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Basic strength: aliphatic $>$ aromatic amines. Among aliphatic: secondary $>$ primary due to +I effect. N-ethylethanamine (diethylamine) $>$ ethanamine (ethylamine). Aromatic amines much weaker: N-methylaniline $>$ aniline (benzenamine) due to partial +I from methyl. Order: N-ethylethanamine $>$ ethanamine $>$ N-methylaniline $>$ benzenamine.

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Administration QUESTION #9556

Question 424

The National Economic Council (NEC) and National Finance Commission (NFC) are both constitutional bodies. What is the fundamental difference in their scope and functions?

NEC decides how federal taxes are distributed between federation and provinces; NFC formulates long-term economic plans for national development
NEC reviews overall economic conditions and formulates financial, commercial and social policy frameworks; NFC decides criteria for distributing tax revenues between federal and provincial governments✔️
NEC supervises the Planning Commission and approves development projects above Rs. 40 million; NFC ensures audit compliance across all government tiers
NEC is a permanent body chaired by the Prime Minister; NFC is a temporary body constituted every five years — both perform identical functions of resource allocation

Correct Answer Logic:

NEC (Article 156) is the apex economic policy body — it formulates the macro-framework for financial, commercial, social and economic policy, chaired by the PM. NFC (Article 160) is a constituted body (every 5 years) with the specific technical function of determining how taxes in the 'divisible pool' are distributed between federation and the four provinces. They operate at different levels: policy framework vs. fiscal distribution formula.

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General Knowledge QUESTION #4727

Question 425

The 2005 Nobel Peace Prize was awarded to Mohamed ElBaradei together with which organization?

UNESCO
International Atomic Energy Agency (IAEA)✔️
World Health Organization
UNICEF

Correct Answer Logic:

The 2005 Nobel Peace Prize was jointly awarded to Mohamed ElBaradei and the International Atomic Energy Agency (IAEA) for their efforts to prevent nuclear energy from being used for military purposes.

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MBBS QUESTION #10264

Question 426

Renal (metabolic) compensation for a primary respiratory acid-base disturbance (e.g., chronic hypercapnia in COPD) is characteristically much slower than respiratory compensation for a primary metabolic disturbance, typically requiring:

Only a few seconds
A few minutes
Several hours to a few days, as renal bicarbonate handling adjusts✔️
Compensation never occurs for respiratory disturbances

Correct Answer Logic:

Respiratory compensation (via chemoreceptor-driven changes in ventilation) occurs within minutes, whereas renal compensation requires altering bicarbonate reabsorption and net acid excretion, a slower process taking several hours to days to reach a new steady state — explaining why chronic (compensated) respiratory acidosis differs biochemically from acute (uncompensated) respiratory acidosis.

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Therapeutics and Patient Care QUESTION #3907

Question 427

In which clinical condition should the dose of vancomycin be reduced to prevent drug accumulation and toxicity?

Pulmonary failure
Hepatic impairment
Heart failure
Renal impairment✔️

Correct Answer Logic:

Vancomycin is primarily renally excreted. In renal impairment, clearance is reduced, leading to drug accumulation, nephrotoxicity, and ototoxicity. Dose and/or frequency must be reduced.

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Civil Procedure QUESTION #3729

Question 428

A man is walking down the street when a stranger points a gun at him and says, 'Go into that bank and steal $\text{\$1,000}$, or I will kill you right now.' The man does it. He is caught and charged with robbery. What is his best defense?

Entrapment.
Duress.✔️
Necessity.
Involuntary Intoxication.

Correct Answer Logic:

Duress is a defense to a crime (other than intentional homicide) if the defendant performed the act because they were threatened with imminent death or serious bodily injury.

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Accounting & Finance QUESTION #6069

Question 429

In a standard break-even chart, what does the vertical distance between the total revenue line and the total cost line represent at a level of activity beyond the break-even point?

The break-even revenue
The margin of safety in revenue
The profit at that level of activity✔️
The total contribution

Correct Answer Logic:

In a break-even chart, the gap between Total Revenue and Total Cost represents Profit (if revenue is higher) or Loss (if cost is higher).

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Pakistan Affairs QUESTION #138

Question 430

What is the approximate area covered by Pakistan's forests?

9%
7%
5%
4.80%✔️

Correct Answer Logic:

According to most international and government reports, Pakistan's forest cover is approximately 4.8% to 5%.

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Chemistry QUESTION #468

Question 431

Which of the following is pale yellow to reddish yellow in color?

Pb?O
PbO?
PbO✔️
2PbCO?.Pb(OH)?

Correct Answer Logic:

PbO (litharge) is pale yellow to reddish yellow

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Social Studies QUESTION #10007

Question 432

According to Judith Butler, gender should be understood as:

Essentialist
Social
Performative✔️
None of these

Correct Answer Logic:

Butler's theory of gender performativity holds that gender is constituted through repeated acts, not an inherent essence.

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Physics QUESTION #1190

Question 433

As per quantum physics, the observables 'E' and _________ cannot be simultaneously measured with hundred percent accuracy.

p_x
t✔️
x
None of these

Correct Answer Logic:

The energy-time uncertainty relation is $\Delta E \cdot \Delta t \geq \frac{\hbar}{2}$. Energy $E$ and time $t$ are complementary observables that cannot both be known precisely simultaneously. This is analogous to the position-momentum uncertainty: $\Delta x \cdot \Delta p_x \geq \frac{\hbar}{2}$. So 'E' is paired with 't' in the uncertainty principle.

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MBBS QUESTION #10188

Question 434

A patient develops unilateral elevation and paradoxical movement of the diaphragm on fluoroscopy after cardiothoracic surgery. Which nerve was most likely injured?

Vagus nerve
Phrenic nerve✔️
Intercostal nerve
Long thoracic nerve

Correct Answer Logic:

The phrenic nerve (C3-C5 root value) provides the sole motor supply to the diaphragm; its injury during cardiac or thoracic surgery (it runs anterior to the root of the lung and along the pericardium) causes ipsilateral diaphragmatic paralysis and paradoxical upward movement on inspiration.

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Chemistry QUESTION #7153

Question 435

Which of the following pairs consist entirely of compounds that act as Lewis acids?

$PH_{3}$ and $SiCl_{4}$
$BCl_{3}$ and $AlCl_{3}$✔️
$PH_{3}$ and $BCl_{3}$
$AlCl_{3}$ and $SiCl_{4}$

Correct Answer Logic:

A Lewis acid is an electron-pair acceptor.

$BCl_{3}$ and $AlCl_{3}$ are electron-deficient molecules as the central atoms (B and Al) have only 6 electrons in their valence shell.
$PH_{3}$ is a Lewis base due to the lone pair on phosphorus.
$SiCl_{4}$ can act as a Lewis acid by expanding its octet, but $BCl_{3}$ and $AlCl_{3}$ are the most classic examples of electron-deficient Lewis acids.

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Boilers Mechanical Engineering QUESTION #2417

Question 436

The thermal diffusivity $\alpha$ is defined as:

$\alpha = \rho c / k$
$\alpha = k / (\rho c)$✔️
$\alpha = k \cdot \rho \cdot c$
$\alpha = k / c$

Correct Answer Logic:

Thermal diffusivity $\alpha=k/(\rho c)$ (m²/s) characterizes how quickly a material responds to temperature changes. High $\alpha$ means faster thermal response.

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Library Sciences QUESTION #1522

Question 437

According to Bopp and Smith (2001), the reference interview is essential because:

It saves the librarian's time by limiting user queries
It helps the librarian accurately understand the user's actual information need, which may differ from the initial query✔️
It is required by library policy in all institutions
It replaces the need to consult printed reference sources

Correct Answer Logic:

Bopp and Smith (2001) emphasize that the reference interview is a critical professional skill because users often cannot articulate their true information need precisely. The interview helps the librarian clarify, negotiate, and properly understand the query before selecting appropriate sources.

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Ability / HR / Governance / Special Education QUESTION #5645

Question 438

A post in any office or department has remained vacant for three years or more continuously. What is the consequence under the delegated financial powers in Annex-I?

The post is automatically converted to a Development Expenditure post
The post shall be deemed to have been abolished and revival requires prior approval of the Financial Adviser✔️
The Secretary has full powers to revive the post without any prior approval
The post can be revived by the Head of Department within his delegated powers

Correct Answer Logic:

Per Annex-I remarks the post in any office or department which has remained vacant for a period of three years or more shall be deemed to have been abolished. The powers for revival of that post shall not be exercised without obtaining prior approval of the Financial Adviser.

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Reading and Writing (Module-1) QUESTION #10469

Question 439

The regime's ------- rule left little room for -------, as any hint of criticism was swiftly silenced.

lenient . . obedience
despotic . . dissent✔️
benevolent . . loyalty
democratic . . debate

Correct Answer Logic:

A rule allowing no criticism is 'despotic,' leaving no room for 'dissent.'

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Biology Zoology Botany QUESTION #1382

Question 440

Which of the following is NOT a characteristic of algae?

Autotrophic
Multicellular
Lack true roots, stems, and leaves
All algae are microscopic✔️

Correct Answer Logic:

Not all algae are microscopic — this is the FALSE statement. Giant kelp (Macrocystis pyrifera) can grow up to 60 metres long. Algae are autotrophic (mostly), lack true roots/stems/leaves (they have thallus), and can be unicellular or multicellular. The statement that 'all algae are microscopic' is incorrect.

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