Q1
What is the hybridization of the central carbon atom in a methane ($CH_4$) molecule?
What is the hybridization of the central carbon atom in a methane ($CH_4$) molecule?
(A)
sp
(B)
$sp^2$
(C)
$sp^3$
(D)
$sp^3d$
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Complete Syllabus Question Paper
Grade 11 : Chemistry - Organic Chemistry Basics (Set 2)— Questions & Detailed Solutions
Q2
Which general formula represents the homologous series of acyclic alkanes?
Which general formula represents the homologous series of acyclic alkanes?
(A)
$C_nH_{2n}$
(B)
$C_nH_{2n+2}$
(C)
$C_nH_{2n-2}$
(D)
$C_nH_{2n-4}$
Q3
What is the IUPAC name for the straight-chain hydrocarbon $CH_3-CH_2-CH_2-CH_3$?
What is the IUPAC name for the straight-chain hydrocarbon $CH_3-CH_2-CH_2-CH_3$?
(A)
Propane
(B)
Butane
(C)
Pentane
(D)
Ethane
Q4
Which functional group is characteristic of aldehydes?
Which functional group is characteristic of aldehydes?
(A)
$-COOH$
(B)
$-OH$
(C)
$-CHO$
(D)
$>C=O$
Q5
Symmetrical cleavage (homolytic fission) of a covalent bond produces which of the following species?
Symmetrical cleavage (homolytic fission) of a covalent bond produces which of the following species?
(A)
Carbocations
(B)
Carbanions
(C)
Free radicals
(D)
Hydride ions
Q6
What is the geometry around a carbon atom that is $sp^3$ hybridized?
What is the geometry around a carbon atom that is $sp^3$ hybridized?
(A)
Linear
(B)
Trigonal planar
(C)
Tetrahedral
(D)
Octahedral
Q7
What is the IUPAC name of the compound $CH_3-CH(OH)-CH_3$?
What is the IUPAC name of the compound $CH_3-CH(OH)-CH_3$?
(A)
Propan-1-ol
(B)
Propan-2-ol
(C)
Propanone
(D)
Ethanol
Q8
Organic compounds having the same molecular formula but differing in spatial arrangement of atoms are known as:
Organic compounds having the same molecular formula but differing in spatial arrangement of atoms are known as:
(A)
Structural isomers
(B)
Stereoisomers
(C)
Isotopes
(D)
Homologs
Q9
What is the ideal bond angle around an $sp^2$ hybridized carbon atom in ethene ($C_2H_4$)?
What is the ideal bond angle around an $sp^2$ hybridized carbon atom in ethene ($C_2H_4$)?
(A)
$180^\circ$
(B)
$109.5^\circ$
(C)
$120^\circ$
(D)
$90^\circ$
Q10
Which of the following species acts as an electrophile in organic reactions?
Which of the following species acts as an electrophile in organic reactions?
(A)
$NH_3$
(B)
$OH^-$
(C)
$NO_2^+$
(D)
$CN^-$
Q11
Which homologous series of open-chain hydrocarbons is represented by the general formula $C_nH_{2n}$?
Which homologous series of open-chain hydrocarbons is represented by the general formula $C_nH_{2n}$?
(A)
Alkanes
(B)
Alkenes
(C)
Alkynes
(D)
Alkanols
Q12
Two consecutive members of a homologous series differ in molecular formula by a:
Two consecutive members of a homologous series differ in molecular formula by a:
(A)
$-CH_3-$ unit
(B)
$-CH_2-$ unit
(C)
$-CH_4-$ unit
(D)
$-C_2H_2-$ unit
Q13
Heterolytic fission of a polar covalent $C-Cl$ bond in an alkyl chloride yields:
Heterolytic fission of a polar covalent $C-Cl$ bond in an alkyl chloride yields:
(A)
Two neutral free radicals
(B)
A carbocation and a chloride ion ($Cl^-$)
(C)
A carbanion and a chlorine radical
(D)
Two negatively charged ions
Q14
What is the systematic IUPAC name for $CH_3-CHO$?
What is the systematic IUPAC name for $CH_3-CHO$?
(A)
Methanal
(B)
Ethanal
(C)
Propanal
(D)
Ethanol
Q15
Ethanol ($CH_3-CH_2-OH$) and dimethyl ether ($CH_3-O-CH_3$) share the formula $C_2H_6O$. They represent:
Ethanol ($CH_3-CH_2-OH$) and dimethyl ether ($CH_3-O-CH_3$) share the formula $C_2H_6O$. They represent:
(A)
Chain isomers
(B)
Position isomers
(C)
Functional group isomers
(D)
Metamers
Q16
Which organic reaction intermediate is characterized by a negatively charged carbon atom with eight valence electrons?
Which organic reaction intermediate is characterized by a negatively charged carbon atom with eight valence electrons?
(A)
Carbocation
(B)
Carbanion
(C)
Free radical
(D)
Carbene
Q17
How many total sigma ($\sigma$) and pi ($\pi$) bonds are present in an ethyne ($H-C \equiv C-H$) molecule?
How many total sigma ($\sigma$) and pi ($\pi$) bonds are present in an ethyne ($H-C \equiv C-H$) molecule?
(A)
$3\ \sigma$ and $2\ \pi$
(B)
$2\ \sigma$ and $3\ \pi$
(C)
$4\ \sigma$ and $1\ \pi$
(D)
$5\ \sigma$ and $0\ \pi$
Q18
What functional group defines carboxylic acids?
What functional group defines carboxylic acids?
(A)
$-CHO$
(B)
$-CO-$
(C)
$-COOH$
(D)
$-OH$
Q19
A chemical species capable of donating an electron pair to form a covalent bond is termed a(n):
A chemical species capable of donating an electron pair to form a covalent bond is termed a(n):
(A)
Electrophile
(B)
Nucleophile
(C)
Free radical
(D)
Carbocation
Q20
What is the IUPAC name of acetone ($CH_3-CO-CH_3$)?
What is the IUPAC name of acetone ($CH_3-CO-CH_3$)?
(A)
Propanal
(B)
Propan-2-one
(C)
Ethanoic acid
(D)
Butanone
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