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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3414

Question 3101

Water is considered a 'Polar Solvent' because:

It is found at the poles
It has a partial positive and partial negative charge✔️
It is very cold
It does not mix with anything

Correct Answer Logic:

The oxygen atom is electronegative, creating a dipole.

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Chemistry QUESTION #7193

Question 3102

In the estimation of nitrogen using the Dumas method, $0.3 \text{ g}$ of an organic compound yielded $50 \text{ mL}$ of nitrogen gas collected at $300 \text{ K}$ and $715 \text{ mm Hg}$ pressure. Determine the percentage of nitrogen in the compound. (Aqueous tension at $300 \text{ K} = 15 \text{ mm Hg}$)

15.46%
17.46%✔️
16.46%
18.46%

Correct Answer Logic:

First, calculate the volume of nitrogen at STP ($P_1V_1/T_1 = P_2V_2/T_2$):

$P_1 = 715 - 15 = 700 \text{ mm Hg}$ [cite: 3, 53]
$V_1 = 50 \text{ mL}$, $T_1 = 300 \text{ K}$ [cite: 18]
$V_{STP} = \frac{700 \times 50 \times 273}{300 \times 760} \approx 41.9 \text{ mL}$ [cite: 19]
Mass of $N_2 = \frac{28 \times 41.9}{22400} \approx 0.0524 \text{ g}$ [cite: 54]
$\% \text{ Nitrogen} = \frac{0.0524}{0.3} \times 100 \approx 17.46\%$ [cite: 56]

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Accounting & Finance QUESTION #9614

Question 3103

Which of the following errors CANNOT be detected by a Trial Balance?

An entry posted to the wrong side of the correct account
An entire transaction recorded twice in the books
A transaction posted to the wrong head of account with the correct amount✔️
A mathematical addition error on the credit side of an account

Correct Answer Logic:

A Trial Balance only verifies mathematical accuracy (i.e., total debits = total credits). If a transaction is posted to the wrong head of account but with equal debit and credit, or if a transaction is omitted entirely (both debit and credit omitted), or if a transaction is duplicated (both sides again equal), the Trial Balance remains balanced and detects none of these. Option D (an arithmetic error on one side) would cause an imbalance and would be detected.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3052

Question 3104

The abbreviation 'stat.' stands for:

In a state
Immediately✔️
Stationary
Standard

Correct Answer Logic:

'Statim' (stat.) means at once/immediately.

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General Knowledge QUESTION #4755

Question 3105

Qantas is the national airline of which country?

USA
Australia✔️
Singapore
New Zealand

Correct Answer Logic:

Qantas (Queensland and Northern Territory Aerial Services) is the flag carrier of Australia, founded in 1920 and the world's third oldest airline.

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Psychology QUESTION #9868

Question 3106

Psychosomatic disorders are best illustrated by:

Asthma caused by anxiety✔️
Neurotic anxiety
Depression caused by tuberculosis
Over-eating

Correct Answer Logic:

Psychosomatic disorders are physical illnesses in which psychological factors play a significant causal role. Asthma triggered by anxiety is the textbook example — stress directly triggers physiological changes causing genuine respiratory symptoms.

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General Knowledge QUESTION #8683

Question 3107

What does 'amicus curiae' mean in law?

An American
An Australian
A friend of the court✔️
None of above

Correct Answer Logic:

Amicus curiae is 'friend of the court' who offers information.

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General Knowledge QUESTION #4723

Question 3108

H5N1 is classified as which of the following?

A medicine
A vaccine
A virus✔️
A bacterium

Correct Answer Logic:

H5N1 is a subtype of the influenza A virus that causes highly pathogenic avian influenza. It gained global attention in 2005–2006 as a potential pandemic threat.

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Education QUESTION #6709

Question 3109

According to constructivist principles, learning is MOST effective when:

Teachers transmit knowledge clearly and systematically
Students actively construct understanding through experience and social interaction✔️
Content is broken into small sequential steps
Learning objectives are behaviorally specified

Correct Answer Logic:

Constructivism (Piaget, Vygotsky) posits that learners actively build knowledge through experiences and social interaction rather than passively receiving information. Learning involves constructing mental models, not just absorbing transmitted content.

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English QUESTION #8436

Question 3110

Identify the incorrectly spelled word:

Tournament
Omniient✔️
Government
Refreshment

Correct Answer Logic:

'Omniient' is misspelled; correct is 'Omniscient'.

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Security Measures to Maintain Law and Order QUESTION #928

Question 3111

What is the goal of 'Behavioral Detection' in a terminal?

Counting passengers
Identifying stress indicators in individuals✔️
Checking ticket validity
Monitoring retail sales

Correct Answer Logic:

Observing signs of nervousness or agitation helps identify persons who may intend to commit an unlawful act.

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Mathematics QUESTION #6013

Question 3112

The solution of the differential equation $\dfrac{dy}{dx} = (x-y)^2$, subject to $y(1)=1$, is:

$\ln\left|\dfrac{2-x}{2-y}\right| = x-y$
$-\ln\left|\dfrac{1-x+y}{1+x-y}\right| = 2(x-1)$✔️
$\ln\left|\dfrac{1+x-y}{1-x+y}\right| = x+y-2$
$-\ln\left|\dfrac{2-y}{2-x}\right| = 2(y-1)$

Correct Answer Logic:

Let $v = x - y$, so $\frac{dv}{dx} = 1 - \frac{dy}{dx} = 1 - v^2$.

Separate: $\frac{dv}{1-v^2} = dx \Rightarrow \frac{1}{2}\ln\left|\frac{1+v}{1-v}\right| = x + C$

i.e. $\ln\left|\frac{1+x-y}{1-x+y}\right| = 2x + C'$

At $(1,1)$: $v=0$, $\ln(1)=2+C' \Rightarrow C'=-2$

Final: $-\ln\left|\dfrac{1-x+y}{1+x-y}\right| = 2(x-1)$ which matches option B.

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Dairy Food Science and Technology QUESTION #5961

Question 3113

The lactose content of milk accounts for approximately what percentage of its caloric content?

$5\%$
$27\text{–}30\%$
$45\text{–}50\%$✔️
$70\%$

Correct Answer Logic:

Lactose ($\approx 4.8\%$ in milk, $4\;\text{kcal/g}$) provides approximately $28\text{–}30\%$ of total milk calories. Whole milk energy: fat ($3.5\% \times 9\;\text{kcal/g} \approx 3.2\;\text{kcal/100 mL}$), protein ($3.2\% \times 4 \approx 1.3\;\text{kcal}$), lactose ($4.8\% \times 4 \approx 1.9\;\text{kcal}$). Lactose share $= \frac{1.9}{6.4} \approx 30\%$.

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Education QUESTION #7560

Question 3114

A test that covers the entire syllabus of a subject reflects which important quality?

Comprehensive✔️
Objective oriented
Authentic
None of these

Correct Answer Logic:

A comprehensive test includes content from all areas of the syllabus, ensuring broad sampling of the knowledge and skills taught throughout the course.

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Islamic Studies QUESTION #363

Question 3115

Ibn e Khaldoon, the famous historian/sociologist, was born in:

Iraq
Egypt
Syria
Tunisia✔️

Correct Answer Logic:

He was born in Tunis in 1332 AD.+1

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Psychology QUESTION #9761

Question 3116

The capacity to perceive the world in three dimensions and to judge distances is called:

Depth perception✔️
Illusion
Delusion
None of these

Correct Answer Logic:

Depth perception is the visual ability to see the world in three dimensions and estimate object distances. It relies on monocular cues (perspective) and binocular cues (retinal disparity). Illusion is a misperception; delusion is a false belief.

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Pakistan Affairs QUESTION #4669

Question 3117

Which district of Pakistan has the lowest population density?

Khuzdar
Kalat
Kharan✔️
Chagai

Correct Answer Logic:

Kharan district in Balochistan has one of the lowest population densities in Pakistan, given its vast desert terrain and sparse settlements.

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Islamic Studies QUESTION #7616

Question 3118

شاہ عبدالقادر نے قرآن کا ترجمہ کس زبان میں کیا؟

اردو✔️
فارسی
انگریزی
ان میں سے کوئی نہیں

Correct Answer Logic:

شاہ عبدالقادر نے شاہ رفیع الدین کے ساتھ مل کر قرآن کا اردو ترجمہ 'موضح القرآن' کے نام سے کیا۔

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Pharmacokinetics and Pharmacodynamics QUESTION #3841

Question 3119

For what pharmacokinetic reason is epinephrine (adrenaline) incorporated into some injectable local anaesthetic preparations?

Decrease the local action of the anaesthetic
Reduce local blood flow✔️
Increase the amount of local anaesthetic to administer
Block nerve fibres by depolarising the membrane

Correct Answer Logic:

Epinephrine causes local vasoconstriction, thereby reducing blood flow to the injection site. This slows systemic absorption of the local anaesthetic, prolonging its duration of action and reducing toxicity.

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Boilers Mechanical Engineering QUESTION #2375

Question 3120

The transfer function $Y(s)$ of a linear control system is defined as:

The ratio of the output signal to the input signal in the time domain
The ratio of the Laplace transform of the output $X_o(s)$ to the Laplace transform of the input $X_i(s)$, with all initial conditions equal to zero✔️
The differential equation describing the system
The frequency response of the system

Correct Answer Logic:

The transfer function: $Y(s) = X_o(s)/X_i(s)$ with zero initial conditions. It is defined only for linear, constant-parameter systems. It relates input and output in the Laplace (s) domain.

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