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General Knowledge QUESTION #4818

The concept explaining how individually rational self-interested behavior can lead to destructive collective outcomes is known as?

Tragedy of the Commons✔️
Population implosion
Carrying capacity
Prisoner's dilemma

Correct Answer Logic:

The Tragedy of the Commons, a concept developed by Garrett Hardin in 1968, explains how individuals acting in their own self-interest can deplete shared resources, leading to collective harm despite individual rationality.

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General Knowledge QUESTION #4649

Question 62

Team sports like cricket display socialist tendencies in requirements of individual subordination. Which conclusion may NOT be inferred?

All team sports have socialist tendencies✔️
All team sports are authoritarian
Without employee subordination to managerial authority, production for profit would not be possible
All team players are subordinate to their coaches

Correct Answer Logic:

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Physics and Math QUESTION #759

Question 63

Which of the following does not have closure property?

[0, 1]
[1, -1]✔️
[0, 0]
None

Correct Answer Logic:

The set [1, -1] does not have closure property under addition because 1 + 1 = 2, which is not in the set.

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Logical Reasoning QUESTION #3955

Question 64

Despite their microscopic size, there are very few biological materials that these _____ cannot _____.

undermine✔️
disseminate
aerate
exterminate

Correct Answer Logic:

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Chemistry QUESTION #1010

Question 65

Identify the homoleptic complex(es) that is/are low spin. (A) $[\text{Fe(CN)}_5\text{NO}]^{2-}$ (B) $[\text{CoF}_6]^{3-}$ (C) $[\text{Fe(CN)}_6]^{4-}$ (D) $[\text{Co(NH}_3)_6]^{3+}$ (E) $[\text{Cr(H}_2\text{O)}_6]^{2+}$

(C) only
(C) and (D) only✔️
(A) and (C) only
(B) and (E) only

Correct Answer Logic:

Homoleptic = only one type of ligand. (A) has $\text{CN}^-$ and NO — not homoleptic. (B) $[\text{CoF}_6]^{3-}$: F is weak field → high spin. (C) $[\text{Fe(CN)}_6]^{4-}$: $\text{CN}^-$ is strong field → low spin, homoleptic. (D) $[\text{Co(NH}_3)_6]^{3+}$: $\text{NH}_3$ is moderate-strong field on $\text{Co}^{3+}$ → low spin, homoleptic. So (C) and (D) are both homoleptic and low spin.

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Boilers Mechanical Engineering QUESTION #2426

Question 66

The critical insulation radius for a cylindrical surface with insulation of conductivity $k_{ins}$ and outer convection coefficient $h$ is:

$r_{cr} = k_{ins} \cdot h$
$r_{cr} = h / k_{ins}$
$r_{cr} = k_{ins} / h$✔️
$r_{cr} = \sqrt{k_{ins}/h}$

Correct Answer Logic:

Critical insulation radius: $r_{cr}=k_{ins}/h$. Adding insulation initially INCREASES heat loss if the pipe radius \(r_1

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Civil Engineering QUESTION #6652

Question 67

Shrinkage and Temperature reinforcement in a slab must be:

Placed only at the supports
Distributed throughout the slab in both directions
Placed perpendicular to the main flexural steel✔️
Higher in grade than the main steel

Correct Answer Logic:

In one-way slabs, reinforcement is provided in the direction perpendicular to the main flexural reinforcement to resist stresses from temperature changes and concrete shrinkage.

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Urdu QUESTION #2951

Question 68

نسلی اعتبار سے لفظ اردو کس زبان کا لفظ ہے؟

سنسکرت
برج بھاشا
ترکیہ
ترکی✔️

Correct Answer Logic:

No explanation provided for this question.

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Math Physics Chemistry Biology QUESTION #791

Question 69

Diamond is non-conductor due to:

Free electrons present
Giant structure
Absence of free electrons✔️
None

Correct Answer Logic:

In diamond, each carbon is covalently bonded to four others in a tetrahedral arrangement. There are no free electrons available to conduct electricity.

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Economics QUESTION #1696

Question 70

An expansionary monetary policy that increases the money supply is most likely to have a direct positive effect on which of the following macroeconomic variables?

Long-run real economic growth
The rate of unemployment
The labour force participation rate
The rate of inflation✔️

Correct Answer Logic:

In the short run, an increase in the money supply ($\uparrow M_s$) can stimulate aggregate demand and temporarily reduce unemployment. However, according to the Quantity Theory of Money ($MV = PQ$), in the long run an increase in money supply primarily leads to higher inflation (price level increases). The classical dichotomy holds that money is neutral in the long run, so real economic growth is determined by supply-side factors, not money supply.

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Education QUESTION #6783

Question 71

The National Education Assessment System (NEAS) was established in Pakistan primarily with funding from the World Bank and DfID in 2003. What was its PRIMARY assessment purpose — and how does this differ from the purpose of the Board of Intermediate and Secondary Education (BISE)?

NEAS certifies individual student performance for promotion; BISE monitors national education standards
NEAS conducts large-scale national assessments to inform policy, monitor curriculum implementation standards, and identify achievement correlates at the system level; BISE conducts high-stakes individual certification examinations (SSC, HSSC) at grades 10 and 12✔️
NEAS administers competitive entrance examinations for public sector jobs; BISE focuses on diagnostic assessment
Both serve identical purposes but operate at different administrative levels

Correct Answer Logic:

NEAS is a system-level monitoring body. It conducts large-scale assessments to give federal policymakers a picture of education quality, monitor curriculum translation into learning, and identify factors affecting achievement. It does not certify individual students. BISE, in contrast, conducts individual-certification high-stakes examinations (SSC at grade 10, HSSC at grade 12) that directly determine students' academic credentials.

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Urdu QUESTION #5275

Question 72

'اردو شاعری پر ایک نظر' کے مصنف ہیں؟

کلیم الدین احمد✔️
ڈاکٹر عبادت بریلوی
مسعود حسن رضوی ادیب
ڈاکٹر رؤف پاریکھ

Correct Answer Logic:

اردو شاعری پر ایک نظر کلیم الدین احمد کی مشہور تنقیدی تصنیف ہے۔

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Chemistry QUESTION #7361

Question 73

The maximum number of electrons that can occupy a subshell defined by $\ell = 3$ and $n = 4$ is:

10
12
14✔️
16

Correct Answer Logic:

For $\ell = 3$ (f-subshell):
Number of orbitals = $2\ell + 1 = 2(3) + 1 = 7$
Max electrons = $7 \times 2 = 14$

This is the 4f subshell. Note that $n = 4$ is valid since $\ell$ can be 0, 1, 2, or 3 for $n = 4$. The 4f subshell holds exactly 14 electrons, which accounts for the 14 lanthanoids.

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Statistics QUESTION #1978

Question 74

Given $n_1 = 2$ samples with replacement from population $\{4, 6, 8\}$ and $n_2 = 2$ from $\{1, 2, 3\}$, the variance of the sampling distribution of $\bar{X}_1 - \bar{X}_2$ equals:

$\dfrac{\sigma_1^2}{n_1} - \dfrac{\sigma_2^2}{n_2}$
$\dfrac{\sigma_1^2}{n_1} + \dfrac{\sigma_2^2}{n_2}$✔️
$\sigma_1^2 + \sigma_2^2$
$\dfrac{\sigma_1^2 + \sigma_2^2}{n_1 + n_2}$

Correct Answer Logic:

For independent samples, $\sigma^2_{\bar{X}_1 - \bar{X}_2} = \dfrac{\sigma_1^2}{n_1} + \dfrac{\sigma_2^2}{n_2}$. For population $\{4,6,8\}$: $\mu_1=6$, $\sigma_1^2 = \frac{8}{3}$. For $\{1,2,3\}$: $\mu_2=2$, $\sigma_2^2=\frac{2}{3}$. So variance $= \frac{8/3}{2}+\frac{2/3}{2} = \frac{4}{3}+\frac{1}{3}=\frac{5}{3}$.

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Therapeutics and Patient Care QUESTION #3869

Question 75

Which penicillin retains its antibacterial activity in the presence of the beta-lactamase enzyme penicillinase?

Amoxicillin
Flucloxacillin✔️
Phenoxymethylpenicillin
Ticarcillin

Correct Answer Logic:

Flucloxacillin is a penicillinase-resistant penicillin due to its bulky side chain that prevents the beta-lactamase enzyme from accessing the beta-lactam ring.

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ETAG General Aptitude QUESTION #3764

Question 76

Benevolence : P :: Revenge : Q. Select the pair for P and Q that matches the analogy.

P = Frugal; Q = Spiteful
P = Selfless; Q = Friendly
P = Bitter; Q = Mean
P = Altruistic; Q = Vindictive✔️

Correct Answer Logic:

Altruism is a synonym for benevolence, and vindictiveness is a synonym for revenge.

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Mathematics QUESTION #1299

Question 77

The solution of $\sqrt{1-y^2}\,dx-\sqrt{1-x^2}\,dy=0$ with $y(0)=\dfrac{\sqrt{3}}{2}$ is:

$\arcsin x - \arcsin y = \dfrac{\pi}{3}$
$\arcsin x = \arcsin y - \dfrac{\pi}{3}$✔️
$x + y = \sqrt{3}$
$\arcsin x + \arcsin y = \pi$

Correct Answer Logic:

Integrating: $\arcsin x = \arcsin y + C$. At $x=0$, $y=\dfrac{\sqrt{3}}{2}$: $0=\arcsin\dfrac{\sqrt{3}}{2}+C=\dfrac{\pi}{3}+C\Rightarrow C=-\dfrac{\pi}{3}$. So $\arcsin x=\arcsin y-\dfrac{\pi}{3}$.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3254

Question 78

'Total Peripheral Resistance' ($TPR$) increases when:

Blood vessels dilate
Blood viscosity increases✔️
Blood pressure drops
Exercise starts

Correct Answer Logic:

Thicker blood (higher viscosity) or constricted vessels increase resistance.

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Education QUESTION #6873

Question 79

A Subject Specialist in Education is designing a classroom seating plan. Which of the following accurately describes how seating configuration should be determined, according to sound classroom management principles?

Seating should always be in rows to maximize teacher visibility and control
Seating should be determined by the lesson plan and the instructional objectives of each lesson✔️
Students should choose their own seats to promote autonomy and reduce resistance
Seating should remain fixed year-round to establish predictability and routine

Correct Answer Logic:

Seating arrangement is not a static administrative decision — it should be directly aligned with instructional purpose. Group seating supports cooperative learning; rows support independent work; U-shaped or circular arrangements facilitate whole-group discussion. Effective teachers modify seating to match the nature of each learning activity.

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Egnlish QUESTION #686

Question 80

What is the central theme of "Tintern Abbey"?

The industrial revolution
The restorative power of nature✔️
Urbanization
None of these

Correct Answer Logic:

Wordsworth explores how the memory of nature's beauty provides "sweet sensations" and moral guidance to the "weary mind."

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