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Chemistry QUESTION #462

Question 3481

Ethanol-water is __________ mixture.

Azeotropic✔️
Ideal
Benedict's
Aliphatic

Correct Answer Logic:

Ethanol-water forms an azeotrope

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Others section QUESTION #4802

Question 3482

The International Day for the Elimination of Violence Against Women is observed annually on which date?

25th December
23rd November
25th November✔️
8th March

Correct Answer Logic:

The International Day for the Elimination of Violence against Women is observed on November 25 each year, designated by the United Nations to raise awareness about gender-based violence.

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Pakistan Affairs QUESTION #300

Question 3483

What role did the Pakistan Army play in the 2011 Abbottabad Operation?

Unaware until completion✔️
Actively collaborated
Provided intelligence support
Attempted to thwart

Correct Answer Logic:

Pakistan officially stated it was a unilateral U.S. operation conducted without prior notice.+1

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Psychology QUESTION #1473

Question 3484

Which of the following factors is most likely to influence the accuracy of eyewitness testimony?

The eyewitness's level of education
The eyewitness's emotional state during the event✔️
The time of day the event occurs
The presence of the police during the event

Correct Answer Logic:

Research by Elizabeth Loftus and others has shown that the eyewitness's emotional state during the event is a major factor affecting memory accuracy. High emotional arousal (especially fear or stress) can impair accurate encoding and recall — the 'weapon focus effect' is one example. Post-event misinformation, leading questions, and stress also distort memories. Education level and time of day have relatively little direct effect on accuracy.

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Agronomy QUESTION #2032

Question 3485

Multiple cropping differs from mono-cropping in that multiple cropping:

Uses more synthetic inputs per unit area
Grows two or more crops on the same land in the same year, either sequentially or simultaneously, achieving greater land productivity (LER > 1)✔️
Exclusively refers to relay cropping where crops are planted before the previous crop is harvested
Requires larger farm machinery and is only feasible on large farms

Correct Answer Logic:

Multiple cropping grows more than one crop per year on the same land (double, triple cropping or intercropping). Land Equivalent Ratio (LER) measures efficiency: LER > 1 means intercropping is more productive per unit land than monoculture. It improves resource use efficiency and farm income.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3333

Question 3486

Which type of microscope is used to see the detailed 'Internal' structures of a cell?

Light Microscope
Scanning Electron Microscope (SEM)
Transmission Electron Microscope (TEM)✔️
Magnifying glass

Correct Answer Logic:

TEM passes electrons through thin slices of a specimen for high-resolution internal imaging.

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Public Administration QUESTION #2913

Question 3487

What is the primary objective promoted by the concept of Network Governance?

Inter-organizational coordination✔️
Hierarchical control
Formal association
Centralized decision-making

Correct Answer Logic:

Network governance emphasizes collaboration and partnerships between various public, private, and non-profit actors to solve complex problems.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #2985

Question 3488

A $1:500$ (w/v) solution is equivalent to what percentage concentration?

$0.02\%$
$0.2\%$✔️
$2\%$
$0.5\%$

Correct Answer Logic:

$1/500 = 0.002$. Multiplying by $100$ gives $0.2\%$.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3299

Question 3489

'Active Immunity' differs from 'Passive Immunity' because it involves:

Injection of pre-formed antibodies
The body's own production of antibodies and memory cells✔️
A short duration of protection
No immune response

Correct Answer Logic:

Active immunity is slower to develop but provides long-lasting protection.

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Biology Zoology Botany QUESTION #1358

Question 3490

In dicot plants, the first leaf-like structure that emerges from the seed is called:

Hypocotyl
Cotyledon✔️
Epicotyl
Radicle

Correct Answer Logic:

Cotyledons are the seed leaves (embryonic leaves) present inside the seed. In dicots there are two cotyledons. They are the first leaf-like structures to emerge from a germinating seed and often serve as the primary source of nutrition for the seedling. The hypocotyl is the stem below cotyledons; epicotyl is above; radicle becomes the root.

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Biology QUESTION #4231

Question 3491

CFTR gene that encode a protein which regulate:

Protein and salt
Salt and Water✔️
Sugar and Water
Liquid and Protein

Correct Answer Logic:

CFTR regulates salt and water transport.

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City and Regional Planning QUESTION #5004

Question 3492

In landscape ecology, what does 'edge effect' refer to?

Boundary between administrative zones
Ecological changes at habitat boundaries✔️
Urban-rural fringe development
Waterfront development patterns

Correct Answer Logic:

Edge effect describes changes in species composition, microclimate, and ecological processes at the boundary between two habitats (forest-field, wetland-upland). Increased fragmentation creates more edges, affecting biodiversity and ecosystem function—critical for ecological planning.

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Psychology QUESTION #1472

Question 3493

Which model of stress focuses on how an individual appraises a situation as stressful based on their perceived ability to cope?

The Transactional Model of Stress✔️
The General Adaptation Syndrome (GAS)
The Social Readjustment Rating Scale (SRRS)
The Cognitive-Behavioral Model

Correct Answer Logic:

The Transactional Model of Stress (Lazarus and Folkman, 1984) proposes that stress arises from the transaction between the person and the environment. Stress depends on: (1) primary appraisal — is this situation threatening or challenging? and (2) secondary appraisal — do I have the resources to cope? If demands exceed perceived coping resources, stress results. GAS (Selye) focuses on physiological response stages; SRRS ranks life events by stress level.

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Basic Mathematics QUESTION #4557

Question 3494

If $40\%$ of a number is $20$, what is the number?

$8$
$50$✔️
$60$
$80$

Correct Answer Logic:

Let number = $x$. Then $0.4x = 20$, so $x = \frac{20}{0.4} = 50$

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Pharmacokinetics and Pharmacodynamics QUESTION #3839

Question 3495

Small incremental dose increases of which drug may result in disproportionately large increases in plasma drug levels due to saturable (zero-order) kinetics?

Phenytoin✔️
Warfarin
Digoxin
Carbamazepine

Correct Answer Logic:

Phenytoin exhibits saturable Michaelis–Menten (non-linear) pharmacokinetics. Once hepatic enzymes are saturated, small dose increases cause disproportionate rises in plasma levels with potential toxicity.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3240

Question 3496

Which molecule acts as the 'Primary Driver' for the diffusion of oxygen from alveoli into the blood?

Partial pressure gradient of $O_2$✔️
Active transport proteins
Water pressure
Blood sugar levels

Correct Answer Logic:

Gases move from areas of high partial pressure to low partial pressure.

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Mechanical Engineering QUESTION #2477

Question 3497

A kinematic pair of the 5th class (full kinematic pair) such as a revolute (pin) joint in a planar mechanism removes how many degrees of freedom from relative motion between two links?

$1$ DOF
$2$ DOF
$5$ DOF✔️
$3$ DOF

Correct Answer Logic:

A kinematic pair of the $j$th class removes $j$ DOF from the relative motion of the connected links. A 5th-class pair removes 5 DOF, leaving 1 DOF.

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Physics QUESTION #4383

Question 3498

If two speakers emit sound at the same frequency and phase, maximum loudness occurs when:

Path difference $= \dfrac{\lambda}{2}$
Path difference $= \lambda$✔️
Path difference $= \dfrac{\lambda}{4}$
Path difference $= \dfrac{3\lambda}{4}$

Correct Answer Logic:

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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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #2971

Question 3499

Which container is specifically designed to prevent the entry of air and moisture?

Light-resistant container
Hermetically sealed container✔️
Well-closed container
Tamper-evident container

Correct Answer Logic:

Hermetically sealed containers are air-tight and impervious to air and other gases under normal conditions.

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Therapeutics and Patient Care QUESTION #3875

Question 3500

What is the first-line pharmacological treatment for a confirmed infestation with \textit{Sarcoptes scabiei}?

Permethrin✔️
Mebendazole
Malathion
Tinidazole

Correct Answer Logic:

Topical permethrin $5\%$ cream is the first-line treatment for scabies, applied to all body surfaces from neck down and washed off after $8$–$14$ hours.

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