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Chemistry QUESTION #7360

Which of the following statements is INCORRECT about the Bohr atomic model?

It establishes the stability of the atom
It is contradicted by the Heisenberg uncertainty principle✔️
It explains the origin of spectral lines
Electrons behave as both particle and wave

Correct Answer Logic:

Bohr's model limitations:
Option (2) is the wrong statement about a fault — it is actually a correct criticism. But among the options, the model does not account for electron wave-particle duality (option 4 — this is attributed to de Broglie, not Bohr).

Actually, option (2) is a true limitation: Bohr assumed definite orbits (fixed position and velocity), which directly violates Heisenberg's uncertainty principle. The correct answer marked is (2) as the false premise Bohr made. Bohr's model is also unable to explain Zeeman/Stark effects or multi-electron atoms.

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Paper-II (Pharmacology and Social Behaviour, Law & Ethics and Computer Sciences) QUESTION #5801

Question 4202

Effective listening involves which of the following?

Hearing only
Empathy✔️
Avoiding eye contact
Speaking loudly

Correct Answer Logic:

Effective listening involves empathy and focus on the speaker[cite: 7].

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Mathematics QUESTION #1274

Question 4203

The residue of $\dfrac{5Z-2}{Z(Z-1)}$ at $Z=0$ is:

$5$
$-2$
$2$✔️
$3$

Correct Answer Logic:

Using the residue formula for a simple pole: $\text{Res}_{Z=0}=\lim_{Z\to0}Z\cdot\dfrac{5Z-2}{Z(Z-1)}=\lim_{Z\to0}\dfrac{5Z-2}{Z-1}=\dfrac{-2}{-1}=2$.

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Civil / Architecture QUESTION #2337

Question 4204

According to Darcy's law, the seepage quantity $Q$ through a soil sample of cross-sectional area $A$, length $L$, head difference $\Delta h$ and permeability $k$ is:

$Q = k \cdot A \cdot \dfrac{L}{\Delta h}$
$Q = k \cdot \dfrac{\Delta h}{L} \cdot A$✔️
$Q = k \cdot \Delta h \cdot L \cdot A$
$Q = \dfrac{k \cdot A}{\Delta h \cdot L}$

Correct Answer Logic:

Darcy's law: $Q = k \cdot i \cdot A$ where the hydraulic gradient $i = \dfrac{\Delta h}{L}$. Therefore $Q = k \cdot \dfrac{\Delta h}{L} \cdot A$. This linear relationship is valid for laminar flow where velocity is directly proportional to hydraulic gradient.

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Disaster Management QUESTION #6532

Question 4205

A school safety program focuses solely on structural retrofitting. What critical component is missing for comprehensive school safety?

Additional funding
Integration of DRR education in curricula, emergency drills, and non-structural safety measures✔️
More engineers
Government approval

Correct Answer Logic:

Section 11.1 references the Pakistan School Safety Framework (PSSF), which encompasses structural safety, non-structural measures (securing equipment), emergency preparedness (drills), and DRR education. Comprehensive school safety requires all pillars, not just structural interventions.

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Boilers Mechanical Engineering QUESTION #2490

Question 4206

In the contour method of kinetostatic analysis, a closed kinematic chain is converted into two open chains by:

Removing the ground link
Severing one kinematic pair and introducing reaction force unknowns at that pair✔️
Applying inertia forces to all links simultaneously
Setting all angular accelerations to zero

Correct Answer Logic:

The contour method 'mentally disconnects' the kinematic pair $A_i$ between links $i-1$ and $i$, introducing unknown reaction forces $\mathbf{F}_{i-1,i}$ and $\mathbf{F}_{i,i-1}=-\mathbf{F}_{i-1,i}$. The closed chain becomes two open chains.

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MCQs Section QUESTION #5310

Question 4207

یہ مجھے چین کیوں نہیں پڑتا ایک ہی شخص تھا جہاں میں کیا؟

غالب
جان ایلیا✔️
ان میں سے کوئی نہیں
پروین شاکر

Correct Answer Logic:

یہ مشہور شعر جان ایلیا کا ہے جو اپنی انوکھی شاعرانہ فکر اور غمزدہ انداز کے لیے مشہور تھے۔

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Physics QUESTION #7098

Question 4208

A pendulum made of a uniform wire with cross-sectional area $A$ has a time period $T$. When a mass $M$ is attached to the bob, the period becomes $T_M$. If $Y$ is the Young's modulus, find the value of $\frac{1}{Y}$ [cite: 437].

$[(\frac{T_M}{T})^2 - 1]\frac{A}{Mg}$✔️
$[(\frac{T_M}{T})^2 - 1]\frac{Mg}{A}$
$[1 - (\frac{T_M}{T})^2]\frac{A}{Mg}$
$[1 - (\frac{T}{T_M})^2]\frac{A}{Mg}$

Correct Answer Logic:

The time period is $T = 2\pi\sqrt{L/g}$, meaning $L \propto T^2$ [cite: 437].

Initial length $L = kT^2$ and new length $L' = kT_M^2$
Extension $\Delta L = L' - L = k(T_M^2 - T^2)$
Strain $\frac{\Delta L}{L} = \frac{T_M^2 - T^2}{T^2} = (\frac{T_M}{T})^2 - 1$
From $Y = \frac{\text{Stress}}{\text{Strain}} = \frac{Mg/A}{\Delta L/L}$, we get $\frac{1}{Y} = [(\frac{T_M}{T})^2 - 1]\frac{A}{Mg}$[cite: 437, 440].

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Verbal Reasoning QUESTION #8156

Question 4209

Given that $0 < x < y < 1$, compare the two quantities:

Quantity A: $1 - y$

Quantity B: $y - x$

Quantity A is greater
Quantity B is greater
The two quantities are equal
The relationship cannot be determined from the information given✔️

Correct Answer Logic:

We know $0 < x < y < 1$. Let's test specific values to see if the relationship is fixed.

Example 1: $x = 0.1,\ y = 0.2$.
Quantity A: $1 - 0.2 = 0.8$. Quantity B: $0.2 - 0.1 = 0.1$. A > B.

Example 2: $x = 0.1,\ y = 0.9$.
Quantity A: $1 - 0.9 = 0.1$. Quantity B: $0.9 - 0.1 = 0.8$. B > A.

Since the relationship changes depending on the values of $x$ and $y$, it cannot be determined from the information given.

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Civil Procedure QUESTION #3710

Question 4210

A defendant is sued in State X. The defendant believes State Y is a much more convenient forum. The defendant moves to dismiss the case under the doctrine of 'forum non conveniens.' When should the court grant this motion?

Whenever the defendant can show that State Y is slightly more convenient.
Only if State X is a completely improper venue under Rule 12(b)(3).
When an alternative forum is available and the balance of private and public interests strongly favors dismissal.✔️
Never, if the plaintiff is a resident of State X.

Correct Answer Logic:

Forum non conveniens is a discretionary power that allows a court to dismiss a case when an alternative forum is significantly more appropriate, taking into account the interests of the litigants and the public.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3423

Question 4211

'Beri-beri' is a disease caused by the deficiency of:

Vitamin B1 (Thiamine)✔️
Vitamin B2 (Riboflavin)
Vitamin B3 (Niacin)
Vitamin B12

Correct Answer Logic:

Common in populations relying heavily on polished rice.

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Accounting & Finance QUESTION #6220

Question 4212

A 'Credit Note' issued by a vendor is the primary supporting document for which journal?

Purchase Journal
Cash Book
Sales Return Journal✔️
General Journal

Correct Answer Logic:

A credit note issued to a debtor evidences the receipt of returned goods, thereby supporting the Sales Return Journal (Returns Inward).

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Civil Engineering QUESTION #6622

Question 4213

When checking for 'Web Local Yielding' in a beam, the load is assumed to distribute from the outer surface of the flange at a slope of:

1:01
01:02.5
1:05✔️
2.5:1

Correct Answer Logic:

AISC assumes that a concentrated load applied to a flange spreads out at a 1:2.5 slope (1 horizontal for 2.5 vertical). Therefore, the length of the web resisting yielding at the toe of the fillet is $N + 5k$ (for interior loads).

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Library Sciences QUESTION #1535

Question 4214

According to Stueart and Moran (2007), which type of planning establishes an organization's long-term direction, mission, and broad goals, typically covering a 3–5 year horizon?

Operational planning
Contingency planning
Strategic planning✔️
Tactical planning

Correct Answer Logic:

Strategic planning in library management sets the long-term direction of the institution — defining mission, vision, and broad goals over a multi-year horizon. Operational planning deals with day-to-day activities, while tactical planning addresses medium-term implementation steps.

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The Elections Act 2017 QUESTION #9418

Question 4215

Section 22 grants the Commission power to amend the final list of constituencies on its own motion, subject to an important time restriction. Amendments may only be made at least how long before notification of the Election Programme?

Six months
Two months
One month
Four months✔️

Correct Answer Logic:

Section 22(1) states the Commission may amend the final list 'at any time but at least four months before notification of the Election Programme'.

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Security Measures to Maintain Law and Order QUESTION #848

Question 4216

"Profiling" in security measures to maintain order refers to:

Taking photos
Assessing behavioral patterns✔️
Checking bank balance
Social media monitoring

Correct Answer Logic:

Behavioral profiling helps identify individuals who may pose a threat to law and order based on suspicious patterns.

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CISA QUESTION #1737

Question 4217

Which type of audit is specifically focused on comparing the attributes of a finished product against its original design specifications?

Process audit
System audit
Compliance audit
Product audit✔️

Correct Answer Logic:

A product audit systematically compares a finished item — including its physical attributes, dimensions, markings, colour, and features — against the design specifications that governed its production. In the context of IS auditing, this type of audit is particularly relevant when certifying custom-built software or reviewing software prior to release from a development organisation, where the auditor must verify that the delivered product matches what was specified.

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MCQs Section QUESTION #5221

Question 4218

مشہور نظم 'طلوعِ اسلام' کے شاعر کون ہیں؟

حفیظ جالندھری
احسان دانش
علامہ اقبال✔️
الطاف حسین حالی

Correct Answer Logic:

طلوعِ اسلام علامہ اقبال کی مشہور نظم ہے جو بانگِ درا میں شامل ہے۔

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Boilers Mechanical Engineering QUESTION #2501

Question 4219

Poisson's ratio $\nu$ is defined as the ratio of:

$\text{Axial strain}/\text{Lateral strain}$
$\text{Lateral strain}/\text{Axial strain}$ (magnitude)✔️
$\text{Shear strain}/\text{Normal strain}$
$\text{Normal stress}/\text{Lateral stress}$

Correct Answer Logic:

Poisson's ratio: $\nu = -\varepsilon_{lateral}/\varepsilon_{axial}$ (the negative sign makes $\nu$ positive). For most metals, $\nu \approx 0.25\text{–}0.35$.

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General Knowledge QUESTION #8931

Question 4220

Which country does NOT have a written constitution (uncodified)?

USA
Switzerland
UK✔️
Japan

Correct Answer Logic:

The UK has an uncodified constitution.

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