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What is the IUPAC name of the following compound?
The compound has a hydroxyl group on carbon 3 and a methyl group on carbon 4 of the benzene ring.
Which of the following statement is NOT correct?
Chlorine exerts a -I effect (electron-withdrawing inductive effect) due to its higher electronegativity.
What is the number of primary carbon atom in the compound?
In the given bridged bicyclic compound, there are no primary carbon atoms as each carbon is connected to at least two other carbons.
Identify the group that exerts electron withdrawing resonance effect.
The -COOH group withdraws electrons through resonance by delocalizing the lone pair of the oxygen atom.
Identify non-benzenoid aromatic compound from the following.
Tropone is a non-benzenoid aromatic compound with a seven-membered ring containing one oxygen atom.
IUPAC name of the compound
The compound has a bromine atom on carbon 4 and methyl groups on carbons 1 and 2 of the benzene ring.
Identify heterocyclic compound from following.
Thiophene is a heterocyclic compound containing sulfur in its five-membered aromatic ring.
Which following structure represents carbonyl group?
The carbonyl group is represented by a carbon atom double-bonded to an oxygen atom, which is depicted in option D.
The process A-B→A⁺ + B⁻ illustrates:
Heterolytic cleavage results in the formation of a cation and an anion due to unequal sharing of electrons.
How many π-electrons are present in naphthalene to decide its aromaticity?
Naphthalene has two fused benzene rings, each contributing 4 π-electrons, totaling 10 π-electrons, which satisfies the 4n+2 rule for aromaticity (n=2).
Identify the compound that does not correctly match with its common name.
H₃C−CH−CH₃ is propane, not n-butane. n-Butane has four carbon atoms.
The hybridization and geometry observed for methyl carbocation is
Methyl carbocation (CH₃⁺) has sp² hybridization and a trigonal planar geometry.
Identify functional group present in ethers from following.
Ethers contain the -O- functional group where oxygen is connected to two alkyl or aryl groups.
What is the number of π electrons present in pyridine?
Pyridine has six π-electrons in its aromatic ring, satisfying the 4n+2 rule (n=1).
Which among the following statements is correct about inductive effect?
The inductive effect is the permanent displacement of electrons in a σ-bond resulting in the polarization of organic molecules.
Which among the following compounds is an amide?
CH₃CONH₂ is an amide as it contains the -CONH₂ functional group.
Which free radical from following is least stable?
The stability of free radicals decreases with the number of alkyl groups. Methyl radical (CH₃•) is the least stable.
Which among the following is heterocyclic aromatic compound?
The correct answer depends on the provided structures, but typically heterocyclic aromatic compounds contain heteroatoms like N, O, or S in the ring.
Which among the following is the correct bond line formula of 2,2,4-trimethylpentane?
The correct bond line formula shows methyl groups on carbons 2, 2, and 4 of the pentane chain.
The formula of second homologue of carboxylic acid is
The second homologue of carboxylic acid (after methanoic acid) is propanoic acid, CH₃CH₂COOH.
What is the IUPAC name of CH₂=CH-CH₂-Br?
The compound is allyl bromide, which is bromoprop-1-ene, with the double bond starting at carbon 1.
Which from following pairs of compounds is an example of position isomerism?
But-1-ene and But-2-ene are position isomers as the double bond is located at different positions.
Hyperconjugation is not observed in
Hyperconjugation requires overlapping of σ-bonds with an adjacent empty or partially filled orbital. Ethylene (CH₂=CH₂) does not exhibit hyperconjugation as it lacks the necessary σ-bonds for overlap.
Which among the following statements is NOT true about aliphatic compounds?
Saturated aliphatic compounds are generally resistant to oxidation and are not easily attacked by oxidizing agents unless specific conditions are met.
Which from following pairs of compounds is an example of metamerism?
Ethoxyethane and methoxypropane are metamers as they have the same molecular formula but different alkyl groups attached to the functional group.
Which among the following compounds is non-aromatic?
Cycloheptatriene is non-aromatic as it does not satisfy the 4n+2 rule for π-electrons (it has 6 π-electrons, which would require n=1.5, which is not an integer).
Which among the following is a characteristic feature of free radicals?
Free radicals are characterized by having one or more unpaired electrons.
Which among the following groups when attached to benzoic acid decreases its acidity?
The -OH group is an electron-donating group that increases electron density on the benzene ring, making the carboxylic acid less acidic.
Which from following properties is NOT exhibited by benzene?
Benzene is less dense than water and forms an upper layer when mixed with water, not a lower layer.
Which among the following is electron deficient compound?
BCl₃ is electron-deficient as boron has only six electrons in its valence shell, lacking a complete octet.
Which among the following compounds is non-aromatic?
Cycloheptatriene is non-aromatic as it does not satisfy the 4n+2 rule for π-electrons (it has 6 π-electrons, which would require n=1.5, which is not an integer).
Which among the following statements is NOT true about pyridine?
Pyridine is aromatic with six π-electrons, satisfying the 4n+2 rule (n=1).
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