UGC NET Questions (Paper – 1)

Statements A, B, C and D correctly summarise standard relationships on the traditional square of opposition, whereas E is false. Contradictory propositions cannot both be true and cannot both be false, and contraries cannot both be true but may both be false. “All S are P” versus “No S are P” are contraries, while “All S are P” versus “Some S are not P” are contradictories. The pair “Some S are P” and “No S are P” are also contradictories, not contraries, making E the only wrong statement.

Option A:
Option A is incorrect because it includes D as wrong along with E, but D accurately states a classic contradictory pair. Treating both D and E as wrong would misrepresent the structure of the square of opposition.

Option B:
Option B is also wrong since it marks C as wrong along with E, even though C correctly identifies “All S are P” and “No S are P” as contraries. C and E only therefore misclassifies a true statement as false.

Option C:
Option C is correct because it isolates E, the misidentified pair of contraries, as the sole incorrect statement and leaves the accurate descriptions in A, B, C and D untouched. This matches standard logic used in UGC NET preparation.

Option D:
Option D is incorrect as it groups C and D with E, thereby wrongly casting doubt on correctly named contrary and contradictory pairs. C, D and E only thus fails to preserve reliable information about AEIO relations.

Content validity concerns whether the items in a test or questionnaire are representative of the entire domain of content they are supposed to measure, such as a course syllabus or topic area. Subject experts often review the instrument to judge whether important areas are adequately sampled. High content validity reduces the chance that important facets of the construct are omitted. Therefore, the coverage-focused validity described in the stem is correctly called content validity.

Option A:
Option A, content validity, is especially important in achievement tests where missing topics can bias scores. When an instrument aligns well with specified learning outcomes or a blueprint, it demonstrates strong content validity, matching the stem exactly.

Option B:
Construct validity addresses whether the instrument truly measures the underlying theoretical construct, based on patterns of relationships with other variables and factor structure. It goes beyond simple content coverage, so it is not the best fit for this question.

Option C:
Criterion-related validity evaluates how well test scores correlate with an external criterion, such as job performance or future grades. It deals with predictive or concurrent accuracy rather than domain coverage. Hence, it is not appropriate here.

Option D:
Face validity refers to the extent to which a test appears to measure what it claims to, based on superficial inspection by users. It does not involve systematic analysis of content coverage, so it is not the correct answer.

Among greenhouse gases emitted by human activities, carbon dioxide contributes the most to anthropogenic global warming in terms of total radiative forcing. It is released mainly from burning fossil fuels, deforestation and industrial processes. Although other gases like methane and nitrous oxide have higher warming potential per molecule, their concentrations and total forcing are lower. Hence, carbon dioxide is regarded as the primary driver of the enhanced greenhouse effect, making option D correct.

Option A:
Option A, nitrous oxide, is a potent greenhouse gas but its atmospheric concentration and total contribution to warming are smaller compared to carbon dioxide. It is significant in agriculture and industry, yet not the largest contributor overall.

Option B:
Option B, methane, has a higher global warming potential than carbon dioxide per unit mass but is present in much lower concentrations. Its total radiative forcing is less than that of carbon dioxide, so it is not the largest contributor to anthropogenic warming.

Option C:
Option C, chlorofluorocarbons, are powerful greenhouse gases and ozone-depleting substances, but due to regulation under the Montreal Protocol, their emissions have declined. Their overall contribution is less than that of carbon dioxide.

Option D:
Option D is correct because carbon dioxide is emitted in very large quantities from energy, transport and land-use change. Its long atmospheric lifetime and cumulative build-up make it the major contributor to human-induced climate change.

Statements A, B, C and E accurately represent key aspects of open access and repositories. Open access removes paywall barriers for readers, some models shift costs to authors or institutions, repositories can host versions of articles and openness can broaden readership and potential citations. Statement D is false because many open access journals are peer reviewed just like subscription journals. Thus, the combination including A, B, C and E while excluding D is correct.

Option A:
Option A is incomplete because it omits E, overlooking the impact of open access on reach and citation, which is often a major justification for choosing this route. Without E, benefits appear limited to access alone.

Option B:
Option B is wrong as it leaves out A and includes only B, C and E. While those are true, excluding A fails to state the central feature that articles are freely accessible to readers.

Option C:
Option C is correct because it gathers the full set of accurate statements about open access models, repositories and potential impact, while rejecting the idea in D that open access means no peer review.

Option D:
Option D is incorrect since it incorporates D and omits B, implying that open access is inherently non-peer-reviewed and ignoring article processing charges as a common funding mechanism.

Statements A, C and D are correct, whereas B is incorrect. A is true because most models of listening describe it as a sequence of receiving, constructing meaning and responding. C is true since what a listener already knows shapes how they interpret new information. D is true as nodding, eye contact and other non-verbal cues show attention and form part of active listening. B is false because hearing is a physiological process of sound reception, whereas listening is a psychological process involving attention and interpretation.

Option A:
Option A includes A and C only and omits D, failing to mention that non-verbal responses are integral to the listening process in interactive communication. Although A and C are correct, the option underplays the response component. Therefore A and C only is incomplete and cannot be accepted.

Option B:
Option B combines A, C and D and excludes B, which wrongly equates hearing and listening. It captures listening as a multi-stage, meaning-making and responsive activity. Because it lists all and only the correct statements, A, C and D only is the right answer.

Option C:
Option C groups C and D only and leaves out A, ignoring the core definition that listening involves receiving messages, not only interpreting and responding. While C and D are true aspects of listening, excluding A means the option does not present a full picture of the process. Hence C and D only is not valid.

Option D:
Option D treats all four statements as correct, including B, which confuses hearing with listening. This misrepresentation of basic concepts makes the combination logically inconsistent. Consequently A, B, C and D cannot be chosen.

NEP 2020 states that HECI will have four distinct verticals: National Higher Education Regulatory Council (NHERC), National Accreditation Council (NAC), Higher Education Grants Council (HEGC) and General Education Council (GEC). Each will focus on a specific function. This separation is meant to avoid conflicts of interest.

Option A:
This set correctly lists the four verticals proposed under HECI, matching the policy: NHERC for regulation, NAC for accreditation, HEGC for funding and GEC for academic standards.

Option B:
UGC, AICTE, NCTE and NCERT are existing bodies in higher or school education, but NEP 2020 does not designate them as the four HECI verticals.

Option C:
NTA, CBSE, NIOS and NCERT are mainly assessment and school-curriculum bodies, not the higher education regulatory verticals under HECI.

Option D:
RBI and SEBI are financial and securities-market regulators with no role in higher education governance; combining them with NHERC and GEC does not reflect the HECI structure.

Psychological barriers are internal states such as fear,shyness or low self esteem that block effective communication. The student in the stem knows the answer but remains silent due to fear of ridicule. This emotional factor stops the message from being shared. Therefore the barrier is psychological.

Option A:
Physical barriers relate to the environment rather than feelings.

Option B:
Mechanical barriers involve technical faults,not personal anxiety.

Option C:
The key factor is the student's emotional state,making psychological the correct answer.

Option D:
Semantic barriers come from confusion about meanings of words,which is not the issue here.

Stratified random sampling involves dividing the population into relatively homogeneous strata based on characteristics such as gender, region or discipline and then drawing random samples from each stratum. This ensures that important subgroups are adequately represented in the final sample. It can increase the precision of estimates, especially when subgroup differences are substantial. Because the stem mentions dividing the population into homogeneous subgroups and sampling from each, it describes stratified random sampling.

Option A:
Stratified random sampling uses random selection within each stratum, preserving probabilistic principles while controlling subgroup representation. This approach leads to a sample that mirrors the composition of the population with respect to chosen stratification variables. These features align exactly with the process outlined in the stem, making stratified random the correct answer.

Option B:
Simple random sampling selects units from the population without any prior subdivision, giving each element an equal chance of being chosen, but it does not guarantee representation of specific subgroups. Since the question specifies dividing the population into subgroups first, simple random is not the best match.

Option C:
Systematic sampling selects every kth element from an ordered list after a random start, without necessarily dividing the population into strata. Although it is a probability method, it does not follow the subgroup-based approach described in the stem. Therefore, systematic is not appropriate here.

Option D:
Cluster sampling divides the population into clusters, often based on natural groupings such as schools or villages, and then selects some clusters, usually sampling all or many elements within chosen clusters. Clusters are not necessarily homogeneous, and the method focuses on groups rather than ensuring representation from all subgroups. Thus, cluster sampling does not fit the description given.

Statements A, B and D correctly capture the role of higher education institutions in research and innovation. Statement A is true because universities host laboratories, research centres and faculty engaged in both basic and applied work. Statement B is correct in linking university research to innovation and knowledge-driven economic growth. Statement D is also true as policies actively encourage collaborations with industry and international partners, while statement C is false since universities themselves are major supervisors of doctoral research.

Option A:
Option A is incorrect because it includes only A and B and omits D. Collaborative research with industry and international partners is a significant trend in modern higher education, and excluding it makes the description incomplete. A fully correct combination must include D as well.

Option B:
Option B is incorrect because it combines A and D but leaves out B. Without acknowledging the contribution of research to economic development, the answer fails to reflect one of the key justifications for research investment in higher education. Therefore this option does not cover all the correct statements.

Option C:
Option C is correct because it brings together A, B and D, which together describe the institutional, economic and collaborative dimensions of research in higher education. By excluding C, it rejects the false claim that only specialised research institutes can guide doctoral work. This makes the combination consistent with the actual research landscape.

Option D:
Option D is incorrect because it includes C along with B and D. Statement C wrongly denies the central doctoral role played by universities, and its inclusion alongside correct statements makes the option unsound. Hence this combination cannot be chosen.

The positions of the letters are B(2), F(6), J(10), N(14) and R(18). Each term increases by 4 positions (2→6, 6→10, 10→14, 14→18). Continuing this rule, the next position is 18 + 4 = 22, which corresponds to the letter V. Thus V is the only option that maintains the constant step size of 4 in the sequence.

Option A:
Option A, T, corresponds to position 20, which is only 2 steps ahead of R at 18. This contradicts the observed increment of 4 positions between consecutive terms. Because it does not respect the uniform difference, T cannot be the correct continuation.

Option B:
Option B, U, stands at position 21, giving a difference of 3 from R. The sequence does not display variable increments; it keeps a consistent jump of 4. Since U does not satisfy this constant difference property, it fails to fit the pattern.

Option C:
Option C is correct because V is at position 22, exactly 4 places after 18. This preserves the arithmetic progression of positions and ensures that the series continues smoothly. Any deviation from this step size would change the core structure of the series, so V is the only valid next term.

Option D:
Option D, W, lies at position 23, which is 5 steps beyond R. This would increase the gap toward the end of the series without any indication of such change earlier. The absence of a growing difference in previous steps means W cannot be justified by the pattern.

The phrase “p if and only if q” asserts both “if p, then q” and “if q, then p”. In propositional logic, this two-way connection is expressed by the biconditional connective. A biconditional is true exactly when both components share the same truth value. Therefore the compound statement in the stem is called a biconditional.

Option A:
Option A, disjunction, joins statements with “or” and does not require them to share truth values. It lacks the two-way commitment of “if and only if”. Thus disjunction is not the correct answer.

Option B:
Option B, implication, represents the one-way conditional “if p, then q”. It does not capture the reverse implication from q to p. Hence implication alone does not fit the form described.

Option C:
Option C correctly names biconditional as the connective corresponding to “if and only if”. It combines two conditionals into a single equivalence statement. Therefore biconditional is the best choice here.

Option D:
Option D, negation, simply reverses the truth value of a single statement. It cannot express a mutual dependence between two propositions. Consequently negation is not suitable.

NEP 2020 advocates that students should have significant choice in the subjects and courses they study. A choice-based credit system enables them to select majors, minors and electives from various disciplines while meeting programme requirements. This enhances autonomy and matches their interests and career plans.

Option A:
A single fixed curriculum would severely limit student autonomy and contradict the policy’s emphasis on flexibility and multidisciplinary learning.

Option B:
This option correctly identifies flexible credit based curricula and electives as mechanisms for academic freedom. It fits the NEP vision of student centred higher education and is therefore correct.

Option C:
Non credit activities are useful but cannot replace academic course choice. NEP wants flexibility within credit bearing programmes, not just in co curricular areas.

Option D:
Allowing corporate sponsors to dictate curriculum without academic oversight could compromise educational integrity. NEP emphasises university autonomy, so this option is inconsistent.

A gives the defining properties: reflexive, symmetric and transitive. C (equality) and D (congruence modulo n) are classic examples satisfying these properties. B is false because reflexivity cannot be dropped. E is false because equivalence classes can contain multiple elements (e.g., congruence classes modulo n). Therefore A, C and D only are correct.

Option A:
Option A is correct since it includes the definition and two standard examples while excluding B and E, which are false.

Option B:
Option B is incomplete because it ignores D, leaving out an important arithmetic example.

Option C:
Option C is wrong because it includes E, which incorrectly claims all equivalence classes are singletons.

Option D:
Option D is incorrect because it omits A, which states the defining criteria of an equivalence relation.

The null hypothesis, usually denoted H0, asserts that any observed difference or relationship in sample data is due to chance alone and that there is no real effect in the population. It provides a baseline assumption that statistical tests attempt to reject. Decisions about significance are made by comparing test statistics to critical values or p-levels relative to this hypothesis. Therefore, a hypothesis of no significant difference or relationship is correctly called the null hypothesis.

Option A:
The null hypothesis is central to inferential statistics because rejecting it suggests that the data provide sufficient evidence for a real effect, while failure to reject it indicates that evidence is insufficient. This framing of “no effect” or “no difference” matches the description in the stem, making this option correct.

Option B:
The alternative hypothesis proposes that a real difference or relationship does exist and is accepted only if the null is rejected; it does not state “no difference.”

Option C:
A directional hypothesis specifies not only that a difference exists but also the direction of that difference, such as one mean being greater than another, which goes beyond the neutral position of the null.

Option D:
A causal hypothesis posits cause–effect relationships and may be directional; it does not represent the assumption of no relationship that underlies significance testing.

A sound argument is defined as a valid argument with all true premises. Because of validity, the conclusion logically follows from the premises. Because the premises are true, the conclusion must also be true in reality. Thus the description in the stem corresponds exactly to the notion of a sound argument.

Option A:
Option A, strong, usually refers to inductive arguments in which the premises make the conclusion highly probable. Strength does not guarantee truth with necessity and need not involve validity. Therefore strong is not the correct technical term here.

Option B:
Option B correctly names a sound argument as one that is valid with true premises. Such arguments provide the highest level of logical assurance about their conclusions. Hence sound is the most appropriate choice for the situation described.

Option C:
Option C, cogent, also describes a good inductive argument with strong support and true premises. However, cogency belongs to inductive, not strictly valid deductive, reasoning. Thus cogent does not match the definition given in the stem.

Option D:
Option D, invalid, refers to an argument whose conclusion does not follow necessarily from its premises. In an invalid argument, true premises may still lead to a false conclusion. Therefore invalid is the opposite of what is described and cannot be correct.