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NEET Questions / Chemistry / Classification of Elements and Periodicity in Properties
Explain the relationship between electronegativity and the tendency of an element to form an ionic bond.
A small difference in electronegativity between two atoms favors the formation of an ionic bond.
A large difference in electronegativity between two atoms favors the formation of a covalent bond.
Electronegativity has no relationship to the type of bond formed.
A large difference in electronegativity between two atoms favors the formation of an ionic bond.
Which of the following is NOT a fundamental characteristic of living organisms according to NCERT?
Growth
Reproduction
Metabolism
Entropy
A scientist observes a newly discovered entity that exhibits growth, reproduction, and response to stimuli but lacks a defined cellular structure. Based on NCERT's definition of life, which statement is most accurate?
The entity is unequivocally a living organism due to exhibiting key life processes.
The entity is a non-living entity as all life must possess a cellular structure.
The entity's status as a living organism is ambiguous as it lacks a key defining feature.
The entity represents a pre-cellular life form demonstrating the evolution of life.
Which hierarchy of biological organization is correctly ordered from simplest to most complex according to NCERT?
Organelle, Macromolecule, Cell, Tissue, Organ, Organ System, Organism
Macromolecule, Organelle, Cell, Tissue, Organ System, Organ, Organism
Macromolecule, Organelle, Cell, Tissue, Organ, Organ System, Organism
Cell, Macromolecule, Organelle, Tissue, Organ, Organ System, Organism
According to NCERT, the most defining characteristic distinguishing living organisms from non-living matter is:
The ability to respond to external stimuli
The capacity to perform metabolic reactions
The presence of self-replicating molecules enabling inheritance and evolution
The exhibition of growth and development
Which branch of biology specifically deals with the identification, nomenclature, and classification of organisms as described in NCERT?
Ecology
Physiology
Taxonomy
Morphology
Which statement best describes the relationship between biodiversity and taxonomy according to NCERT?
Biodiversity hinders taxonomic efforts by creating an overwhelming number of organisms to classify.
Taxonomy and biodiversity are independent fields with minimal interaction.
Taxonomy provides the framework for organizing and understanding the vast diversity of life.
Biodiversity is a subset of taxonomy, focusing specifically on species richness.
Which of the following statements regarding the electron affinity trends across a period and down a group is INCORRECT?
Electron affinity generally becomes more negative across a period due to increasing effective nuclear charge.
Electron affinity always becomes more negative down a group due to increasing atomic size.
Noble gases have positive electron affinities.
Electron affinity values can be influenced by interelectronic repulsions.
Why is the electron affinity of nitrogen less negative than that of carbon, despite nitrogen having a higher effective nuclear charge?
Nitrogen has a smaller atomic radius than carbon.
Nitrogen has a half-filled p subshell, which provides extra stability.
Carbon has a higher electronegativity than nitrogen.
The electron added to nitrogen experiences greater shielding.
