolysis of tri esters of higher fatty acids producing soaps is called
A) esterification
B) hydrolysis
C) saponification
D) neutralization
C) saponification

Question 123.
Ravi added acid to the metal hydrogen carbonate and observed the gas evolved. The evolved gasis
A) O2
B) N2
C) H2
D) CO2
D) CO2

Question 124.
The carboxylic acid used to preserve pickles is
A) Methanoic acid
B) Propanoic acid
C) Ethanoic acid
D) Butanoic acid
C) Ethanoic acid

Question 125.
CH3 — CH2 — OH reacts with alkaline KMnO4 and heats to form first the compound A, which futher oxidises to form a compound B. The name of compound B is
A) Ethanol
B) Ethanal .
C) Formaldehyde
D) Acetic acid
D) Acetic acid

Question 126.
But – 2 – yne reacts with H2 in the presence of ‘NT catalyst to form But -1 – ene. This reaction is an example of ………………….
A) substitution reaction
C) elimination reaction
D) rearrangement reaction

Question 127.
Which of the following organic compounds undergoes substitution reaction ?
A) Alkanes
B) Alkenes
C) Alkynes
D) All
A) Alkanes

Question 128.
Which of the following substitution products is not formed when methane reacts with chlorine in sunlight ?
A) chloroform
B) carbon chloride
C) methylene chloride
D) ethyl chloride
D) ethyl chloride

Question 129.
The process of conversion of starch and sugar into ethanol by using enzymes is called
A) Fermentation
B) Esterification
Q Carbonization
D) Pyrolysis
A) Fermentation

Question 130.
The sweet odour substance formed by the reaction of an alcohol and carboxylic acid is
A) ester
B) amine
C) ether
D) aldehyde
A) ester

Question 131.
The general formula of alcohol is
A) CnH2n+1OH
B) CnH2n+1NH2
C) CnH2n+1CH0
D)(CnH2n+1)2O
A) CnH2n+1OH

Question 132.
In combustion of alkane the heat energy is
A) absorbed
B) liberated
C) neither absorbed nor liberated
D) depends on alkane
B) liberated

CONCEPT VI: Soap – Saponification Micelle

Question 133.
A spherical aggregate of soap molecule in water is called …………….
A) nucleus
B) cell nucleus
C) micelle
D) none of these
C) micelle

Question 134.
CMC means
A) Critical Molar Concentration
B) Conical Molar Concentration
C) Critical Micelle Concentration
D) Conical Micelle Concentration
C) Critical Micelle Concentration

Question 135.
In true solution the solute particle diameter is
A) more than 1 nm
B) less than 1 nm
C) equal to 1nm
D) none of these
B) less than 1 nm

Question 136.
The polar end in micelle ……………… in nature.
A) hydrophilic
B) hydrophobic
C) isochoric
D) isothermal
A) hydrophilic

Question 137.
The non polar end in micelle is ……………. in nature.
A) hydrophilic
B) hydrophobic
C) isochoric
D) Isothermal
B) hydrophobic

Question 138.
The carboxyl end in micelle is …………….. in nature.
A) polar
B) non- polar
C) both
D) none of these