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The high polarity of the carbonyl group can be explained by resonance involving which types of structures?
The text states, 'The high polarity of the carbonyl group is explained on the basis of resonance involving a neutral (A) and a dipolar (B) structures as shown.'
In a carbonyl group, the $\pi$-electron cloud is located:
The NCERT states, '...the $\pi$-electron cloud is above and below this plane.' referring to the plane formed by the carbonyl carbon and its attached atoms.
What is the primary role of the fourth valence electron of carbon in a carbonyl group?
The text specifies, 'The fourth valence electron of carbon remains in its p-orbital and forms a $\pi$-bond with oxygen by overlap with p-orbital of an oxygen.'
Which of the following functional groups contains a carbon-oxygen double bond?
The introductory part of the chapter mentions, 'In this Unit, we will study about the organic compounds containing carbon-oxygen double bond (>C=O) called carbonyl group...'
How do aldehydes differ from ketones based on the atoms bonded to the carbonyl group?
The NCERT states, 'In aldehydes, the carbonyl group is bonded to a carbon and hydrogen while in the ketones, it is bonded to two carbon atoms.'
Which statement regarding the number of non-bonding electron pairs on the oxygen atom in a carbonyl group is correct?
The text states, 'In addition, the oxygen atom also has two non-bonding electron pairs.'
The carbonyl carbon and the three atoms attached to it lie in the same plane. This arrangement is a characteristic of:
The NCERT states, 'Thus, the carbonyl carbon and the three atoms attached to it lie in the same plane and the p-electron cloud is above and below this plane. The bond angles are approximately 120° as expected of a trigonal coplanar structure.'
Which of the following resonance descriptions is implied when explaining the high polarity of the carbonyl group?
The context mentions, 'The high polarity of the carbonyl group is explained on the basis of resonance involving a neutral (A) and a dipolar (B) structures as shown.' The dipolar structure (B) would typically show a positive charge on carbon and a negative charge on the more electronegative oxygen.
What is the common feature of aldehydes, ketones, and carboxylic acids?
The summary explicitly states, 'Aldehydes, ketones and carboxylic acids are some of the important classes of organic compounds containing carbonyl group.'
Which of the following describes a diamagnetic substance's behavior when placed in an external magnetic field?
According to the context (MAGNETISM_AND_MATTER), "Diamagnetic substances are those which have tendency to move from stronger to the weaker part of the external magnetic field. In other words, unlike the way a magnet attracts metals like iron, it would repel a diamagnetic substance." This indicates weak repulsion by the magnetic field.
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.