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An oxidizing agent is itself reduced. In option A, the oxidation state of Oxygen in $H_{2}O_{2}$ changes from $-1$ to $-2$ (in $H_{2}O$).
Since the oxidation state decreases, $H_{2}O_{2}$ is reduced, meaning it acted as an oxidizing agent for the Iodide ions ($I^{-}$ to $I_{2}$).

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Physics QUESTION #7225

Question 4

What are the dimensions of the magnetic field $B$ in terms of $C$ (coulomb), $M$, $L$, and $T$?

$M^1L^1T^{-2}C$
$M^1L^0T^{-1}C^{-1}$✔️
$M^1L^0T^{-2}C$
$M^1L^1T^{-1}C$

Correct Answer Logic:

From the Lorentz force: $F = qvB$

$[B] = \dfrac{[F]}{[q][v]} = \dfrac{MLT^{-2}}{C \cdot LT^{-1}} = MT^{-1}C^{-1} = M^1L^0T^{-1}C^{-1}$

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The Constitution of Pakistan QUESTION #9372

Question 5

A person convicted of an offence involving moral turpitude and sentenced to imprisonment for not less than two years is disqualified from parliamentary membership under Article 63(1)(h). When does this disqualification end?

After completing the sentence
Five years after release from imprisonment✔️
Two years after release
Permanently

Correct Answer Logic:

Article 63(1)(h) disqualifies a person who has been convicted for an offence involving moral turpitude and sentenced to not less than two years imprisonment, 'unless a period of five years has elapsed since his release.' Both the nature of the offence (moral turpitude) and the minimum sentence threshold (2 years) must be met.

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Boilers Mechanical Engineering QUESTION #2392

Question 6

The final value theorem, used to find the steady-state output $x_o(\infty)$ from the Laplace transform $X_o(s)$, states:

$x_o(\infty) = \lim_{s\to\infty} s X_o(s)$
$x_o(\infty) = \lim_{s\to 0} s X_o(s)$✔️
$x_o(\infty) = \lim_{s\to 0} X_o(s)$
$x_o(\infty) = \lim_{s\to\infty} X_o(s)$

Correct Answer Logic:

Final value theorem: $x_o(\infty)=\lim_{t\to\infty}x_o(t)=\lim_{s\to0}sX_o(s)$. Valid when all poles of $sX_o(s)$ are in the left-half s-plane. Used to find steady-state error without inverting the Laplace transform.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3123

Question 7

The 'Glomerulus' is a network of capillaries primarily involved in:

Reabsorption
Filtration✔️
Secretion
Storage

Correct Answer Logic:

Blood is filtered in the glomerulus under high pressure.

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MCQs Section QUESTION #4871

Question 8

Correct antonym of "BI-PARTISAN" is

Narrow minded✔️
Progressive
Representing two parties
Divided

Correct Answer Logic:

Bi-partisan means involving cooperation between two political parties. Its antonym is 'narrow minded,' implying a refusal to cooperate or consider opposing viewpoints.

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Islamic Studies QUESTION #8255

Question 9

Which was the last major expedition led by the Holy Prophet (PBUH)?

Tabook✔️
Conquest of Mecca
Khyber
Badar

Correct Answer Logic:

The Battle of Tabuk (9 AH / 630 CE) was the last major military expedition led by the Prophet (PBUH) himself. It was undertaken against the Byzantine Empire in response to reports of their planned attack on Muslims. The Prophet led 30,000 Muslims to Tabuk (in northern Arabia), but the Byzantines did not engage. This expedition demonstrated Muslim strength, led to peace treaties with several Christian tribes, and consolidated Islam's position in Arabia. The Prophet never personally led another military expedition after Tabuk.

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Dairy Food Science and Technology QUESTION #5957

Question 10

In dairy plant design, 'pasteurized product contamination by raw milk' in plate heat exchangers (PHE) is prevented by:

Using thicker gaskets between raw and pasteurized milk channels
Designing the regeneration section with higher pressure on the pasteurized side ($\geq 14\;\text{kPa}$ or $2\;\text{psi}$ above raw milk pressure) than the raw milk side✔️
Using separate PHEs for raw and pasteurized milk
Monitoring conductivity of milk streams

Correct Answer Logic:

In HTST PHE regeneration sections, regulations require that pasteurized milk pressure exceed raw milk pressure by $\geq 14\;\text{kPa}$ ($2\;\text{psi}$), ensuring that any leakage is from pasteurized to raw (not raw to pasteurized), preventing contamination of the pasteurized product stream.

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General Knowledge QUESTION #8763

Question 11

The Liaquat-Nehru Pact of 1950 primarily dealt with which issue?

Minorities and refugees problem✔️
Distribution of assets
Distribution of river waters
Kashmir issue

Correct Answer Logic:

The pact aimed to protect minorities and address refugees after partition.

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English QUESTION #8357

Question 12

Are you conscious _______ your responsibility in this matter?

about
of✔️
after
on

Correct Answer Logic:

'Conscious of' means aware of.

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Federal Rules of Evidence (US) QUESTION #3784

Question 13

In a civil case, the court takes 'judicial notice' of the fact that it was raining in the city on July 4th, 2023, based on certified weather records. The court instructs the jury that they 'must accept this fact as conclusive.' Is this instruction proper?

No, in civil cases, the jury has the discretion to reject judicially noticed facts.
Yes, in civil cases, the court must instruct the jury to accept a judicially noticed fact as conclusive under Rule 201(f).✔️
No, judicial notice is only for 'law,' not 'facts.'
Yes, but only if the parties stipulated to the fact beforehand.

Correct Answer Logic:

Rule 201(f) states that in a civil action, the court must instruct the jury to accept the noticed fact as conclusive. In a criminal case, however, the court must instruct the jury that it *may or may not* accept the fact as conclusive.

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

Question 14

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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Mathematics QUESTION #1259

Question 15

Are the vectors $\mathbf{a}=(1,2,3)$, $\mathbf{b}=(2,5,7)$, $\mathbf{c}=(1,3,5)$ linearly dependent or independent?

Linearly independent
Linearly dependent✔️
Cannot be determined
Orthogonal

Correct Answer Logic:

Form the matrix and compute the determinant: $\begin{vmatrix}1&2&3\\2&5&7\\1&3&5\end{vmatrix} = 1(25-21)-2(10-7)+3(6-5) = 4-6+3=1 \neq 0$. Wait: $= 1(25-21)-2(10-7)+3(6-5)=4-6+3=1$. Det$\neq 0$ means linearly independent. Actually recomputing: $5\times5-7\times3=25-21=4$; $2\times5-7\times1=10-7=3$; $2\times3-5\times1=6-5=1$. Det$=1(4)-2(3)+3(1)=4-6+3=1\neq0$. Linearly independent.

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Dairy Food Science and Technology QUESTION #5882

Question 16

In cheese making, coagulation of milk by rennet involves:

Reduction of pH by lactic acid bacteria
Proteolytic cleavage of $\kappa$-casein by chymosin at the $\text{Phe}_{105}\text{–Met}_{106}$ bond✔️
Calcium precipitation of whey proteins
Denaturation of $\beta$-lactoglobulin by heat

Correct Answer Logic:

Chymosin specifically cleaves $\kappa$-casein at the $\text{Phe}_{105}\text{–Met}_{106}$ peptide bond, releasing the hydrophilic glycomacropeptide (GMP) into whey. This removes steric stabilization of casein micelles, allowing calcium-mediated aggregation and gel formation.

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General Abilities QUESTION #4491

Question 17

If $a = -12$ and $b = 4$, what is $\frac{a}{b}$?

$-3$✔️
$3$
$-8$
$-16$

Correct Answer Logic:

Dividing a negative by a positive gives a negative result. $\frac{-12}{4} = -3$

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Pharmacology and Toxicology QUESTION #3853

Question 18

Through which mechanism does allopurinol lower serum uric acid levels?

To increase renal excretion of uric acid
To inhibit formation of uric acid✔️
To inhibit absorption of dietary purines
To inhibit prostaglandin synthesis

Correct Answer Logic:

Allopurinol inhibits xanthine oxidase, thereby reducing the enzymatic conversion of hypoxanthine and xanthine to uric acid.

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Math Physics Chemistry Biology QUESTION #808

Question 19

Which is not a calcareous material?

Clay✔️
Marble
Lime
Marine shell

Correct Answer Logic:

Calcareous materials contain calcium carbonate $(\text{CaCO}_3)$. Marble, lime, and marine shells are all calcareous. Clay is an aluminosilicate and is not calcareous.

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Civil / Architecture QUESTION #2352

Question 20

In the Moment Distribution Method, when the far end of a member is pinned, the modified stiffness $K'$ used at the near end to avoid iterating carry-over to the pinned end is:

$K' = \dfrac{EI}{L}$
$K' = \dfrac{2EI}{L}$
$K' = \dfrac{3EI}{L}$✔️
$K' = \dfrac{4EI}{L}$

Correct Answer Logic:

Modified stiffness for far-end pinned: $K' = \dfrac{3EI}{L}$ (versus $\dfrac{4EI}{L}$ for far-end fixed). Using this modified stiffness means the carry-over factor to the pinned end is zero, so the pin does not need to be balanced in subsequent distribution cycles, simplifying the computation significantly.

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