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English QUESTION #7630

loaf
loafs
loaves✔️
None of these

Correct Answer Logic:

The plural of 'loaf' is 'loaves'. This follows the irregular plural rule where words ending in 'f' or 'fe' change to 'ves' in plural form (e.g., leaf-leaves, knife-knives, life-lives).

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Disaster Management QUESTION #6528

Question 8362

What is the fundamental flaw in disaster recovery that only focuses on 'building back'?

It takes too long
It fails to address underlying vulnerabilities and may recreate pre-disaster risks✔️
It costs more than resilient reconstruction
It requires international assistance

Correct Answer Logic:

Section 10 emphasizes the 'Build Back Better' principle, which integrates risk reduction into reconstruction. Simply rebuilding to previous standards recreates vulnerabilities, whereas resilient reconstruction addresses root causes, incorporates hazard-resistant designs, and reduces future risks.

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Mathematics QUESTION #11180

Question 8363

Which of the following is connected in $\mathbb{R}$ with usual topology?

$\mathbb{N}$
$\mathbb{Q}$
$(0,1]$✔️
$\mathbb{Z}$

Correct Answer Logic:

In $\mathbb{R}$ with usual topology, a subset is connected if and only if it is an interval. $(0,1]$ is an interval (a connected set). $\mathbb{N}$, $\mathbb{Z}$, and $\mathbb{Q}$ are all disconnected (totally disconnected) in $\mathbb{R}$ — they contain no intervals and every point is isolated from the rest in the subspace sense.

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Biology QUESTION #7247

Question 8364

In prokaryotes, chromatophores are:

Specialized granules responsible for colouration of cells
Structures responsible for organizing the shape of cells
Inclusion bodies lying free inside the cells for carrying out various metabolic activities
Internal membrane systems that become extensive and complex in photosynthetic bacteria✔️

Correct Answer Logic:

In prokaryotes, chromatophores are internal membrane systems (invaginations of plasma membrane) that become extensive and complex in photosynthetic bacteria such as purple bacteria and green sulfur bacteria. They bear photosynthetic pigments and are functionally analogous to chloroplasts.

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Math Physics Chemistry Biology QUESTION #543

Question 8365

Which of the following has 40 chromosomes?

Corn
Sugarcane
Frog
Mouse✔️

Correct Answer Logic:

Mouse has 40 chromosomes

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The Constitution of Pakistan QUESTION #9350

Question 8366

Under Article 175B, the Federal Constitutional Court must maintain what composition regarding judges from provinces?

Majority from the largest province
Equal number from each province with at least one from Islamabad High Court✔️
Proportional representation based on population
At least two from each province

Correct Answer Logic:

Article 175B(1) proviso requires that the Federal Constitutional Court 'shall have equal number of Judges from each Province and at least one Judge from Islamabad High Court.' The explanation adds that the number of judges from the Islamabad High Court cannot exceed the number from any province.

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Chemistry QUESTION #1450

Question 8367

What is the main product when nitrobenzene reacts with chlorine in the presence of $\text{AlCl}_3$?

Ortho-chloronitrobenzene
Meta-chloronitrobenzene✔️
Chlorobenzene
None of these

Correct Answer Logic:

The nitro group ($-\text{NO}_2$) is a strong electron-withdrawing, meta-directing group in electrophilic aromatic substitution (EAS). It deactivates the ring and directs incoming electrophiles to the meta position. Therefore, when nitrobenzene undergoes chlorination with $\text{Cl}_2/\text{AlCl}_3$, the major product is meta-chloronitrobenzene (1-chloro-3-nitrobenzene).

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Islamic Studies QUESTION #359

Question 8368

The first Caliph of the Abbasid Caliphate was:

Saffah✔️
Haroon UR Rasheed
Mansoor
Mamoon

Correct Answer Logic:

Abu al-Abbas al-Saffah was the founder and first caliph of the Abbasid dynasty.

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Boilers Mechanical Engineering QUESTION #4004

Question 8369

When performing a Hydraulic Test, why is 'Air' removed from the boiler completely?

Air is too expensive
Compressed air stores massive energy and can cause an explosion if the boiler fails✔️
Air makes the water turn green
Air helps the boiler to float

Correct Answer Logic:

Water is incompressible; if the vessel ruptures during a hydrotest, there is no 'blast' like there would be with air/steam.

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Chemistry QUESTION #1421

Question 8370

Silicones are primarily:

Organic polymers
Inorganic polymers
Hybrid organic-inorganic polymers✔️
None of these

Correct Answer Logic:

Silicones (polysiloxanes) are hybrid organic-inorganic polymers. Their backbone is inorganic — consisting of alternating silicon and oxygen atoms ($\text{Si-O-Si}$ chains) — while organic groups (typically methyl or phenyl) are attached to silicon. This dual nature gives silicones unique properties: thermal stability, water repellence, and flexibility.

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Education QUESTION #6877

Question 8371

The 'hidden curriculum' in a school most accurately refers to which of the following?

The portion of the official curriculum that teachers choose not to teach
The unwritten, implicit messages and behavioral expectations students learn through the school culture and adult behavior✔️
The supplementary curriculum provided to gifted students beyond standard instruction
The informal notes and resources teachers use that are not part of official lesson plans

Correct Answer Logic:

The hidden curriculum refers to the implicit learning that occurs through the values, norms, rituals, and behavioral patterns modeled by teachers, administrators, and the school community — not through formally written content. It communicates what is valued, what behavior is appropriate, and who is respected, shaping student conduct in powerful ways.

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Math Physics Chemistry Biology QUESTION #4241

Question 8372

Arachidonic acid, which is the precursor molecule for prostaglandins is:

A saturated fatty acid with 18 carbons
An unsaturated fatty acid with 18 carbons
A tri-unsaturated fatty acid with 20 carbons
A tetra-unsaturated fatty acid with 20 carbons✔️

Correct Answer Logic:

Arachidonic acid: 20 carbons, 4 double bonds.

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MCQs Section QUESTION #5238

Question 8373

جس سے کسی چیز کو تشبیہ دی جائے اسے کہتے ہیں؟

مشبہ
مشبہ بہ✔️
وجہِ شبہ
حرفِ تشبیہ

Correct Answer Logic:

مشبہ بہ وہ ہے جس سے تشبیہ دی جائے۔ مشبہ وہ ہے جسے تشبیہ دی جائے۔

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Physics QUESTION #1043

Question 8374

Which options represent correct variation of photoelectric current vs. property on x-axis?

A and D✔️
B and D
A only
A and C

Correct Answer Logic:

Photoelectric current vs. intensity: linear (proportional) — Graph A is correct (linear through origin). Photoelectric current vs. frequency: zero below threshold, then increases above — Graph D shows this (starts from threshold). B (flat vs intensity) and C (linear from zero vs frequency) are incorrect. Correct: A and D.

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Molecular Biology / Bioinformatics / Biochemistry QUESTION #11063

Question 8375

Terrestrial biodiversity is generally found to be greatest near the:

North pole
South pole
Equator✔️
Tropic of Cancer

Correct Answer Logic:

Terrestrial biodiversity peaks near the equator — a pattern known as the latitudinal diversity gradient. Tropical rainforests near the equator harbour over 50% of all terrestrial species despite covering only ~6% of Earth's land area. Multiple hypotheses explain this: higher solar energy input, stable warm temperatures year-round, higher precipitation, longer evolutionary history, and faster speciation rates. Biodiversity decreases progressively toward the poles.

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English QUESTION #818

Question 8376

Spot the error: 'This apartment (A)be (B)perfect, if it (C)were a (D)little larger.'

be✔️
perfect
were
little larger

Correct Answer Logic:

The error is at (A). 'be' should be 'would be' because this is a conditional sentence (Type 2). Correct: 'This apartment would be perfect, if it were a little larger.'

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Chemistry QUESTION #1428

Question 8377

Fugacity is used to measure:

Real gas behavior✔️
Ideal gas compressibility
Equilibrium constant
None of these

Correct Answer Logic:

Fugacity is a thermodynamic property introduced by G.N. Lewis to describe the effective pressure of a real gas — it accounts for non-ideal behaviour. For an ideal gas, fugacity equals pressure, but for real gases it deviates due to intermolecular interactions. It is used in place of pressure in thermodynamic equations (like chemical potential) when dealing with real gases.

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Education QUESTION #7601

Question 8378

What instructional approach challenges students to seek solutions to real-world problems either by themselves or in groups?

Problem based learning✔️
Lab oriented method
Interactive approach
None of these

Correct Answer Logic:

Problem-based learning (PBL) presents students with authentic, ill-structured problems and requires them to identify, research, and develop solutions collaboratively or independently.

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Physics and Math QUESTION #759

Question 8379

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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The Elections Act 2017 QUESTION #9419

Question 8380

Under Section 26(2), a person is entitled to enroll as a voter if they possess a National Identity Card issued by NADRA. The NIC must be possessed at any time till the:

Thirtieth day before polling day
Last day fixed for inviting claims, objections and applications for preparation, revision or correction of electoral rolls✔️
Day of announcement of the Election Programme
Date of publication of the preliminary electoral rolls

Correct Answer Logic:

Section 26(2)(c) requires possession of a NIC 'at any time till the last day fixed for inviting claims, objections and applications for preparation, revision or correction of electoral rolls'.

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