CHM102 TMA Questions

CHM102 List of Questions

Q1 The saturated hydrocarbons contain the carbon and hydrogen atoms linked to each other by single bonds and are called ______________.
Alkanes
Alkenes
Alkynes
Aromatics

Q2 The _____________ provide a backbone to which various functional groups may be attached to yield an enormous variety of organic compounds.
Isomers
Structural formula
Bonds
Hydrocarbons

Q3 _____________are the compounds that have identical molecular formulas but differ in the ways in which the atoms are bonded to each other.
Alkenes
Alkanes
Isomers
Monomers

Q4 Compounds that differ from each other in their molecular formulas by the unit –$$[CH_{2}]$$- are called members of a ________________ series.
Heterologous
Homologous
Isomeric
None of the above

Q5 In allene the central atom is———– hybridized and the terminal atoms are ————– hybridized
$$Sp^{2},Sp^{3}$$
Sp, $$Sp^{2}$$
Sp, $$Sp^{3}$$
$${Sp^{2}$$,Sp

Q6 The addition of ozone to an alkyne produces _________.
ozonede
Ozonade
Ozonide
None of the above

Q7 The reaction between an alkyl halide and sodium metal to form an alkane is called _______ reaction.
Kolbe
Diels-Alder
Wurtz
Wittig

Q8 A benzene ring with a methyl group at position one and nitro group at position three is _________
p−nitrotoluene
p−nitroxylen
o−nitroaniline
o−nitrobenzene

Q9 The first product in fractionation of petroleum is called _________.
Gasoline
Natural gas
Light petrol
Paraffin

Q10 Increase in number of carbon atoms results in the following effects EXCEPT ________.
Surface area increases
Boiling point increases
Intermolecular forces increases
Melting point increases

Q11 A catalyst mixed with a selective inhibiting agent is called ________ catalyst.
Basic
Neutral
Poisoned
Acidic

Q12 Reactions that lead to the attachment of an alkyl group to a molecular fragment are called ____________.
dealkylation
esterification
carboxylation
alkylation

Q13 In the __________ alkynes, the triple bond lies at the end of the carbon chain.
Internal
external
terminal
interim

Q14 Hydrocarbons can be classified as _______________.
alkane, alkene, alkyne
amine, amide, imine
ester, ketone, aldehyde
aliphatic, alicyclic, aromatic

Q15 __________ best describes the functional group of an alkene.
C─C
C=C
C=O
C≡C

Q16 ________ can be defined as an atom or group of atoms in a molecule which exhibits characteristic chemical properties
hybridization
functional group
covalent bond
ionic bonding

Q17 Addition of ethyne to sodamide in ether yields sodium etynide and one of the following compounds
ammonia
water
Hydrogen sulphide
ethane

Q18 All but one of these is involved in alkylation
ethyne
sodium amide
Grignard reagent
Diels-Alder reagent

Q19 One of the statements is not true of dienes.
They general formula Cn H2n-2
They are called diolefins
They are isomeric with alkynes
divided into two main classes depending on the relative positions of the two double bonds in the molecule:

Q20 One of these statements is not true
Alkanes burn in excess of air or oxygen to give carbonmonoxide and water
Combustion is highly exothermic
the heat of combustion of pentane is 2549 KJmol-1
Combustion is the most important reaction of alkanes

Q21 The earliest nomenclature of the organic compounds were based on?
Characteristic fragrance only
Their origin or properties
Chemical and physical properties
Aroma, fragrance and smell

Q22 An aromatic compound which contained side chain hydroxyl group is called?
Phenol
Aromatic alcohol
Hydroxybenzen
Aryl halide

Q23 In alcohol in which the oxygen atom is replaced by a sulphur atom is called?
Sulphuric acid
Sulfhydryl
Sulphurnol
Thiol

Q24 Depending on the number of alkyl group attached to the nitrogen atom, the amines are classified as?
Imine, amino and amide
Saturated unsaturated and partially saturated
Primary, secondary and tertiary amines
First degree, second degree and third degree amines

Q25 When a compound has carbon-nitrogen triple bond it is called?
Amino
Nitrile
Imine
Amine

Q26 When a compound has carbon-nitrogen double bond it is called?
Imine
Amino
Amine
Nitrile

Q27 When a compound has a carbon-nitrogen single bond it is called?
Nitrile
Imine
Nitrite
amine

Q28 Benzene is an example of which type of hydrocarbon?
Alicyclic hydrocarbon
Arene hydrocarbon
Aromatic hydrocarbon
Alkene hydrocarbon

Q29 The hydrocarbons are broadly classified into___?
Alkane, alkene and alkyne
Aliphatic, alicyclic and aromatic
Alicyclic, heterocyclic and aromatic
Saturated, unsaturated and aromatic

Q30 A functional group can be defined as?
An atom or group of atoms in a molecule which exhibit a characteristic chemical properties
An atom or group of atoms in a molecule which exhibit a characteristic physical properties
A group of atoms in a molecule which exhibit a characteristic chemical properties
An atom in a molecule which exhibit a characteristic chemical properties

Q31 What is the functional group of esters?
$$─COOCO─$$
$$─COOH$$
$$─CHO$$
RCOOR’

Q32 What is the functional group of aldehyde?
$$─COO─$$
$$C─C=O$$
$$─CHO$$
RCHO

Q33 -OH is a functional group for which organic compound?
Ketone
Alcohol
Base
Acid

Q34 Grouping organic compounds base on their functional groups makes it easier to understand their_______?
Chemical properties only
Physical properties only
Structural properties only
Physical and chemical properties

Q35 Choose the correct option that best indicate the hybrid orbitals type, bond length and bond angle for acetylene?
$$SP{^2}$$, 134 pm and $$120{^o}$$
$$SP{^3}$$, 154 pm and 190.5{^o}$$
$$SP{^2}$$, 120 pm and $$180{^o}$$
SP, 120 pm and $$180{^o}$$

Q36 Choose the correct option that best indicate the hybrid orbitals type, bond length and bond angle for methane.
$$SP{^3}$$, 154 pm and $$190{^o}$$
SP, 134 and 180o
SP{^2}$$, 134 pm and 120{^o}$$
$$SP{^3}$$, 134 pm and$$ 120{^o}$$

Q37 Indicate the corresponding bond resulting from $$SP{^3}$$, $$SP{^2}$$ and SP hybridization
Triple bond, double bond and single bond.
Single bond, double bond and triple bond.
Double bond, single bond and triple bond
Single bond, triple bond and double bond

Q38 Which of these statements is correct?
Pi bonds are formed by sideways overlap of p-orbitals.
Sigma bonds are formed by the edge-on overlap of pure S and P hybrid orbitals
The electron density in sigma bond is maximum along the inter-nuclear axis
All of the above

Q39 The bond energy C─C is equivalent to?
$$348 Kjm{^-1}$$
$$341 Kjmol{^-1}$$
$$415 Kjmol{^-1}$$
$$433 Kjmol{^-1}$$

Q40 What is the measure of the length of C─C bond?
154 pm
154 cm
164 cm
164 pm

Q41 The relationship between bond length and bond order is ___________.
Bond order decreases as bond length decreases
Bond order increases as bond length decreases
Bond order increases as bond length increases
Bond order decreases as bond length increases

Q42 ____________ is how a sigma (δ) bond is formed.
edge-on overlap of p orbitals
sideways overlap of p orbitals
sideways overlap of s and p orbitals
edge-on overlap of pure s and p orbitals

Q43 Which of these theoretical concept enables realistic modelling of molecular structure?___
hybridization
ionization
substitution
hydrogenation

Q44 A benzene ring with a methyl group at position one and nitro group at position three is _____?
o−nitrobenzene
p−nitroxylene
p−nitrotoluene
o−nitroaniline

Q45 Which of these compounds have a benzene ring with a methyl group at position one?
Anisole
Toluene
Phenol
Aniline

Q46 In _____________ compounds, the molecules are formed by the sharing of electron pairs between the constituent atoms.
non-covalent
electrovalent
ionic
covalent

Q47 When alkene reacts with borane, addition to the$$ C=C$$ takes place to yield organoborane a compound with a carbon-boron bond, the reaction is known as ____________________.
hydroboration
hydrohalogenation
halogenation
hydrogenation

Q48 Rapid decolourization of bromine solution serves as a test for the presence of the ___________________ in a compound.
$$C=O$$
$$C-C$$
$$C=C$$
$$C≡C$$

Q49 Alkyl halides are converted into alkenes by _______________, by treating with a strong base.
hydrogenation
dehydrogenation
alkylation
acylation

Q50 __________________ involves elimination of the halogen atom together with a hydrogen atom from an adjacent carbon atom.
hydrohalogenation
Dihydrohalogenation
halogenation
Dehydrohalogenation

Q51 Reactions that lead to the attachment of alkyl group to a molecular fragment are called ____________________________.
Nucleophillic reaction
Addition reaction
Acylation reaction
Alkylation reaction

Q52 The terminal alkynes on hydroboration give _________________________.
aldehydes
ketones
alkenes
alkanes

Q53 In _________________ reaction, a conjugated diene is treated with an unsaturated compound called dienophile to yield a cyclic system.
Diels-Alder reaction
Wittig reaction
Wurtz reaction
Kolbe electrolytic reaction

Q54 ‘Undecane’ is a straight chain alkane containing how many carbon atoms?
9
10
11
12

Q55 A member of a homologue series must poses a similar structure but differ in the ___ repeating unit.
$$─CH{_4─}$$
$$─CH{_3─}$$
$$─CH{_2}─$$
$$─CH─$$

Q56 The number of possible isomers of an alkane increases with increase in number of carbon atoms. True or false.
Inconclusive
Partially true
False
True

Q57 Iso-butane means?
Straight chain butane
Branched butane
Conjugated butane
Straight chain butanol

Q58 n-butane means?
Straight chain butane
Straight chain butanol
Conjugated butane
Branched butane

Q59 What are isomers?
Are compound of the same molecular weight but different chemical properties
Are compounds having identical chemical properties but different molecular weight.
Are compounds having the same molecular formula but different structural presentation
Are compounds that have the same molecular formula and the same structural presentation

Q60 ____________ determines the number of hybrid orbitals generated.
Number of shells
Number of atomic orbitals
Number of electrons
Number of electrons

Q61 The relationship between bond length and bond order is ___________.
Bond order decreases as bond length decreases
Bond order increases as bond length decreases
Bond order increases as bond length increases
Bond order decreases as bond length increases

Q62 ____________ is how a sigma (δ) bond is formed.
edge-on overlap of p orbitals
sideways overlap of p orbitals
sideways overlap of s and p orbitals
edge-on overlap of pure s and p orbitals

Q63 Which of these theoretical concept enables realistic modelling of molecular structure?___
hybridization
ionization
substitution
hydrogenation

Q64 A benzene ring with a methyl group at position one and nitro group at position three is _____?
o−nitrobenzene
p−nitroxylene
p−nitrotoluene
o−nitroaniline

Q65 Which of these compounds have a benzene ring with a methyl group at position one?
Anisole
Toluene
Phenol
Aniline

Q66 In _____________ compounds, the molecules are formed by the sharing of electron pairs between the constituent atoms.
non-covalent
electrovalent
ionic
covalent

Q67 When alkene reacts with borane, addition to the$$ C=C$$ takes place to yield organoborane a compound with a carbon-boron bond, the reaction is known as ____________________.
hydroboration
hydrohalogenation
halogenation
hydrogenation

Q68 Rapid decolourization of bromine solution serves as a test for the presence of the ___________________ in a compound.
$$C=O$$
$$C-C$$
$$C=C$$
$$C≡C$$

Q69 Alkyl halides are converted into alkenes by _______________, by treating with a strong base.
hydrogenation
dehydrogenation
alkylation
acylation

Q70 __________________ involves elimination of the halogen atom together with a hydrogen atom from an adjacent carbon atom.
hydrohalogenation
Dihydrohalogenation
halogenation
Dehydrohalogenation

Q71 Reactions that lead to the attachment of alkyl group to a molecular fragment are called ____________________________.
Nucleophillic reaction
Addition reaction
Acylation reaction
Alkylation reaction

Q72 The terminal alkynes on hydroboration give _________________________.
aldehydes
ketones
alkenes
alkanes

Q73 In _________________ reaction, a conjugated diene is treated with an unsaturated compound called dienophile to yield a cyclic system.
Diels-Alder reaction
Wittig reaction
Wurtz reaction
Kolbe electrolytic reaction

Q74 ‘Undecane’ is a straight chain alkane containing how many carbon atoms?
9
10
11
12

Q75 A member of a homologue series must poses a similar structure but differ in the ___ repeating unit.
$$─CH{_4─}$$
$$─CH{_3─}$$
$$─CH{_2}─$$
$$─CH─$$

Q76 The number of possible isomers of an alkane increases with increase in number of carbon atoms. True or false.
Inconclusive
Partially true
False
True

Q77 Iso-butane means?
Straight chain butane
Branched butane
Conjugated butane
Straight chain butanol

Q78 n-butane means?
Straight chain butane
Straight chain butanol
Conjugated butane
Branched butane

Q79 What are isomers?
Are compound of the same molecular weight but different chemical properties
Are compounds having identical chemical properties but different molecular weight.
Are compounds having the same molecular formula but different structural presentation
Are compounds that have the same molecular formula and the same structural presentation

Q80 ____________ determines the number of hybrid orbitals generated.
Number of shells
Number of atomic orbitals
Number of electrons
Number of electrons

Q81 Explain why the bonds formed in $$SP{^3}$$ hybrid orbitals are stronger and stable compare to the bonds formed by using pure atomic orbitals?
The lobes in $$SP{^3}$$ hybrid orbitals are separated by anode.
In $$SP{^3}$$ hybrid orbital, the electron density is concentrated in one direction leading to greater overlap.
$$SP{^3}$$ hybrid orbitals are similar to p orbitals.
$$SP{^3}$$ hybrid orbitals have two lobes of unequal sizes

Q82 When molecules are formed it can be deduced that?
There was donation of electrons by one atom to another.
There was sharing of electron pair between atoms.
There was a molecular orbital interaction
All of the above options

Q83 Who proposed the model of orbital hybridization?
Bronsted
kekule
Pouline
Lewis

Q84 The name of the compound whose structure appeared here $$CH{_3}(CH{_2}){_6}CH{_3}$$ is ___.
Propane
Hexane
Butane
Octane

Q85 The formula $$CH{_3}CH{_3}$$ represents the ________for ethane.
Condense structure
Spatial structure
Lewis structure
Ficher-trops structure

Q86 The structure which shows how various atoms are connected to each other is called?
Fischer structure
Lewis structure
Condense structure
spatial structure

Q87 These two factors can affect the shape of a molecule in covalent bonding
Temperature and pressure
Molecular size and atomic size
Bond length and bond angle
Bond length and bond energy

Q88 When is bond dissociation equals bond energy
molecule is complex
molecule is triatomic
molecule is monoatomic
molecule is diatomic

Q89 what type of energy change is experienced when covalent bonds are formed?
release of energy
sharing of energy
Dissociation of energy
Absorption of energy

Q90 Which of these statements is correct?
$$(Ï€)$$ bond is formed by Edge on overlap of p orbitals
the electron density in sigma $$(δ)$$ bond is maximum along the internuclear axis
the electron density in Pi$$ (Ï€)$$ bond is maximum along the internuclear axis
the electron density in sigma $$(δ)$$ bond is maximum at the above and below the internuclear axis

Q91 Which of these shows how a sigma $$(Ï€)$$ bond is formed.
sideway overlap of S and P orbitals
Edge on overlap of p orbitals
sideway overlap of p orbitals
edge on overlaps of pure S and P orbitals

Q92 Which of these shows how a sigma $$(δ)$$ bond is formed.
sideway overlap of S and P orbitals
Edge on overlap of p orbitals
sideway overlap of p orbitals
edge on overlaps of pure S and P orbitals

Q93 Which of these is a methylbenzen compound?
Phenol
Toluene
aniline
floroanisole

Q94 the following compounds are not $$Sp^{2}$$ hybridized except?
alkene
alkyne
alkane
alkyl

Q95 Below are factors affecting bond lenth of a compound except?
presence of double bond
presence of single bond
presence of side group
types of bonded atoms

Q96 The rapid decolouration of bromine is a test method which determined the presence of what?
$$C=O$$ Bond
$$C-C$$ bond
$$C=C$$ bond
$$C≡C$$ bond

Q97 The process by which alkyl halides are converted to alkenes in the presence of strong base is called?
Alkylation
Dehydrogenation
Hydrogenation
Acylation

Q98 Alkylation reaction is a reaction that leads to the attachment of ______ on a molecular fragment.
Acyl group
alkyl group
alkenyl group
methyl group

Q99 The hydroboration of terminal alkynes gives?
alkanes
alkenes
aldehyde
ketones

Q100 When a conjugated diene is treated with an unsaturated compound called dienophile to yield a cyclic system the reaction process is called.
Diels-Alder reaction
Wittig reaction
Wurtz reaction
Frieldel Craft reaction

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