Q1
What is the general chemical formula for acyclic saturated hydrocarbons (alkanes)?
What is the general chemical formula for acyclic saturated hydrocarbons (alkanes)?
(C)
$C_n H_{2n-2}$
(D)
$C_n H_{2n-6}$
(A)
$C_n H_{2n+2}$
(B)
$C_n H_{2n}$
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Complete Syllabus Question Paper
Grade 11 : Chemistry - Hydrocarbons (Set 2) | Concept of Maths— Questions & Detailed Solutions
Q2
Which of the following is the simplest alkane?
Which of the following is the simplest alkane?
(A)
Ethane
(B)
Methane
(C)
Propane
(D)
Butane
Q3
What hybridization state is exhibited by all carbon atoms in an alkane molecule?
What hybridization state is exhibited by all carbon atoms in an alkane molecule?
(D)
$dsp^2$
(B)
$sp^2$
(A)
sp
(C)
$sp^3$
Q4
Alkanes are historically referred to by which traditional name owing to their low chemical reactivity?
Alkanes are historically referred to by which traditional name owing to their low chemical reactivity?
(A)
Olefins
(C)
Acetylenes
(D)
Arenes
(B)
Paraffins
Q5
What is the correct IUPAC name of the unbranched hydrocarbon $\text{CH}_3-\text{CH}_2-\text{CH}_2-\text{CH}_3$?
What is the correct IUPAC name of the unbranched hydrocarbon $\text{CH}_3-\text{CH}_2-\text{CH}_2-\text{CH}_3$?
(D)
Butane
(A)
Methane
(B)
Ethane
(C)
Propane
Q6
What is the ideal $\text{H-C-H}$ bond angle in a methane ($\text{CH}_4$) molecule?
What is the ideal $\text{H-C-H}$ bond angle in a methane ($\text{CH}_4$) molecule?
(D)
$180^\circ$
(A)
$90^\circ$
(B)
$120^\circ$
(C)
$109.5^\circ$
Q7
Which general formula represents open-chain alkenes containing a single double bond?
Which general formula represents open-chain alkenes containing a single double bond?
(B)
$C_n H_{2n}$
(D)
$C_n H_{2n-4}$
(C)
$C_n H_{2n-2}$
(A)
$C_n H_{2n+2}$
Q8
What is the general formula for acyclic alkynes with one carbon-carbon triple bond?
What is the general formula for acyclic alkynes with one carbon-carbon triple bond?
(B)
$C_n H_{2n}$
(C)
$C_n H_{2n-2}$
(A)
$C_n H_{2n+2}$
(D)
$C_n H_{2n+4}$
Q9
What is the hybridization state of triply bonded carbon atoms in an alkyne?
What is the hybridization state of triply bonded carbon atoms in an alkyne?
(A)
$sp^3$
(C)
sp
(B)
$sp^2$
(D)
$sp^3d$
Q10
Which hydrocarbon gas is commonly known as marsh gas?
Which hydrocarbon gas is commonly known as marsh gas?
(D)
Benzene
(A)
Methane
(C)
Acetylene
(B)
Ethylene
Q11
Chlorination of methane in the presence of sunlight proceeds via which reaction mechanism?
Chlorination of methane in the presence of sunlight proceeds via which reaction mechanism?
(D)
Electrophilic substitution
(B)
Free radical substitution
(A)
Electrophilic addition
(C)
Nucleophilic substitution
Q12
Which empirical rule predicts the major product when an unsymmetrical reagent adds to an unsymmetrical alkene?
Which empirical rule predicts the major product when an unsymmetrical reagent adds to an unsymmetrical alkene?
(D)
Pauli's Principle
(B)
Markovnikov's Rule
(C)
Hund's Rule
(A)
Saytzeff's Rule
Q13
What is the systematic IUPAC name of $\text{CH}_2=\text{CH}-\text{CH}_3$?
What is the systematic IUPAC name of $\text{CH}_2=\text{CH}-\text{CH}_3$?
(B)
Propene
(C)
But-1-ene
(A)
Ethene
(D)
Ethyne
Q14
To which class of hydrocarbons does benzene ($\text{C}_6\text{H}_6$) belong?
To which class of hydrocarbons does benzene ($\text{C}_6\text{H}_6$) belong?
(C)
Aromatic hydrocarbons
(A)
Alkanes
(D)
Cycloalkanes
(B)
Alkenes
Q15
How many sigma ($\sigma$) and pi ($\pi$) bonds are present in an ethyne ($\text{HC}\equiv\text{CH}$) molecule?
How many sigma ($\sigma$) and pi ($\pi$) bonds are present in an ethyne ($\text{HC}\equiv\text{CH}$) molecule?
(C)
$4\,\sigma$ and $1\,\pi$
(A)
$3\,\sigma$ and $2\,\pi$
(D)
$5\,\sigma$ and $0\,\pi$
(B)
$2\,\sigma$ and $3\,\pi$
Q16
In Wurtz reaction, alkyl halides react with which metal in dry ether to form higher alkanes?
In Wurtz reaction, alkyl halides react with which metal in dry ether to form higher alkanes?
(B)
Sodium
(D)
Zinc
(C)
Magnesium
(A)
Calcium
Q17
What is the structural geometry of the benzene ($\text{C}_6\text{H}_6$) ring?
What is the structural geometry of the benzene ($\text{C}_6\text{H}_6$) ring?
(C)
Linear
(A)
Tetrahedral
(D)
Pyramidal
(B)
Planar hexagonal
Q18
Dehydrohalogenation of an alkyl halide using alcoholic $\text{KOH}$ yields which functional group?
Dehydrohalogenation of an alkyl halide using alcoholic $\text{KOH}$ yields which functional group?
(B)
Alkene
(C)
Alkyne
(A)
Alkane
(D)
Arene
Q19
According to Hückel's rule, a cyclic planar conjugated system is aromatic if it contains how many delocalized $\pi$-electrons?
According to Hückel's rule, a cyclic planar conjugated system is aromatic if it contains how many delocalized $\pi$-electrons?
(A)
$4n$
(C)
$(2n+2)$
(B)
$(4n+2)$
(D)
$(4n+1)$
Q20
Ozonolysis of propene ($\text{CH}_3-\text{CH}=\text{CH}_2$) followed by workup with $\text{Zn}/\text{H}_2\text{O}$ yields which pair of carbonyl compounds?
Ozonolysis of propene ($\text{CH}_3-\text{CH}=\text{CH}_2$) followed by workup with $\text{Zn}/\text{H}_2\text{O}$ yields which pair of carbonyl compounds?
(A)
Methanal and Ethanal
(D)
Propanone and Water
(C)
Methanal and Propanal
(B)
Ethanal and Propanal
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