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Total mass of hydrogen in a $75 \text{ kg}$ person = $10\%$ of $75 = 7.5 \text{ kg}$.
$^1H$ has a mass of approximately $1 \text{ u}$, while $^2H$ (Deuterium) has a mass of $2 \text{ u}$.
Replacing all $^1H$ with $^2H$ effectively doubles the mass of the hydrogen component.
Weight gain = New mass - Original mass = $15 \text{ kg} - 7.5 \text{ kg} = 7.5 \text{ kg}$.

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Physics QUESTION #7063

Question 1184

A thin convex lens made of crown glass ($\mu = 3/2$) has a focal length $f$ in air. It is subsequently measured in two different liquids with refractive indices $4/3$ and $5/3$, yielding focal lengths $f_1$ and $f_2$ respectively. Which relationship correctly describes these focal lengths?

$f_2 > f$ and $f_1$ becomes negative
$f_1$ and $f_2$ both become negative
$f_1 = f_2 < f$
$f_1 > f$ and $f_2$ becomes negative✔️

Correct Answer Logic:

Using the Lens Maker's Formula: $\frac{1}{f} = \left( \frac{\mu_{lens}}{\mu_{medium}} - 1 \right) \left( \frac{1}{R_1} - \frac{1}{R_2} \right)$.

In Liquid 1 ($\mu = 4/3$): Since $3/2 > 4/3$, the lens remains converging. However, the term $(\frac{\mu_l}{\mu_m} - 1)$ decreases compared to air, so the focal length increases ($f_1 > f$).
In Liquid 2 ($\mu = 5/3$): Since $3/2 < 5/3$, the refractive index of the medium is greater than the lens. This makes the term $(\frac{\mu_l}{\mu_m} - 1)$ negative, meaning the lens becomes diverging ($f_2$ is negative).

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Adult Health [Medicine and Surgery] QUESTION #3917

Question 1185

A 25-year-old female presents with unexplained weight loss, fine tremors, and heat intolerance. Her pulse is $100/ ext{min}$, and she has a smooth goiter with observable lid lag. Which of the following is the most likely diagnosis?

Graves' disease✔️
Toxic multinodular goiter
De Quervain's thyroiditis
Hashimoto's thyroiditis

Correct Answer Logic:

No explanation provided for this question.

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English QUESTION #8386

Question 1186

DISDAIN means:

Humility
Contempt✔️
Respect
None of these

Correct Answer Logic:

Disdain means contempt or scorn.

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Urdu QUESTION #5296

Question 1187

نرم تہ گام کی ترکیب کا مفہوم کیا ہے؟

مبارک قدم
مخصوص قدم
تیز قدم
سست قدم✔️

Correct Answer Logic:

نرم تہ گام کا مطلب ہے آہستہ قدم یعنی سست روی سے چلنا (متن میں آپشن 3 سست قدم ہے)۔

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General Knowledge QUESTION #4801

Question 1188

The International Day for the Elimination of Racial Discrimination is observed on which date?

23rd May
21st March✔️
1st March
10th December

Correct Answer Logic:

The International Day for the Elimination of Racial Discrimination is observed on March 21 each year, commemorating the 1960 Sharpeville massacre in South Africa.

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Security Measures to Maintain Law and Order QUESTION #920

Question 1189

What is the primary role of a CCTV system in an airport environment?

Recording staff breaks
Monitoring for suspicious activities✔️
Managing passenger flow only
Entertainment for visitors

Correct Answer Logic:

Surveillance systems provide real-time situational awareness and forensic evidence for security breaches.

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Paper-I (Pharmaceutics II (Industrial and Quality Control) and Pharmaceutics III (Hospital and Community Pharmacy)) QUESTION #5707

Question 1190

For an isotonic solution, the freezing point depression ($\Delta T_{f}$) must be equal to:

$-0.52^{\circ}C$✔️
$-0.90^{\circ}C$
$0.00^{\circ}C$
$-1.12^{\circ}C$

Correct Answer Logic:

Blood and lacrimal fluid have a freezing point depression of $-0.52^{\circ}C$.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3416

Question 1191

Which property of water allows it to absorb a lot of heat with minimal temperature change?

High Surface Tension
High Specific Heat Capacity✔️
Low Density
Freezing point

Correct Answer Logic:

This helps in maintaining body temperature (thermoregulation).

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Dairy Food Science and Technology QUESTION #5880

Question 1192

During butter churning, what physical transformation occurs to fat globules?

Fat globules dissolve into an emulsion
The oil-in-water emulsion ($\approx 40\%$ fat) inverts to a water-in-oil emulsion ($\approx 80\%$ fat)✔️
Fat globules are broken into smaller droplets
Crystalline fat melts and re-solidifies around water

Correct Answer Logic:

Churning converts cream (oil-in-water emulsion, $\approx 40\%$ fat) into butter (water-in-oil emulsion, $\approx 80\%$ fat). Mechanical agitation disrupts fat globule membranes, releasing liquid fat that aggregates around partially crystalline globules, forming butter grains.

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General Knowledge QUESTION #8761

Question 1193

A 'dosimeter' is a device used to measure:

Nuclear radiation for safety purposes✔️
The speed of wind or gas
Heat radiation
High temperatures

Correct Answer Logic:

Dosimeters measure radiation exposure.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #2996

Question 1194

Which of the following is an example of an 'Aromatic Water'?

Normal Saline
Peppermint Water✔️
Simple Syrup
Calamine Lotion

Correct Answer Logic:

Aromatic waters are saturated solutions of volatile oils or aromatic substances in water.

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English QUESTION #2741

Question 1195

What is the correct direct speech of: 'She told me that she had finished the work.'?

She said 'I finished the work.'
She said 'I have finished the work.'✔️
She said 'I had finished the work.'
She said 'I will finish the work.'

Correct Answer Logic:

When converting from indirect to direct speech, the past perfect 'had finished' goes back one step to present perfect 'have finished'. So 'I have finished the work' is correct.

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General Knowledge QUESTION #4487

Question 1196

Advances in _____ enable personalized treatments based on individual makeup.

Telemedicine
Genomic medicine✔️
Robotic medicine
None of these

Correct Answer Logic:

Genomic medicine enables personalized healthcare.

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Education QUESTION #6914

Question 1197

The 'cognitive-affective curriculum' approach advocates integrating affective objectives into lesson plans alongside cognitive ones. What is the management rationale for this integration?

Affective objectives replace cognitive content, freeing up time for behavioral instruction
Behavioral change is gradual and requires sustained, curriculum-embedded reinforcement — drastic or isolated interventions do not produce lasting change✔️
Affective objectives increase test scores by making students emotionally invested in content
Integrating affective objectives allows teachers to reduce the number of formal disciplinary interventions needed each term

Correct Answer Logic:

The cognitive-affective curriculum recognizes that behavior modification happens over time through repeated, embedded experiences — not through one-off interventions. By weaving socio-emotional objectives consistently through lessons across all subjects, schools create the conditions for gradual, internalized behavioral change. This is more sustainable than disciplinary procedures applied reactively.

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Administration QUESTION #9581

Question 1198

Pakistan's Islamic Economic System initiatives include the Mudarabah Companies Ordinance 1980 and the introduction of Profit and Loss Sharing (PLS) accounts. Which fundamental principle distinguishes Islamic finance from conventional banking, and what structural challenge has limited its full implementation in Pakistan?

Prohibition of gharar (uncertainty) — conventional banks hedge uncertainty through derivatives which Islamic banks cannot use, limiting risk management capacity
Prohibition of riba (interest) — replacing fixed interest with profit/loss sharing requires banks to act as equity partners rather than creditors, creating asset-liability mismatches and requiring sophisticated project appraisal capacities that many Pakistani banks lack✔️
Mandatory zakat deduction — the obligation to distribute 2.5% of assets annually reduces the capital available for Islamic banks to deploy as financing
Prohibition of haram industries — screening out non-compliant sectors restricts the investable universe and reduces portfolio diversification

Correct Answer Logic:

Riba prohibition is the central distinguishing principle. The shift from interest to PLS fundamentally changes bank economics — banks become risk-sharing equity partners whose returns depend on project performance rather than contractual interest. This demands sophisticated credit appraisal, creates asset-liability duration mismatches, and requires legal/accounting frameworks that Pakistan's system has only partially developed, explaining the incomplete transition.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #2978

Question 1199

The British Pharmacopoeia (BP) is updated and published annually by the:

British Medical Association
British Pharmacopoeia Commission✔️
Royal Pharmaceutical Society
World Health Organization

Correct Answer Logic:

The BP Commission is responsible for the annual publication of the British Pharmacopoeia.

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Planning QUESTION #4995

Question 1200

Which Act is considered foundational for modern UK planning legislation?

Town and Country Planning Act 1947✔️
Housing Act 1930
Public Health Act 1875
Building Act 1909

Correct Answer Logic:

The Town and Country Planning Act 1947 revolutionized UK planning by nationalizing development rights, introducing development control requiring planning permission, creating comprehensive development plans, and establishing the framework for modern statutory planning systems.

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