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Therapeutics and Patient Care QUESTION #3903

What is the standard initial daily starting dose for venlafaxine when initiating treatment for depression or anxiety?

$37.5$ mg daily
$150$ mg daily
$75$ mg daily✔️
$300$ mg daily

Correct Answer Logic:

Venlafaxine is typically initiated at $75$ mg per day ($37.5$ mg twice daily or $75$ mg XR once daily) and titrated as needed up to a maximum of $375$ mg/day.

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City and Regional Planning QUESTION #4951

Question 2

What is the primary objective of Heritage Conservation?

To prevent all changes
To preserve cultural and historical significance✔️
To increase tourism only
To restrict development

Correct Answer Logic:

Heritage Conservation aims to preserve buildings, sites, and areas of cultural and historical significance while allowing appropriate adaptive use and development that respects heritage values.

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Islamic Studies QUESTION #632

Question 3

The basic obligatory action of Hajj is:

Wuquf-e-Arafat✔️
Rami
Tawaf-e-Ziyarat
None of these

Correct Answer Logic:

Wuquf (standing) at Arafat is the most essential pillar of Hajj.

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Basic Mathematics QUESTION #2859

Question 4

Solve: $x^2 - 7x + 12 = 0$

x = 3 and x = 4✔️
x = -3 and x = 4
x = 3 and x = -4
x = -3 and x = -4

Correct Answer Logic:

Factorizing: $x^2 - 7x + 12 = (x-3)(x-4) = 0$. So $x = 3$ or $x = 4$. Check: $3 \times 4 = 12$ ✓ and $3 + 4 = 7$ ✓.

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Pakistan Affairs QUESTION #294

Question 5

Which statement best describes the overall trend in Pak-India diplomatic relations?

Continuous peace
Uninterrupted cooperation
Amicable resolution
Periods of tension, conflict, and normalization efforts✔️

Correct Answer Logic:

Relations have been characterized by a cycle of conflict, cold peace, and dialogue.+1

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Biology QUESTION #523

Question 6

Syphilis is caused by

Neisseria gonorrhoeae
Cats worm
Treponema pallidum✔️
Herpes simplex

Correct Answer Logic:

Treponema pallidum causes syphilis

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Statistics QUESTION #1972

Question 7

In hypothesis testing, the probability of committing a Type-I error (rejecting a true null hypothesis) is denoted by:

$\beta$
$\alpha$✔️
$1 - \beta$
$1 - \alpha$

Correct Answer Logic:

Type-I error $(\alpha)$ is the probability of rejecting $H_0$ when it is actually true (false positive). Type-II error $(\beta)$ is the probability of failing to reject $H_0$ when it is false.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3119

Question 8

Hydrochloric Acid (HCl) is secreted by which cells in the stomach?

Chief cells
Parietal cells✔️
Mucous cells
G-cells

Correct Answer Logic:

Parietal cells secrete HCl and intrinsic factor (necessary for Vitamin $B_{12}$ absorption).

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Mechanical Engineering QUESTION #2418

Question 9

Newton's Law of Cooling for convection heat transfer gives the heat flux $q''_{conv}$ as:

$q''_{conv} = k(T_w - T_\infty)/L$
$q''_{conv} = h(T_w - T_\infty)$ where $h$ is the convection coefficient (W/m²·K)✔️
$q''_{conv} = \sigma\varepsilon T_w^4$
$q''_{conv} = \rho c_p (T_w - T_\infty)$

Correct Answer Logic:

Newton's Law of Cooling: $q''_{conv}=h(T_w-T_\infty)$, where $h$ (W/m²·K) is the convection heat transfer coefficient.

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Chemistry QUESTION #1093

Question 10

Which of the following are paramagnetic? A. [NiCl$_4$]$^{2-}$ B. Ni(CO)$_4$ C. [Ni(CN)$_4$]$^{2-}$ D. [Ni(H$_2$O)$_6$]$^{2+}$ E. Ni(PPh$_3$)$_4$

A and D only✔️
A, D and E only
A and C only
B and E only

Correct Answer Logic:

Ni$^{2+}$ is [Ar]3d$^8$. Paramagnetic if unpaired electrons: A: [NiCl$_4$]$^{2-}$: Cl$^-$ is weak field → tetrahedral, sp$^3$, 2 unpaired → paramagnetic ✓. B: Ni(CO)$_4$: Ni(0), CO is strong field → d$^{10}$, diamagnetic. C: [Ni(CN)$_4$]$^{2-}$: CN$^-$ strong field → square planar, dsp$^2$, 0 unpaired → diamagnetic. D: [Ni(H$_2$O)$_6$]$^{2+}$: H$_2$O weak field → octahedral, 2 unpaired → paramagnetic ✓. E: Ni(PPh$_3$)$_4$: Ni(0), d$^{10}$ → diamagnetic. Paramagnetic: A and D.

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Pakistan Affairs QUESTION #4657

Question 11

Pakistan formally left CENTO (Central Treaty Organization) in which year?

1971
1975
1979✔️
1981

Correct Answer Logic:

Pakistan left CENTO in 1979, the same year the organization was dissolved following the Iranian Revolution and the withdrawal of Iran.

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Boilers Mechanical Engineering QUESTION #3983

Question 12

What is the primary purpose of a 'Steam Drum' in a water-tube boiler?

To store fuel
To separate steam from water✔️
To act as a furnace
To increase water temperature

Correct Answer Logic:

The drum provides space for steam to separate from the circulating water/steam mixture.

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Computer Science QUESTION #1141

Question 13

What is a 'Race Condition' in operating systems?

A fast execution mode
Multiple processes accessing and manipulating shared data concurrently✔️
A network speed test
A priority-based task

Correct Answer Logic:

A race condition occurs when the outcome of execution depends on the specific order or timing of access to shared resources by multiple processes.

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Logical Reasoning QUESTION #3940

Question 14

Select the pair with a similar relationship: BREAD : FLOUR

Candy : Sugar✔️
Tire : Rubber
Meat : Animal
Wine : Grapes

Correct Answer Logic:

3

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3235

Question 15

'Uremia' is a clinical condition caused by the buildup of nitrogenous waste due to:

Heart failure
Liver failure
Kidney failure✔️
Lung failure

Correct Answer Logic:

When kidneys fail to filter urea and creatinine, these toxins build up in the blood.

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Biology QUESTION #522

Question 16

Humming birds belong to the category

Heterotherms✔️
Endotherms
Ectotherms
None of these

Correct Answer Logic:

Hummingbirds are heterotherms (can vary body temperature)

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Agronomy QUESTION #2044

Question 17

In the context of integrated nutrient management (INM), the concept of 'nutrient budget' refers to:

The financial cost of purchasing fertilizers per cropping season
Quantitative accounting of all nutrient inputs (fertilizers, manures, BNF, irrigation water, atmospheric deposition) versus nutrient outputs (crop removal, leaching, volatilization, runoff) to determine the net soil nutrient balance✔️
The ratio of organic to inorganic fertilizer inputs on a farm
The recommended fertilizer dose published in government guidelines

Correct Answer Logic:

A nutrient budget is a mass balance: Inputs (fertilizers + manures + BNF + deposition + irrigation) − Outputs (grain + straw removal + leaching + volatilization + runoff) = Net balance. A negative balance indicates soil nutrient mining; a positive balance may indicate over-application risk. INM aims to achieve a balanced or slightly positive budget.

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Biology QUESTION #4250

Question 18

Receptors that are located in the retina of eye are called:

Merkel disc
Ruffini endings
Pacinian corpuscles
Rod and Cone✔️

Correct Answer Logic:

Rod and cone cells are photoreceptors in retina.

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Physics QUESTION #1184

Question 19

The Lorentz force is given by:

F = q(v × B)✔️
Φ = ∂A/∂x + ∂A/∂y + ∂A/∂z
qF = q(v_d × B)
None of these

Correct Answer Logic:

The Lorentz force on a charge $q$ moving with velocity $\vec{v}$ in a magnetic field $\vec{B}$ is $\vec{F} = q(\vec{v} \times \vec{B})$. The full Lorentz force including the electric field is $\vec{F} = q(\vec{E} + \vec{v} \times \vec{B})$. Option (B) is the divergence of vector potential (unrelated), and option (C) has incorrect notation.

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Physics QUESTION #1040

Question 20

A container with $V_1=2\ \text{L},\ n_1=5\ \text{mol},\ p_1=1\ \text{atm}$ and $V_2=3\ \text{L},\ n_2=4\ \text{mol},\ p_2=2\ \text{atm}$ is separated by a thermal insulator. When partition is removed, equilibrium pressure is:

1.4 atm
1.8 atm
1.3 atm
1.6 atm✔️

Correct Answer Logic:

Since the partition is a thermal insulator, after mixing the total internal energy is conserved. For ideal gas: $U \propto nT$. From ideal gas law: $T_1=\frac{p_1V_1}{n_1R}=\frac{1\times2}{5R}=\frac{2}{5R}$ and $T_2=\frac{2\times3}{4R}=\frac{6}{4R}$. Final $T_f = \frac{n_1T_1+n_2T_2}{n_1+n_2}=\frac{5\cdot\frac{2}{5R}+4\cdot\frac{6}{4R}}{9}=\frac{\frac{2}{R}+\frac{6}{R}}{9}=\frac{8}{9R}$. Final $p=\frac{(n_1+n_2)RT_f}{V_1+V_2}=\frac{9R\cdot\frac{8}{9R}}{5}=\frac{8}{5}=1.6\ \text{atm}$.

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