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Islamic Studies QUESTION #650

Question 301

The title of "Amin-ul-Ummat" was given to:

Hazrat Abu Ubaidah bin Jarah✔️
Hazrat Khalid bin Walid
Hazrat Saad bin Abi Waqas
None of these

Correct Answer Logic:

The Prophet (ﷺ) called Abu Ubaidah bin Jarah the "Trustworthy of this Ummah."

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Education QUESTION #7602

Question 302

Which elements are most useful in making decisions about instructional planning?

Objectives✔️
Aims
Goals
None of these

Correct Answer Logic:

Instructional objectives provide specific, measurable statements of what students should be able to do after instruction, guiding all planning decisions.

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Civil Engineering QUESTION #6610

Question 303

For a steel plate under tension with staggered holes, the 'net area' ($A_n$) calculation uses the $s^2/4g$ correction factor. What do $s$ and $g$ represent?

s = span, g = gap
s = longitudinal pitch, g = transverse gage✔️
s = size of bolt, g = grade of steel
s = stress, g = gravity

Correct Answer Logic:

When paths are staggered, the net width is reduced by the hole diameters and increased by $s^2/4g$ for each diagonal segment, where $s$ is the longitudinal spacing (pitch) and $g$ is the transverse spacing (gage).

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Dairy Food Science and Technology QUESTION #5985

Question 304

In dairy, 'thermophilic' starter cultures (used in yoghurt, Swiss cheese, mozzarella) have an optimal growth temperature of:

$10\text{–}20^{\circ}\text{C}$
$37\text{–}45^{\circ}\text{C}$✔️
$55\text{–}65^{\circ}\text{C}$
$25\text{–}30^{\circ}\text{C}$

Correct Answer Logic:

Thermophilic LAB ($S.\;thermophilus$, $L.\;bulgaricus$, $L.\;helveticus$) have optimum growth temperatures of $37\text{–}45^{\circ}\text{C}$. Mesophilic starters ($Lc.\;lactis$, $Leuconostoc$) have optimum at $20\text{–}30^{\circ}\text{C}$. This distinction determines incubation temperature: yoghurt at $40\text{–}43^{\circ}\text{C}$.

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Physics QUESTION #7013

Question 305

A magnetic needle has magnetic moment $9.85 \times 10^{-2}\ \text{A/m}^2$ and moment of inertia $5 \times 10^{-6}\ \text{kg\,m}^2$. It performs 10 complete oscillations in 5 seconds in a uniform magnetic field. Find the magnitude of the field in mT.
(Take $\pi^2 = 9.85$)

10 mT✔️
20 mT
5 mT
1 mT

Correct Answer Logic:

Time period: $T = \frac{5}{10} = 0.5\ \text{s}$

Formula for oscillation: $T = 2\pi\sqrt{\frac{I}{MB}}$

$B = \frac{4\pi^2 I}{MT^2} = \frac{4 \times 9.85 \times 5\times10^{-6}}{9.85\times10^{-2} \times (0.5)^2}$

$= \frac{4 \times 9.85 \times 5\times10^{-6}}{9.85\times10^{-2} \times 0.25} = \frac{20\times10^{-5}}{2.4625\times10^{-3}} = 0.01\ \text{T} = 10\ \text{mT}$

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Boilers Mechanical Engineering QUESTION #2536

Question 306

A force $\mathbf{F} = 3\hat{i} + 4\hat{j}$ N acts at point $P(2,\,1,\,0)$ m. The moment vector about the origin is:

$5\hat{k}$ N·m✔️
$-5\hat{k}$ N·m
$8\hat{k}$ N·m
$2\hat{k}$ N·m

Correct Answer Logic:

Moment $\mathbf{M}=\mathbf{r}\times\mathbf{F}=(2\hat{i}+\hat{j})\times(3\hat{i}+4\hat{j})$. Cross product: $(2\cdot4-1\cdot3)\hat{k}=(8-3)\hat{k}=5\hat{k}$ N·m.

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Islamic Studies QUESTION #235

Question 307

Dar-e-Arqam was located in:

Hudaybiyah
Quba
Madinah Munawarah
None of these✔️

Correct Answer Logic:

Dar-e-Arqam was the early secret meeting place for Muslims in Makkah.

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Chemistry QUESTION #1007

Question 308

RBr undergoes Grignard reaction (Mg, dry ether) followed by hydrolysis ($\text{H}_2\text{O}$) to give 2-methylbutane. The maximum number of structural isomers of RBr that can produce 2-methylbutane is:

5
4✔️
3
1

Correct Answer Logic:

2-Methylbutane is $\text{CH}_3\text{CH(CH}_3\text{)CH}_2\text{CH}_3$. The Grignard reagent RMgBr reacts with water to give R–H. So R– must be a fragment of 2-methylbutane: 1-methylbutyl, 2-methylbutyl, 1-methyl-1-propyl, neopentyl, and isobutyl radicals. Counting distinct structural isomers of RBr gives 4.

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Reading and Writing (Module-1) QUESTION #5439

Question 309

Ancestral Puebloans dispersed in late 1200s, abandoning villages. Turkey remains at Mesa Verde share genetic markers with modern Rio Grande turkeys after 1280. Thus, researchers concluded that ____

terrain conditions in Rio Grande and Mesa Verde were more similar in the past.
some Ancestral Puebloans migrated to Rio Grande Valley in late 1200s with farming practices.✔️
Rio Grande peoples primarily planted crops and didn't cultivate turkeys before 1280.
Mesa Verde Puebloans adopted farming practices from other regions.

Correct Answer Logic:

Shared genetic markers after 1280 suggest migration of turkeys (and likely people) from Mesa Verde to Rio Grande.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3308

Question 310

'Aerosols' are a major route of transmission for which type of diseases?

Foodborne
Waterborne
Airborne (Respiratory)✔️
Vector-borne

Correct Answer Logic:

Tiny droplets suspended in the air can carry pathogens like those causing TB or Flu.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #2964

Question 311

Which of the following is a 'Water-in-Oil' (W/O) emulsifying agent?

Sodium Lauryl Sulfate
Wool Fat✔️
Acacia
Tragacanth

Correct Answer Logic:

Wool fat (Lanolin) is a common W/O emulsifying agent, whereas Acacia is an O/W agent.

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MCQs Section QUESTION #4903

Question 312

A migraine typically afflicts one side of the head, lasts for hours or days, and may recur _____.

as infrequently as once every other month or often, as daily
as infrequently as once every other month or as often as daily✔️
infrequently, as often as once every other month, or often, like
infrequently, like once every other month, or often, like

Correct Answer Logic:

It uses fully parallel 'as…as' constructions: 'as infrequently as once every other month or as often as daily.' Option A omits the second 'as,' breaking the parallel. Options C and D incorrectly use 'like' in place of 'as' in comparative constructions. Option E mixes constructions inconsistently.

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Chemistry QUESTION #7412

Question 313

Which of the following lanthanoid ions is diamagnetic (second instance question — verifying Yb)? [Which of the following orders of ionic radii is correctly represented?]

$\text{H}^- > \text{H}^+ > \text{H}$
$\text{Na}^+ < \text{F}^- < \text{O}^{2-}$✔️
$\text{F}^- > \text{O}^{2-} > \text{Na}^+$
$\text{Al}^{3+} > \text{Mg}^{2+} > \text{N}^{3-}$

Correct Answer Logic:

Ionic radii comparison:
Na⁺, F⁻, O²⁻ are isoelectronic (10 electrons). Increasing radius means decreasing nuclear charge:

Na⁺: Z=11 → smallest
F⁻: Z=9
O²⁻: Z=8 → largest

So: Na⁺ < F⁻ < O²⁻ ✓

Option (1) is wrong: H has 1 proton; H⁻ is larger (more electron repulsion) and H⁺ has no electron at all (just a proton, ~10⁻¹⁵ m). Option (4) is wrong as N³⁻ >> Al³⁺ in size.

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General Abilities QUESTION #4506

Question 314

If $0 < x < 1$, which is largest?

$x$
$x^2$
$\sqrt{x}$✔️
All equal

Correct Answer Logic:

For $0 < x < 1$: $x^2 < x < \sqrt{x}$. Example: if $x = 0.25$, then $x^2 = 0.0625$, $x = 0.25$, $\sqrt{x} = 0.5$

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Urdu QUESTION #5263

Question 315

مسدس کے ہر بند میں کتنے مصرے ہوتے ہیں؟

چار
پانچ
چھ✔️
آٹھ

Correct Answer Logic:

مسدس میں ہر بند چھ مصروں پر مشتمل ہوتا ہے۔ اس کا ہر بند دو قافیوں پر مختتم ہوتا ہے۔

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Education QUESTION #7585

Question 316

The most valid way to assess students' problem-solving skills is:

Oral quiz
Written objective test
Real-life task or case study✔️
True/False questions

Correct Answer Logic:

Real-life tasks or case studies provide the most valid assessment of problem-solving because they require authentic application of critical thinking in meaningful contexts.

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Physical Education QUESTION #6814

Question 317

In modern Physical Education, the 'Psychomotor Domain' refers to:

The memorization of sports history
The development of manual and physical skills and coordination✔️
The emotional response to losing a game
The ability to write a research paper on biomechanics

Correct Answer Logic:

The psychomotor domain focuses on the link between cognitive processes and physical movement/coordination.

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Chemistry QUESTION #7364

Question 318

The threshold frequency of a metallic surface is $5 \times 10^{13}$ s$^{-1}$. When light of frequency $1 \times 10^{14}$ s$^{-1}$ falls on it, the maximum kinetic energy of the emitted electrons is:

$3.3 \times 10^{-21}$ J
$3.3 \times 10^{-20}$ J✔️
$6.6 \times 10^{-21}$ J
$6.6 \times 10^{-20}$ J

Correct Answer Logic:

Einstein's photoelectric equation: $KE_{max} = h(\nu - \nu_0)$

$KE = 6.63 \times 10^{-34} \times (10^{14} - 5\times10^{13})$
$= 6.63 \times 10^{-34} \times 5 \times 10^{13}$
$= 33.15 \times 10^{-21}$
$\approx 3.3 \times 10^{-20}$ J

The excess energy above the threshold (work function) appears entirely as kinetic energy of the emitted photoelectron.

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Federal Rules of Evidence (US) QUESTION #3794

Question 319

During a civil trial, a witness for the plaintiff testifies. On cross, the defense asks a question that implies the witness is lying because he was paid a bribe by the plaintiff. On redirect, the plaintiff offers a statement the witness made to his wife *before* the alleged bribe was paid, which is consistent with his trial testimony. Is the statement admissible?

No, it's hearsay.
Yes, as non-hearsay to rebut a charge of recent fabrication or improper motive under Rule 801(d)(1)(B).✔️
No, because the statement was made to his wife and is privileged.
Yes, but only for impeachment and not as substantive evidence.

Correct Answer Logic:

Rule 801(d)(1)(B) defines as 'not hearsay' a prior consistent statement offered to rebut a charge of recent fabrication or improper influence/motive, provided the statement was made *before* the motive to lie arose.

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Planning QUESTION #4991

Question 320

Which planning approach best describes Jane Jacobs' advocacy in 'The Death and Life of Great American Cities'?

Top-down comprehensive planning
Bottom-up incremental development✔️
Modernist urban renewal
Garden City movement

Correct Answer Logic:

Jacobs advocated for organic, bottom-up development respecting existing neighborhoods, mixed uses, short blocks, and diverse building ages, opposing top-down modernist planning and urban renewal that destroyed functioning neighborhoods through wholesale clearance.

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