Reading Mode - Questions

Maximum loudness (constructive interference) occurs when the path difference is a whole number multiple of wavelength: $\Delta x = n\lambda$ where $n = 0, 1, 2, ...$. For $n=1$, path difference $= \lambda$.

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Chemistry QUESTION #1426

Question 5345

The solubility of a gas in a liquid is directly proportional to the partial pressure of the gas above the liquid. This statement is based upon:

Raoult's law
Henry's law✔️
Kohlrausch's law
None of these

Correct Answer Logic:

Henry's Law states: $C = k_H \cdot P$, where $C$ is the concentration of dissolved gas, $P$ is the partial pressure of the gas above the liquid, and $k_H$ is Henry's law constant. Raoult's law relates vapour pressure of solutions; Kohlrausch's law relates molar conductivity of electrolytes at infinite dilution.

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Physics QUESTION #1027

Question 5346

The current passing through the battery in the given circuit (5V source with complex resistor network including $1.5\Omega, 5\Omega, 2.5\Omega, 5.5\Omega, 6\Omega, 3\Omega, 1.5\Omega, \frac{1}{3}\Omega$):

2.5 A
1.5 A
2.0 A✔️
0.5 A

Correct Answer Logic:

Analysing the circuit by combining resistors: the network simplifies to a total resistance of $2.5\ \Omega$ across the 5V battery. Current $= \frac{5}{2.5} = 2.0\ \text{A}$.

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Chemistry QUESTION #1432

Question 5347

Potentiometric titration involves measurement of:

Current in the reaction
Volume at equivalence
Electrode potential as a function of titrant added✔️
None of these

Correct Answer Logic:

Potentiometric titration involves monitoring the electrode potential (voltage) of the solution as a function of the volume of titrant added. The equivalence point is identified by a sharp change (inflection point) in the potential-volume curve. It uses a reference electrode and an indicator electrode immersed in the analyte solution, and is particularly useful for coloured or turbid solutions.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3248

Question 5348

'Cyanosis' is most easily observed in which areas?

Hair and nails
Lips, tongue, and nail beds✔️
Shoulders
Knees

Correct Answer Logic:

Thin-skinned areas with rich blood supply show the blue tint of deoxygenated blood clearly.

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Ability / HR / Governance / Special Education QUESTION #5656

Question 5349

A CFAO discovers that departmental accounts have not been reconciled with CGA/AGPR figures for three consecutive months. Under his duties what is the MOST SERIOUS institutional risk this creates?

Risk of salary delays for government servants
Risk of undetected unauthorized expenditure going unreported to Parliament and the PAC because the liability register and actual figures will diverge — rendering financial control and audit ineffective✔️
Risk of loss of budget allocation for the next year
Risk that the Financial Adviser will be held personally liable

Correct Answer Logic:

The CFAO must systematize maintenance of accounts and their timely reconciliation with CGA/AGPR figures and maintenance of the Liability Register. Failure to reconcile means that unauthorized expenditure excess spending and liabilities cannot be detected compared against the actual figures — this fundamentally undermines the entire financial control architecture including audit PAC accountability and the PAO's personal answerability. This is analytically the most serious institutional risk.

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Tourism & Hospitality Management QUESTION #1582

Question 5350

In the context of Pakistan's tourist destinations, which of the following categories correctly classifies the tourism resources covered in the course?

Only natural and cultural heritage resources
Natural resources (landforms, water bodies, biota), cultural heritage resources (Muslim, Buddhist, Sikh, Hindu), and neotourism (ecotourism, medical, MICE, pilgrimage)✔️
Adventure sports and gastronomic tourism only
National parks, hill stations, and urban commercial attractions only

Correct Answer Logic:

The Pakistan Tourist Destinations course systematically classifies resources into three categories: natural (mountains, deserts, beaches, flora-fauna), cultural heritage (multi-religious sites, fairs, museums), and neotourism destinations (ecotourism, camping, medical, MICE, pilgrimage tourism, and CPEC benefits).

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Urdu QUESTION #5030

Question 5351

غلط املا کا انتخاب کریں۔

جنہوں✔️
تمہیں
انہوں
ان میں سے کوئی نہیں

Correct Answer Logic:

درست املا 'جنھوں' ہے، 'جنہوں' غلط ہے۔ 'انھوں' اور 'تمھیں' درست ہیں۔

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Commerce QUESTION #6060

Question 5352

An amount specifically set aside to cover anticipated losses from bad debts is called a:

Provision✔️
Appropriation
Reserve
Commission

Correct Answer Logic:

A Provision is an amount set aside out of profits to cover a known or likely future expense or loss — such as expected bad debts. It is created when the loss is probable but the exact amount is uncertain. A reserve is set aside from profits for general purposes (not a specific liability). An appropriation is a distribution of profits (e.g., dividends). A commission is a fee or charge, not a set-aside.

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Dairy Food Science and Technology QUESTION #5899

Question 5353

During spray drying of milk, if outlet temperature is too HIGH, the primary consequence is:

Product moisture content will be too high causing caking
Product will be over-dried causing scorching/browning and loss of heat-sensitive nutrients✔️
Fat will separate and coat the powder particles
Powder will not reconstitute properly in water

Correct Answer Logic:

High outlet temperature in a spray dryer results in over-drying: excessive moisture loss below target ($3\text{–}4\%$), scorching of powder particles on chamber walls, Maillard browning, loss of lysine and heat-sensitive vitamins, and poor solubility of reconstituted powder.

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Security Measures to Maintain Law and Order QUESTION #866

Question 5354

The ultimate goal of combining "Security Measures" with "Ethics" is to ensure:

Total fear
Public Trust and Safety✔️
Faster boarding
Higher fines

Correct Answer Logic:

Effective law and order are only sustainable if the public trusts that security measures are applied fairly, legally, and ethically.

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Chemistry QUESTION #5533

Question 5355

The reaction $2X \to B$ is a zeroth order reaction. With initial $[X] = 0.2\ M$, the half-life is 6 h. Starting from $[X]_0 = 0.5\ M$, how long (in hours) does it take for $[X]$ to fall to 0.2 M?

9.0 h✔️
12.0 h
18.0 h
7.2 h

Correct Answer Logic:

For zeroth order: $t_{1/2} = \frac{[A]_0}{2k}$. Given $[X]_0=0.2\ M$ and $t_{1/2}=6\ h$: $k = \frac{0.2}{2\times6} = \frac{1}{60}\ M\,h^{-1}$. Now starting from $[X]_0=0.5\ M$, time to reach 0.2 M: $t = \frac{[A]_0 - [A]}{k} = \frac{0.5-0.2}{1/60} = 0.3\times60 = 18\ h$.

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Reading and Writing (Module-1) QUESTION #5405

Question 5356

Earth's atmosphere is bombarded by cosmic dust originating from several sources: short-period comets (SPCs), particles from the asteroid belt (ASTs), Halley-type comets (HTCs), and Oort cloud comets (OCCs). Some of the dust's material vaporizes in the atmosphere in a process called ablation, and the faster the particles move, the higher the rate of ablation. Astrophysicist Juan Diego Carrillo-Sánchez led a team that calculated average ablation rates for elements in the dust (such as iron and potassium) and showed that material in slower-moving SPC or AST dust has a lower rate than the same material in faster-moving HTC or OCC dust. For example, whereas the average ablation rate for iron from AST dust is 28%, the average rate for _______. Which choice most effectively uses data from the table to complete the example?

iron from SPC dust is 20%.
sodium from OCC dust is 100%.
iron from HTC dust is 90%.✔️
sodium from AST dust is 75%.

Correct Answer Logic:

The example illustrates lower ablation in slower-moving AST dust (28% for iron) versus higher ablation in faster-moving HTC dust (90% for iron).

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Basic Mathematics QUESTION #4605

Question 5357

Simplify: $(x^3)(x^2)$

$x^5$✔️
$x^6$
$x^9$
$2x^5$

Correct Answer Logic:

When multiplying same base, add exponents: $x^3 \times x^2 = x^{3+2} = x^5$

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General Knowledge QUESTION #170

Question 5358

The Book 'Pakistan Political and Constitutional Engineering' was written by:

Hassan Askari
Ilhan Niaz
Mahboob Ahmad✔️
None of these

Correct Answer Logic:

Dr. Mahboob Ahmad is the author of this detailed historical and political study.

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Ability / HR / Governance / Special Education QUESTION #5652

Question 5359

A civil servant is appointed to a post through FPSC and the appointing authority wishes to grant him 8 advance increments at initial pay fixation. The post has sufficient qualified candidates available at the minimum pay scale. Under Annex-I powers for fixation of initial pay what is the CORRECT position?

Up to 6 premature increments may be granted after the FPSC's recommendation regardless of candidate availability
No premature increments should be granted because the requisite qualified persons ARE available at the minimum of the pay scale making the condition for premature increments unsatisfied✔️
The PAO has full discretion to grant any number of advance increments for FPSC-appointed staff
Up to 8 advance increments may be granted since FPSC recommended the appointment

Correct Answer Logic:

Premature increments for FPSC-appointed persons should be granted on the FPSC's recommendations AND in consideration of the fact that suitable persons of requisite qualifications are NOT available at the minimum pay of the post. Since qualified candidates are available at the minimum scale the fundamental precondition is not met and no premature increments should be granted.

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Paper-II (Pharmacology and Social Behaviour, Law & Ethics and Computer Sciences) QUESTION #5784

Question 5360

Which management function involves influencing people so that they will contribute to organization goals?

Planning
Organizing
Leading✔️
Controlling

Correct Answer Logic:

Leading is the process of influencing people toward goals[cite: 7].

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