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Chemistry QUESTION #7110

Given the half-cell reactions:
1. $Mn^{2+} + 2e^{-} \rightarrow Mn$; $E^{0} = -1.18\text{ V}$
2. $Mn^{3+} + e^{-} \rightarrow Mn^{2+}$; $E^{0} = +1.51\text{ V}$
Determine the $E^{0}$ for the disproportionation reaction $3Mn^{2+} \rightarrow Mn + 2Mn^{3+}$ and its feasibility.

-0.33 V; non-spontaneous
-0.33 V; spontaneous
-2.69 V; non-spontaneous✔️
-2.69 V; spontaneous

Correct Answer Logic:

The target reaction is $3Mn^{2+} \rightarrow Mn + 2Mn^{3+}$. This is the sum of:
Reduction: $Mn^{2+} + 2e^{-} \rightarrow Mn$ ($E^{0}_{red} = -1.18\text{ V}$)
Oxidation: $2Mn^{2+} \rightarrow 2Mn^{3+} + 2e^{-}$ ($E^{0}_{ox} = -1.51\text{ V}$)
$E^{0}_{cell} = E^{0}_{cathode} - E^{0}_{anode} = -1.18 - 1.51 = -2.69\text{ V}$. Since $E^{0}_{cell}$ is negative, the reaction is non-spontaneous.

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General Knowledge QUESTION #2584

Question 7042

Which of the following BEST defines a computer?

A device used only to browse the internet and send emails
A device that stores and processes data by performing calculations✔️
A machine that only displays text and images on a screen
A tool used exclusively for storing documents and photos

Correct Answer Logic:

A computer is defined as a device that stores and processes data by performing calculations. It takes raw input data, processes it, and produces meaningful output — making it far more than just a browsing or display device.

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Civil Procedure QUESTION #3691

Question 7043

During discovery in a federal case, a party fails to produce documents specifically requested. The opposing party immediately files a motion for sanctions, including a request for attorney's fees. How should the court handle the motion?

Grant the motion immediately because discovery rules are self-executing.
Deny the motion unless the movant includes a certification that they in good faith conferred or attempted to confer with the party failing to act.✔️
Grant the motion but only if the non-moving party's failure was willful and in bad faith.
Deny the motion because attorney's fees are never available for discovery disputes.

Correct Answer Logic:

Rule 37(a)(1) requires that a motion for an order compelling disclosure or discovery must include a certification that the movant has in good faith conferred or attempted to confer with the person or party failing to make disclosure or discovery.

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Pakistan Affairs QUESTION #287

Question 7044

The Muslim rulers of Delhi in the Pre-Mughal era were called Sultans as they were bound to:

Avoid further expansion
Nominate their successors
Seek recognition from the Caliph after acquiring power✔️
Wage Jihad against the infidels

Correct Answer Logic:

Legally, a Sultan was a representative of the Abbasid Caliph and sought a 'Manshur' (investiture).+1

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English QUESTION #2776

Question 7045

Which ONE WORD means: 'The study of ancient cultures by digging up remains'?

Geology
Astrology
Archaeology✔️
Anthropology

Correct Answer Logic:

'Archaeology' is the study of human history and prehistoric cultures through excavation and analysis of artifacts and remains. Geology studies Earth's physical structure; Astrology studies celestial bodies' supposed influence on humans; Anthropology studies human societies.

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MCQs Section QUESTION #5239

Question 7046

میں نے یہ بال دھوپ میں سفید نہیں کیے۔ علمِ بیان کی رو سے یہ کیا ہے؟

تعریض
مجازِ مرسل
کنایہ✔️
استعارہ

Correct Answer Logic:

یہ کنایہ ہے کیونکہ بال دھوپ میں سفید نہیں کیے، اس سے مراد ہے کہ تجربہ اور عمر کا ثبوت ہے۔

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Education QUESTION #6722

Question 7047

A teacher asks students to break down a complex argument into its components, identify logical fallacies, and examine evidence quality. This activity PRIMARILY develops:

Knowledge recall
Analytical thinking skills✔️
Creative synthesis
Rote memorization

Correct Answer Logic:

Analysis involves breaking wholes into parts, examining relationships, and identifying organizational structures. Identifying argument components, logical fallacies, and evidence quality are analytical processes requiring examination and critical evaluation of elements.

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General Knowledge QUESTION #2587

Question 7048

A government office is creating a policy to train clerical staff in using email, spreadsheets, and internet browsers. This initiative directly addresses which of the following issues?

Open Source adoption
The Digital Divide✔️
ASCII encoding limitations
Logic gate failures

Correct Answer Logic:

The digital divide is the growing skills gap between people with and without digital literacy skills. Training clerical staff in basic digital tools directly bridges this gap by improving their digital literacy.

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General Knowledge QUESTION #4776

Question 7049

What is the capital city of Argentina?

Columbia
Barcelona
Buenos Aires✔️
Lima

Correct Answer Logic:

Buenos Aires is the capital and largest city of Argentina. It serves as the seat of the federal government and is the cultural and economic center of the country.

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Mathematics QUESTION #7464

Question 7050

If 0 ≤ x < 2π, then the number of real values of x which satisfy the equation $\cos x + \cos 2x + \cos 3x + \cos 4x = 0$, is:

5
7✔️
9
3

Correct Answer Logic:

Grouping: $(\cos x + \cos 4x) + (\cos 2x + \cos 3x) = 0$. Using sum-to-product: $2\cos\frac{5x}{2}\cos\frac{3x}{2} + 2\cos\frac{5x}{2}\cos\frac{x}{2} = 0$, which gives $2\cos\frac{5x}{2}(\cos\frac{3x}{2} + \cos\frac{x}{2}) = 0$. Either $\cos\frac{5x}{2} = 0$ or $\cos\frac{3x}{2} + \cos\frac{x}{2} = 0$. For $\cos\frac{5x}{2} = 0$: $\frac{5x}{2} = \frac{\pi}{2}, \frac{3\pi}{2}, \frac{5\pi}{2}, \frac{7\pi}{2}, \frac{9\pi}{2}$, giving $x = \frac{\pi}{5}, \frac{3\pi}{5}, \pi, \frac{7\pi}{5}, \frac{9\pi}{5}$ (5 solutions). For $\cos\frac{3x}{2} + \cos\frac{x}{2} = 0$: $2\cos x \cos\frac{x}{2} = 0$. This gives $\cos x = 0$ (solutions $x = \frac{\pi}{2}, \frac{3\pi}{2}$) or $\cos\frac{x}{2} = 0$ (solution $x = \pi$, already counted). Checking: $\frac{\pi}{2}$ and $\frac{3\pi}{2}$ are not in the first set. Total = 5 + 2 = 7.

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Physics QUESTION #7039

Question 7051

In SI units, a material's density is $128 \text{ kg m}^{-3}$. Calculate its numerical value in a system where the unit of length is $25 \text{ cm}$ and the unit of mass is $50 \text{ g}$.

$40$✔️
$16$
$640$
$410$

Correct Answer Logic:

Using $n_1 u_1 = n_2 u_2$:

$128 \times [\text{kg} \cdot \text{m}^{-3}] = n_2 \times [(50 \text{ g}) \cdot (25 \text{ cm})^{-3}]$

$n_2 = 128 \times \left( \frac{1000 \text{ g}}{50 \text{ g}} \right) \times \left( \frac{25 \text{ cm}}{100 \text{ cm}} \right)^3$

$n_2 = 128 \times 20 \times \left( \frac{1}{4} \right)^3 = \frac{128 \times 20}{64} = 2 \times 20 = 40$.

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Agriculture Economics QUESTION #11864

Question 7052

Economic profit differs from accounting profit because economic profit subtracts:

Only explicit (cash) costs
Both explicit and implicit (opportunity) costs✔️
Only implicit costs
Depreciation only

Correct Answer Logic:

Economic profit is total revenue minus both explicit costs and implicit opportunity costs, unlike accounting profit which ignores opportunity costs.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3212

Question 7053

'Insulin' lowers blood glucose by:

Promoting glucose uptake by cells✔️
Breaking down glycogen in the liver
Increasing fat breakdown
Decreasing protein synthesis

Correct Answer Logic:

Insulin acts as a 'key' to let glucose enter the cells.

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General Knowledge QUESTION #8603

Question 7054

After migrating to Medina, what was the first important action of the Holy Prophet (SAW)?

Built a Mosque for prayers✔️
Built his house
Created Bait-ul-maal
Raised an army

Correct Answer Logic:

The first task was building the Masjid al-Nabawi.

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Electrical Engineering QUESTION #2193

Question 7055

In a CMOS inverter with $V_{DD} = 3.3\,\text{V}$, NMOS parameters $k_n = 2\,\text{mA/V}^2$, $V_{tn} = 0.5\,\text{V}$, and PMOS parameters $k_p = 1\,\text{mA/V}^2$, $|V_{tp}| = 0.5\,\text{V}$, the switching threshold $V_M$ (where $V_{out} = V_{in}$) is approximately:

$1.26\,\text{V}$✔️
$1.65\,\text{V}$
$0.99\,\text{V}$
$2.00\,\text{V}$

Correct Answer Logic:

$V_M = \frac{V_{tn}+\sqrt{k_p/k_n}(V_{DD}-|V_{tp}|)}{1+\sqrt{k_p/k_n}} = \frac{0.5+\sqrt{0.5}(2.8)}{1+\sqrt{0.5}} = \frac{0.5+1.980}{1.707} = \frac{2.480}{1.707} \approx 1.26\,\text{V}$. The threshold is below $V_{DD}/2 = 1.65\,\text{V}$ because $k_p < k_n$.

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Math Physics Chemistry Biology QUESTION #7747

Question 7056

Which statement is true for an X-linked dominant trait?

All daughters of affected father are affected✔️
Half of daughters of affected father are affected
No son of affected mother is affected
No daughter of affected father is affected

Correct Answer Logic:

Affected father (XᴰY) passes Xᴰ to all daughters (who become affected) and Y to sons (unaffected). Affected mother (XᴰXᵈ) passes Xᴰ to half of sons and daughters.

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Civil Engineering QUESTION #6590

Question 7057

A continuous beam covering two spans is to be analysed using the stiffness matrix method, with two nodes assigned per element. The order of the resulting structural stiffness matrix will be:

2×2
4×4
6×6✔️
12×12

Correct Answer Logic:

With 2 spans (2 elements) and 2 nodes per element, there are 3 unique nodes. Each beam node has 2 DOFs (vertical displacement and rotation), giving $3 \times 2 = 6$ DOFs. Structural stiffness matrix order $= 6 \times 6$.

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Paper-II (Pharmacology and Social Behaviour, Law & Ethics and Computer Sciences) QUESTION #5787

Question 7058

When Federal and State laws regarding pharmacy practice conflict, the pharmacist must:

Follow Federal only
Follow State only
Follow the most restrictive✔️
Follow the least restrictive

Correct Answer Logic:

In legal conflicts, the more restrictive law must be followed[cite: 7].

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HR and Management QUESTION #6481

Question 7059

The text's definition of 'Human' as 'Homo-sapiens – Social Animal' emphasizes:

Biological classification of humans
People's inherent need for social interaction in organizations✔️
Evolutionary superiority of humans
Scientific approach to studying people

Correct Answer Logic:

Defining humans as 'social animals' emphasizes people's inherent need for social interaction in organizational contexts. This recognition is fundamental to HRM - people aren't isolated units but social beings whose interactions and relationships must be managed.

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General Knowledge QUESTION #8776

Question 7060

The term 'Hung Parliament' describes a situation in which:

Prime Minister avoids Parliament sessions
Prime Minister refuses to step down after no-confidence
No single party has a majority in the house✔️
The ruling party lost majority in the upper house

Correct Answer Logic:

Hung Parliament means no party has an absolute majority.

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