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Accounting Finance and Punjab Sales Tax on Services QUESTION #2579

According to Entry No. 19 of the Offences and Penalties Schedule, where a person fails to declare or conceals any business bank account, or fails to intimate any change in business bank account within fourteen days, the range of penalty is:

Twenty-five thousand to fifty thousand rupees
Fifty thousand to two hundred thousand rupees
One hundred thousand to five hundred thousand rupees✔️
Five hundred thousand to one million rupees

Correct Answer Logic:

Entry No. 19 provides that where any person fails to declare, conceals any business bank account or gives misleading declaration or fails to intimate any change within fourteen days, such person shall be liable to a penalty ranging from ONE HUNDRED THOUSAND TO FIVE HUNDRED THOUSAND RUPEES.

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Basic Mathematics QUESTION #2873

Question 382

$40$ is $25\%$ of which number?

100
160✔️
200
120

Correct Answer Logic:

If $0.25x = 40$, then $x = 40 / 0.25 = 160$.

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Electrical Engineering QUESTION #2177

Question 383

A three-phase induction motor runs at $1440\,\text{rpm}$ on a $50\,\text{Hz}$ supply. The number of poles and percent slip are respectively:

4 poles, $4\%$✔️
6 poles, $4\%$
4 poles, $6\%$
8 poles, $4\%$

Correct Answer Logic:

Synchronous speed for $P = 4$: $N_s = \frac{120\times50}{4} = 1500\,\text{rpm}$. Slip $s = \frac{1500-1440}{1500}\times100 = 4\%$. For $P=6$: $N_s=1000\,\text{rpm}$, which would give negative slip — physically impossible.

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Chemistry QUESTION #1076

Question 384

Match List-I with List-II: (A) Haber process — (B) Wacker oxidation — (C) Wilkinson catalyst — (D) Ziegler catalyst; with (I) Fe catalyst (II) PdCl$_2$ (III) [(PPh$_3)_3$RhCl] (IV) TiCl$_4$ with Al(CH$_3)_3$

A-I, B-II, C-III, D-IV✔️
A-I, B-IV, C-III, D-II
A-I, B-II, C-IV, D-III
A-II, B-III, C-I, D-IV

Correct Answer Logic:

Haber process (NH$_3$ synthesis): Fe catalyst (I). Wacker oxidation (ethylene to acetaldehyde): PdCl$_2$ (II). Wilkinson catalyst (hydrogenation): [(PPh$_3)_3$RhCl] (III). Ziegler-Natta catalyst (polymerization): TiCl$_4$ + Al(CH$_3)_3$ (IV). Matching: A-I, B-II, C-III, D-IV.

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Accounting Finance and Punjab Sales Tax on Services QUESTION #2581

Question 385

Under section 14(2), who may be required to withhold full or part of tax charged on taxable services — a power that extends even to unregistered persons?

Only registered persons with annual turnover exceeding the threshold
Any person or class of persons WHETHER REGISTERED OR NOT, as notified by the Authority✔️
Only persons who are themselves service providers
Only banks and financial institutions

Correct Answer Logic:

Section 14(2) explicitly states that the Authority may require ANY PERSON OR CLASS OF PERSONS WHETHER REGISTERED OR NOT for the purpose of this Act to withhold full or part of the tax charged, and deposit it with the Government in the prescribed manner.

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Pakistan Affairs QUESTION #583

Question 386

Pakistan Resolution (March 1940) was presented by:

Allama Muhammad Iqbal
Sir Agha Khan
AK Fazlul Haq✔️
None of These

Correct Answer Logic:

The resolution was moved by A.K. Fazlul Huq, the then Chief Minister of Bengal.

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Library Sciences QUESTION #1541

Question 387

Which budgeting approach allocates funds based on measurable outputs and performance targets rather than inputs or previous spending levels?

Line-item budgeting
Incremental budgeting
Performance-based budgeting✔️
Formula budgeting

Correct Answer Logic:

Performance-based budgeting links resource allocation to measurable outcomes and service targets (e.g., number of reference queries answered, circulation statistics). It holds library managers accountable for results rather than merely tracking expenditure categories.

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Islamic Studies QUESTION #654

Question 388

The "Year of the Elephant" (Am al-Fil) is associated with the birth of:

Hazrat Abu Bakr
The Holy Prophet (ﷺ)✔️
Hazrat Ali
None of these

Correct Answer Logic:

It refers to the year 570 CE, when the Prophet (ﷺ) was born.

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Urdu QUESTION #1409

Question 389

دوزخی کس کی سوانحِ عمری ہے؟

عصمت چغتائی✔️
بانو قدسیہ
فاطمہ الطاف
زاہدہ حنا

Correct Answer Logic:

''دوزخی'' عصمت چغتائی کی لکھی ہوئی اپنے شوہر شاہد لطیف کی سوانحِ عمری ہے۔ عصمت چغتائی (1915–1991) اردو افسانہ نگاری کی جرأت مند آواز تھیں۔ انہوں نے خواتین کے مسائل اور معاشرتی ریاکاری کو بے باکی سے پیش کیا۔ ان کے مشہور افسانوں میں ''لحاف'' اور ''ٹیڑھی لکیر'' شامل ہیں۔

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Commerce QUESTION #1222

Question 390

When a tax on a good starts small and is gradually increased, tax revenue:

Will fall
Will rise
Will first rise and then fall✔️
Will first fall and then rise

Correct Answer Logic:

This is described by the Laffer Curve. At very low tax rates, revenue is low. As rates rise, revenue increases. But beyond an optimal rate, higher taxes reduce the tax base (less economic activity, more evasion) so revenue begins to fall. Therefore tax revenue first rises and then falls as the tax rate is gradually increased.

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Agronomy QUESTION #2111

Question 391

Integrated soil fertility management (ISFM) is distinguished from conventional fertilizer recommendations by:

Replacing all synthetic fertilizers with organic inputs only
Combining the use of improved germplasm, mineral fertilizers, and organic resources in a site-specific manner that leverages synergistic interactions — where organic matter improves the efficiency of mineral fertilizers and mineral fertilizers accelerate organic matter decomposition and nutrient release — targeting smallholder farming systems in sub-Saharan Africa and South Asia✔️
Using only locally available organic materials regardless of their nutrient content or crop nutrient demand
Applying mineral fertilizers at maximum agronomic doses to build soil fertility rapidly

Correct Answer Logic:

ISFM (Vanlauwe et al.) is based on four components: (1) use of improved varieties responsive to inputs, (2) appropriate mineral fertilizer application, (3) organic resource management, and (4) local adaptation. Key insight: organic inputs alone rarely meet crop demand, but combined with mineral fertilizers, organic matter improves fertilizer response through enhanced soil biological activity, water retention, and reduced P-fixation — achieving yield responses greater than either input alone.

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Math Physics Chemistry Biology QUESTION #810

Question 392

Which is not present abundantly in Earth's crust?

Na
Al
Ba✔️
Ca

Correct Answer Logic:

Barium (Ba) is a trace element in Earth's crust. Oxygen, silicon, aluminium, calcium, and sodium are among the most abundant elements.

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Physics QUESTION #4404

Question 393

A cannon is placed on a smooth surface. When it fires a shell, the cannon moves backward. This recoil occurs due to:

Law of conservation of energy
Backward thrust of the gases
Newton's third law of motion✔️
Newton's first law of motion

Correct Answer Logic:

When the cannon fires a shell forward, by Newton's third law, the shell exerts an equal and opposite reaction force on the cannon backward. This causes the cannon to recoil.

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Physics QUESTION #370

Question 394

The centre of Newton rings is dark due to:

Polarization
Destructive interference✔️
Constructive interference
Reflection

Correct Answer Logic:

The center is dark due to destructive interference with 180? phase change

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Basic Mathematics QUESTION #2826

Question 395

If $5(x - 3) = 2(x + 6)$, find $x$.

7
9
11✔️
13

Correct Answer Logic:

$5x - 15 = 2x + 12$. $5x - 2x = 12 + 15$. $3x = 27$. $x = 9$. Wait: $5(9-3)=5\times6=30$ and $2(9+6)=2\times15=30$ ✓. So $x=9$, which is option index 1 (option_2).

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City and Regional Planning QUESTION #5005

Question 396

What is the theoretical basis for Transit-Oriented Development (TOD) density gradients?

Equal density throughout
Highest density at transit nodes decreasing outward✔️
Lowest density at transit stations
Random density distribution

Correct Answer Logic:

TOD principles dictate highest densities within 400-800m (5-10 minute walk) of transit stations, gradually decreasing with distance. This maximizes ridership, supports commercial viability, and reduces automobile dependence through concentrated, mixed-use development around transit nodes.

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Mathematics QUESTION #1332

Question 397

For a parabola $y^2=4ax$, the latus rectum is the chord through the focus perpendicular to the axis. Its $x$-coordinate is:

$a$✔️
$2a$
$4a$

Correct Answer Logic:

For the parabola $y^2=4ax$, the focus is at $(a,0)$. The latus rectum is the vertical chord through the focus, so it is at $x=a$. The arc from vertex $(0,0)$ to the latus rectum end ($x=a$) is used to find the center of mass of the corresponding surface of revolution.

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General Science and Ability QUESTION #263

Question 398

The heavy water is:

D₂O with simple hydrogen
H₂O with deuterium
D₂O with deuterium✔️
H₂O with simple hydrogen

Correct Answer Logic:

Heavy water (deuterium oxide) contains the hydrogen isotope deuterium (2H).

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Urdu QUESTION #5128

Question 399

درست جملے کی نشاندہی کریں۔

علاج سے مرض بڑھتی گئی۔
علاج سے مرض بڑھتا گیا۔
علاج سے مرض بڑھ گئی۔✔️
علاج سے مرض بڑھتی رہی۔

Correct Answer Logic:

مرض مونث ہے اس لیے 'بڑھ گئی' درست ہے۔ 'بڑھتا گیا' مذکر کے لیے ہے۔

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Mechanical Engineering QUESTION #2413

Question 400

For a floating or submerged body, stability requires that the metacentric height $GM$ satisfies:

$GM < 0$ (overturning moment)
$GM > 0$ (righting moment — metacenter M above center of gravity G)✔️
$GM = 0$ (neutral stability only)
$GM$ must equal the center of buoyancy height

Correct Answer Logic:

Stability: metacentric height $GM=KB+BM-KG>0$ for stable equilibrium. When $GM>0$, any heel generates a righting moment restoring the body to upright.

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