UGC NET Questions (Paper – 1)

Decoding is the receiver's process of interpreting and making sense of the symbols sent by the source. In the stem,students listen to the explanation and relate it to what they already know. This is a clear example of decoding. Accurate decoding is essential for successful learning.

Option A:
Encoding is done by the teacher when preparing and delivering the explanation,not by students listening.

Option B:
Decoding is the learner’s meaning-making process—interpreting the teacher’s words and linking them to prior knowledge—so it fits the stem.

Option C:
Feedback would involve students responding with questions or answers after decoding,which is a later stage.

Option D:
Channel selection deals with choosing the medium of transmission,not interpreting meaning.

Venn diagrams use overlapping circles to depict the relationships between classes such as inclusion, exclusion and intersection. In testing syllogisms, they visually show whether the logical requirements of the premises allow the conclusion. This graphical method provides an intuitive way to evaluate validity. Hence the diagrams mentioned in the stem are called Venn diagrams.

Option A:
Option A, flow charts, represent sequences of steps or decisions in procedures rather than set relationships in logic. They are used more in computer science and process modelling than in categorical reasoning. Thus flow charts are not the correct answer.

Option B:
Option B is correct because Venn diagrams are specifically designed to portray the logical structure of categorical propositions. By shading or marking regions, we can see how premises constrain possible cases and assess whether the conclusion follows. This matches the description provided.

Option C:
Option C, decision trees, represent branching choices and consequences and are often used in decision analysis, not in standard testing of syllogistic relations between classes. Therefore decision trees do not fit the stem.

Option D:
Option D, network graphs, depict nodes and connections for relationships like communication or social ties. They are not the conventional tool for illustrating class inclusion in traditional logic. Hence network graphs are not appropriate here.

Let the original price be 100 units. A 10% decrease takes it to 90. A further 10% decrease is now applied to 90, resulting in a reduction of 9, so the new price is 81. The overall decrease from 100 to 81 is 19 units, which is a 19% reduction. This shows that successive equal percentage decreases do not simply add arithmetically.

Option A:
Option A, 19%, correctly reflects the multiplicative effect of two successive 10% decreases. It uses the idea that the combined factor is 0.9 × 0.9 = 0.81, corresponding to a 19% drop.

Option B:
Option B, 20%, comes from the mistaken belief that decreases add directly (10% + 10%), but this ignores that the second decrease is on an already reduced base.

Option C:
Option C, 21%, overestimates the net effect and does not correspond to the computed final value of 81.

Option D:
Option D, 25%, greatly overstates the combined impact and has no support in the actual price sequence produced by the successive reductions.

Stratification refers to the layering of institutions into hierarchies of status and resources. Global rankings often elevate a small group of universities to “world-class” status, attracting more funding and talent to them. The stem describes this concentration effect, which is precisely the concern about stratification. Therefore, Option B is correct.

Option A:
Egalitarianism stands for equality and a reduction of hierarchies, which is the opposite of what critics fear rankings may cause. Thus, this option does not match the argument in the stem.

Option B:
Stratification captures the creation or deepening of unequal tiers among institutions. Rankings can legitimise and intensify these tiers, making this concept the best fit for the question.

Option C:
Randomness would imply that prestige and resources are distributed without pattern, which contradicts the systematic ordering created by rankings. Hence, this option is incorrect.

Option D:
Uniformity suggests that institutions become similar, whereas the critique focuses on widening gaps between a privileged few and the rest. Therefore, this option cannot complete the statement properly.

Statements A, B, D and F accurately describe inclusive teaching. A is true because inclusion begins with recognition of learner diversity. B is true as differentiated instruction tailors tasks and supports to varied needs. D is true since working with specialists and parents strengthens inclusive efforts, and F is true because removal of physical, curricular and attitudinal barriers is necessary. C is false since insisting on one method for all contradicts inclusion, and E is false because inclusive classrooms maintain high but realistic expectations for all; thus A, B, D and F only is the correct combination.

Option A:
Option A groups A, B and D but omits F, overlooking the importance of addressing different kinds of barriers. As F is also true, A, B and D only is incomplete.

Option B:
Option B brings together A, B, D and F, combining recognition of diversity, differentiation, collaborative support and barrier removal. It rightly excludes C and E, which enforce sameness or low expectations, so A, B, D and F only is correct.

Option C:
Option C includes C, which denies differentiated methods, making A, C, D and F only inconsistent with inclusive principles.

Option D:
Option D contains E, which lowers expectations for learners with disabilities; this conflicts with the equity orientation of inclusion and invalidates B, D, E and F only.

Statements A and B are correct descriptions of bar graphs and pie charts, and D is true because meaningful comparison of graphical data demands careful reading of scales, units and legends. Statement E is also correct since many exam questions allow or even require approximations for quick decision-making. Statement C is false because ignoring scales can lead to serious misinterpretation of data. Thus, the combination that includes A, B, D and E while excluding C is correct.

Option A:
Option A is incomplete because although it lists three true statements, it omits E and does not highlight the practical exam strategy of using approximations where appropriate. This reduces the applied insight necessary for UGC NET aptitude.

Option B:
Option B is insufficient since it leaves out A, failing to acknowledge the fundamental principle that bar lengths are proportional to values, which is basic to understanding bar graphs. Without A, the description of graphical interpretation is partial.

Option C:
Option C is incorrect because it includes C, the statement that minimises the importance of scales, and therefore accepts a guideline that would lead to faulty interpretation. Even though A, B and D are true, adding C makes the combination unsound.

Option D:
Option D is correct because it keeps the four accurate statements and rejects C, which directly contradicts best practice in reading graphs. It aligns with the skills expected in data interpretation sections of UGC NET.

Physical water scarcity occurs where natural hydrological conditions cannot meet the demands placed on them, even with efficient use. It reflects absolute limits in supply relative to population and economic activities. Economic water scarcity arises where water resources exist but infrastructure, finance and governance are inadequate for people to obtain safe and reliable supplies. This distinction between natural limits and access constraints is correctly expressed in Option B.

Option A:
Option A is incorrect because it reverses the definitions. Poor management can aggravate both types of scarcity, but abundant resources with poor management fit better under economic and governance issues than pure physical scarcity.

Option B:
Option B is correct since it clearly separates situations of low natural availability from those where institutions and investments are lacking. Understanding this difference is important for designing appropriate water policies.

Option C:
Option C is incorrect as it confuses water quality problems with scarcity types. Pollution can contribute to scarcity but does not define the physical versus economic distinction.

Option D:
Option D is incorrect because water scarcity can affect both urban and rural areas, and the physical versus economic classification is not based solely on settlement type.

This option is correct because the expansion of (a + b)² gives a² + 2ab + b². We obtain this by multiplying (a + b)(a + b) and collecting like terms. The cross terms ab and ba combine to give 2ab. Therefore, the complete identity is (a + b)² = a² + 2ab + b².

Option A:
The expression a² + b² omits the middle term 2ab that arises from the cross products in the expansion. It would represent (a − b)² only if combined with a negative cross term, but as written it is incomplete. Hence, it is not the correct identity here.

Option B:
The expression a² − 2ab + b² is the expansion of (a − b)², not (a + b)². The negative sign on 2ab indicates subtraction rather than addition. Therefore, this identity does not match the given binomial square.

Option C:
The expression a² + 2ab + b² correctly represents the square of a sum. It includes the squares of both terms and twice their product. This matches the standard algebraic identity for (a + b)², so this option is correct.

Option D:
The expression 2a² + b² does not arise from any simple binomial square formula. It has an incorrect coefficient on a² and is missing the cross term. Thus, it cannot represent (a + b)².

Statements A, B and D are correct, whereas C is incorrect. A is true because vague comments such as “good” or “bad” are less useful than specific remarks that indicate what worked and what needs improvement. B is true since focusing on behaviour and performance avoids attacking the learner’s personality and supports growth. D is true because feedback that the receiver cannot understand will not help learning. C is false because effective feedback is not defined by long delay; in many cases, timely or even immediate feedback is more beneficial.

Option A:
Option A is incorrect because it includes only A and B and omits D, which is also a correct characteristic of effective feedback. Without D, the set of statements does not fully capture what makes feedback useful for the receiver. Therefore A and B only is incomplete.

Option B:
Option B is correct because it groups A, B and D, combining specificity, focus on behaviour and clarity for the receiver. It correctly leaves out C, which wrongly insists on delayed feedback as a requirement. As it contains all and only the correct statements, this option is the right answer.

Option C:
Option C is incorrect because it selects B and D only and leaves out A. While B and D are valid, excluding A ignores the crucial role of specificity. Thus this option does not present the complete profile of effective feedback.

Option D:
Option D is incorrect because it treats all four statements as correct, including C. Since C misrepresents feedback timing by making delay compulsory, this option mixes a false statement with true ones and cannot be accepted.

Statements A, B, C, E and F all describe typical and useful aspects of spreadsheet use in education, while D is incorrect. Spreadsheets do organise data in tabular form, can calculate and recalculate values and can generate charts. Clear labels improve interpretation, and careless copying of formulas is a common source of mistakes. It is false to claim that spreadsheets can never exchange data with other tools, so D must be excluded, leaving A, B, C, E and F as the correct set.

Option A:
Option A is correct because it includes every true statement and excludes the single false one. It recognises both the strengths of spreadsheets and a common pitfall related to formula handling. This combination therefore matches the complete set of correct statements.

Option B:
Option B is incorrect because it omits E and F, ignoring readability and error risks. While A, B and C are accurate, they do not cover all aspects of good spreadsheet practice mentioned in the question. Hence this option is incomplete.

Option C:
Option C is incorrect because it leaves out A, which refers to the basic tabular structure that underpins spreadsheet work. Even though B, C, E and F are true, excluding A means the fundamental organisational role of spreadsheets is not acknowledged.

Option D:
Option D is incorrect because it omits B, thereby failing to recognise the importance of automatic recalculation using formulas. Without B, the computational power of spreadsheets is underrepresented, making the combination incomplete.

Statements A, B, C and D correctly describe the relations of contrariety and subcontrariety in the traditional square, and F is true about exam usage. E is false because modern logic’s treatment of universal propositions without assumed existential import undermines some of the classical relationships. Thus the correct set of true statements is A, B, C, D and F only.

Option A:
Option A is correct since it includes all the accurate relational claims plus the observation that UGC NET may still use the traditional framework. It excludes E, which overstates the continuity between traditional and modern logic. This makes the option consistent with both history and syllabus.

Option B:
Option B is incomplete, as it omits F and therefore does not mention the exam context. While A, B, C and D are true, the option fails to cover all the correct statements listed.

Option C:
Option C is wrong because it includes E, which incorrectly claims that all traditional relations survive in modern treatment unchanged. This conflicts with standard modern logic texts, so the combination cannot be accepted.

Option D:
Option D is incorrect since it leaves out B, omitting the key general statement about contraries, and thus does not contain all true statements. Consequently, it does not represent the full correct set.

Statements A, B, C and E are correct as they describe how economic instruments change incentives and behaviour. Pollution taxes and tradable permits put a price on emissions, harmful subsidies can lead to overuse of resources and well-designed user charges can support efficiency and equity. D is wrong because economic instruments usually complement rather than completely replace regulation, and F is wrong since policy mixes often combine price, information and voluntary tools. Therefore, A, B, C and E only is the correct set.

Option A:
Option A is incorrect because it omits E, overlooking the important role of user charges in managing water and waste services. While A, B and C are correct, without E the answer misses a major application area of economic instruments.

Option B:
Option B is correct since it captures the main forms and uses of economic instruments while excluding simplistic or extreme claims in D and F. It reflects the integrated, mixed-instrument approach recommended in environmental economics.

Option C:
Option C is incorrect as it includes F, which wrongly suggests economic tools cannot be combined with other approaches, and omits A, which describes a central instrument (pollution taxes). This combination is therefore incomplete and partially false.

Option D:
Option D is incorrect because it retains F and leaves out B. Ignoring emissions trading while accepting that economic instruments never mix with information campaigns contradicts real-world policy practice.

Statement B is true because adding an odd and an even number always yields an odd result. C is correct since the product of two odd numbers is odd. D is also correct because an odd times an even number always has a factor 2 and so is even. A is false because the sum of two odd integers is even, and E is false because not every even number is divisible by 3. Hence B, C and D only are correct.

Option A:
Option A is incomplete as it leaves out D and therefore does not include the important rule about the product of an odd and even number, which is regularly tested in parity questions.

Option B:
Option B is correct because it gathers all three standard parity rules, covering sums and products of odd and even numbers, while excluding A and E, which misstate these relationships.

Option C:
Option C is incorrect since it includes A, which wrongly claims that two odd numbers add to an odd result, contradicting parity arithmetic.

Option D:
Option D is wrong as it brings in E, which incorrectly generalises divisibility by 3 to all even numbers, and so mixes a false divisibility statement with otherwise correct parity rules.

A, B, C and E are correct; D is false. “p ∧ (q ∨ r)” distributes to “(p ∧ q) ∨ (p ∧ r)”, not just “(p ∧ q)”. Standard equivalences (A–C) and their use (E) are correct.

Option A:
Option A is incorrect because A is correct; grouping it with D as wrong is incorrect.

Option B:
Option B is correct because D is the only wrong statement.

Option C:
Option C is incorrect because C is correct; adding it to the wrong set is incorrect.

Option D:
Option D is incorrect because B and E are correct; treating them as wrong is incorrect.

Statements A, B and C are correct and reflect the core ideas of climate justice and equity in global negotiations. A notes differentiated responsibility, B points to the historical role of developed countries and C refers to the principle embodying equity concerns. Statement D is incorrect because climate justice highlights that vulnerable communities and poorer countries often bear disproportionate impacts. Therefore, the combination with A, B and C only is the correct answer.

Option A:
Option A is incomplete because it includes only A and B and leaves out C. While A and B are true, C is also correct and central to the equity principle in climate agreements. By omitting C, the option fails to capture the full conceptual picture.

Option B:
Option B is incorrect as it selects A, B and D and erroneously accepts D as correct. D contradicts the basic claim of climate justice that vulnerability and inequality shape climate impacts, so including it invalidates the combination.

Option C:
Option C is correct since it combines all the true statements and excludes the false one. It accurately captures responsibility, historical emissions and the normative principle used in agreements. As such, it fully matches the unit’s emphasis on climate justice.

Option D:
Option D is incorrect because it brings together B, C and D and leaves out A. Besides omitting A, which is correct, it accepts D, which denies the link between socio-economic vulnerability and climate impacts. This makes the combination inconsistent with climate justice discourse.