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Chemistry QUESTION #7198

Question 3701

Identify the most stable carbocation among the following species.

$(CH_{3})_{3}C^{+}$✔️
$CH_{3}CH_{2}^{+}$
$CH_{3}^{+}$
$(CH_{3})_{2}CH^{+}$

Correct Answer Logic:

The stability of carbocations follows the order: $3^{\circ} > 2^{\circ} > 1^{\circ} > \text{methyl}$.

$(CH_{3})_{3}C^{+}$ is a tertiary ($3^{\circ}$) carbocation. It is the most stable due to the maximum inductive effect (+I) and hyperconjugation from the nine $\alpha$-hydrogens[cite: 3, 49].

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Urdu QUESTION #1401

Question 3702

ماہِ تمام کس شاعرہ کا کلیات ہے؟

کشور ناہید
پروین شاکر
فہمیدہ ریاض
ادا جعفری✔️

Correct Answer Logic:

''ماہِ تمام'' ادا جعفری کا کلیات ہے۔ ادا جعفری (1924–2015) پاکستان کی پہلی اہم خاتون شاعرہ مانی جاتی ہیں۔ ان کا اصل نام عزیز جہاں تھا۔ انہوں نے محبت، نسائی احساسات اور انسانی رشتوں کو اپنی شاعری کا موضوع بنایا۔ ان کے دیگر مجموعوں میں ''میں ساز ڈھونڈتی رہی'' شامل ہے۔

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English QUESTION #8297

Question 3703

He lives _______ a small income.

On✔️
At
In
With

Correct Answer Logic:

'Live on' is used with income or money.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3109

Question 3704

What is the primary muscle involved in 'Inspiration' (breathing in)?

Intercostal muscle
Diaphragm✔️
Abdominal muscle
Pectoralis major

Correct Answer Logic:

When the diaphragm contracts and flattens, the volume of the thoracic cavity increases, drawing air in.

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Bio-Technology QUESTION #10615

Question 3705

A biotransformation differs from a fermentation in that a biotransformation involves:

Production of biomass as the primary product using a carbon source
One or a few enzymatic conversion steps of a specific substrate to a structurally related product✔️
Complete mineralisation of organic compounds to CO₂ and H₂O
Genetic modification of microorganisms to produce recombinant proteins

Correct Answer Logic:

A biotransformation (bioconversion) uses living cells or isolated enzymes to perform one or a few specific chemical transformations on a substrate — producing a structurally modified product. The cell is used as a catalyst, not primarily for its biosynthetic capacity. Examples: steroid hydroxylation, chiral resolution, acrylamide production from acrylonitrile by nitrile hydratase. In contrast, fermentation refers broadly to microbial production processes, usually involving complex metabolic pathways.

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Verbal Reasoning QUESTION #8170

Question 3706

If $n = 2^3$, what is the value of $n^n$?

$2^{6}$
$2^{11}$
$2^{18}$
$2^{24}$✔️

Correct Answer Logic:

$n = 2^3 = 8$.

$n^n = 8^8 = (2^3)^8 = 2^{3 \times 8} = 2^{24}$.

Answer: $\mathbf{2^{24}}$.

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MBBS QUESTION #10362

Question 3707

Phenylketonuria (PKU) results from deficiency of phenylalanine hydroxylase, the enzyme that normally converts phenylalanine to:

Tyrosine✔️
Tryptophan
Histidine
Homogentisic acid

Correct Answer Logic:

Phenylalanine hydroxylase normally converts phenylalanine to tyrosine; its deficiency causes toxic accumulation of phenylalanine and its byproducts (phenylketones), which if untreated in infancy causes severe, irreversible intellectual disability — prevented by early detection (newborn screening) and strict dietary phenylalanine restriction.

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Electronics Engineering QUESTION #11696

Question 3708

A ceramic disc capacitor of $100\,\text{pF}$ is tested on a DMM capacitance range with a resolution of $1\,\text{nF}$. The meter reads zero. The correct conclusion is:

The capacitor is short-circuited
The capacitor is open-circuited
The capacitor value is below the meter's minimum measurable range✔️
The capacitor is out of tolerance

Correct Answer Logic:

A DMM with $1\,\text{nF}$ resolution cannot reliably measure capacitors smaller than its minimum range. $100\,\text{pF} = 0.1\,\text{nF}$ — well below the resolution. A zero reading here means the capacitor is too small for the instrument, not that it is faulty. An LCR meter or RF impedance analyser with pF resolution is needed.

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Civil Engineering QUESTION #6616

Question 3709

What is the primary reason for using a 'moment connection' instead of a 'shear connection' in a steel frame?

To reduce the cost of fabrication
To allow for easier thermal expansion
To provide lateral stability and resistance to wind/seismic loads✔️
To ensure the beam behaves as a simply supported member

Correct Answer Logic:

Moment connections (Rigid connections) transfer both shear and bending moments, allowing the frame to act as a rigid system that resists lateral forces through frame action (portal effect).

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General Ability and Fire Fighting QUESTION #5627

Question 3710

Which of the following statements about Class D fires is TRUE?

They can be safely extinguished with water
They require wet chemical agents
They involve combustible metals and need specialized dry powder✔️
They are the same as Class B fires

Correct Answer Logic:

Class D fires involve combustible metals like magnesium and potassium. Many of these metals react violently with water

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English Literature QUESTION #10717

Question 3711

Who translated the original Bengali poems of Gitanjali into English?

Sir Edmund Goose
W. B. Yeats
Rev. Edmund Thomson
Rabindranath Tagore✔️

Correct Answer Logic:

Rabindranath Tagore himself translated his Bengali collection Gitanjali (Song Offerings) into English prose poems. The English translation (1912) won him the Nobel Prize in Literature in 1913 — the first non-European to receive it. W. B. Yeats wrote the famous introduction to the English edition and championed Tagore's work, but the translation was Tagore's own.

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Accounting & Finance QUESTION #9659

Question 3712

A firm's goods are sold at a margin of 25% on sales. Purchases = Rs. 155,000; Opening Stock = Rs. 10,000; Closing Stock = Rs. 15,000. What are total Sales?

Rs. 200,000✔️
Rs. 150,000
Rs. 187,500
Rs. 175,000

Correct Answer Logic:

COGS = 10,000 + 155,000 – 15,000 = Rs. 150,000. Margin = 25%, so COGS = 75% of Sales. Sales = 150,000 × 100/75 = Rs. 200,000. The margin formula: Sales = COGS/(1 – Margin%) = 150,000/0.75.

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Psychology QUESTION #9803

Question 3713

In Freud's theory of personality, which of the following statements is correct?

The ego obeys the reality principle✔️
The id operates by secondary process thinking
The superego obeys the pleasure principle
The ego operates by primary process thinking

Correct Answer Logic:

The ego operates on the reality principle using rational, logical (secondary process) thinking. The id operates on the pleasure principle using primary process thinking. The superego represents internalized moral standards.

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CISA QUESTION #6837

Question 3714

An IS auditor reviews project management for a major system implementation. The project is 6 months behind schedule, 200% over budget, and key requirements have been descoped without business owner approval. What is the MOST critical governance failure?

Poor time management
Lack of project oversight and stakeholder engagement in critical decisions✔️
Inadequate budgeting
Insufficient technical resources

Correct Answer Logic:

Removing key requirements without business owner approval represents a fundamental governance breakdown. The business owns requirements, and descoping them without approval means the delivered system may not meet business needs. This indicates lack of oversight, poor stakeholder management, and potential project failure.

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Quantitative Reasoning QUESTION #7215

Question 3715

Nothing (i)_____ scientists more than seeing a longstanding problem in their field solved by an outsider. If you question this (ii)_____, consider the (iii)_____ reaction of paleontologists to the hypothesis by Luis Alvarez — a physicist — and Walter Alvarez — a geologist — that dinosaurs were wiped out by a large meteor impact.

Blank (i)	Blank (ii)	Blank (iii)
A. amazes	D. exposition	G. contemptuous
B. pleases	E. objurgation	H. indifferent
C. nettles	F. observation	I. insincere

Blank (i) = amazes, Blank (ii) = exposition, Blank (iii) = contemptuous
Blank (i) = pleases, Blank (ii) = objurgation, Blank (iii) = indifferent
Blank (i) = nettles, Blank (ii) = observation, Blank (iii) = contemptuous✔️
Blank (i) = nettles, Blank (ii) = exposition, Blank (iii) = insincere

Correct Answer Logic:

This three-blank question requires understanding the tone and logic of the passage.

Blank (i): The example shows paleontologists reacted badly to outsiders solving their problem. Scientists are irritated or annoyed by this — not amazed or pleased. Nettles means to irritate or annoy, which fits perfectly.

Blank (ii): The word introduces the supporting example: “if you doubt this _____”. “Exposition” means an explanation or presentation; “objurgation” means harsh scolding (too strong a word); observation means a stated claim or remark — the most neutral and fitting choice here.

Blank (iii): Since paleontologists were annoyed that outsiders solved their problem, their reaction to the Alvarez hypothesis would be contemptuous (scornful, dismissive). “Indifferent” means uncaring (doesn’t convey negativity), and “insincere” means dishonest (unrelated).

Correct Answers: Blank (i) = C (nettles), Blank (ii) = F (observation), Blank (iii) = G (contemptuous).

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Journalism / Mass Communication QUESTION #6399

Question 3716

The concept of globalization of media is discussed critically in the textbook. What is identified as a PRIMARY concern about media globalization?

That globalization makes media too affordable, reducing revenue for local publishers
That a small number of powerful transnational corporations (TNCs) are increasingly taking control of global media, threatening democracy, cultural diversity, and the public sphere✔️
That globalization only affects print media and has no impact on broadcasting
That globalization of media benefits developing countries more than developed ones

Correct Answer Logic:

The textbook presents a critical perspective on media globalization, highlighting these key concerns:

A small group of approximately 30 TNCs (transnational corporations) are working to control global media — examples include Time Warner, Disney, Bertelsmann, Viacom, and News Corporation
Economic power of these corporations is enormous: Time Warner (then the largest) had annual income of nearly $25 billion; Disney had $24 billion; News Corporation had $10 billion
Commercial values are displacing public interest values — media is increasingly driven by entertainment and light content rather than truth, accuracy, and objectivity
Threat to cultural diversity, language diversity, and regional identities
Threat to democratic functioning — media centralization concentrates information and ideological power in the hands of a few TNCs backed by powerful governments

The textbook warns: “media freedom and objectivity are declining” as commercial values take primacy.

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Statistics QUESTION #1976

Question 3717

For a frequency distribution, the first three raw moments about $x = 0$ given that $\mu_1' = 1$, $\mu_2' = 16$, $\mu_3' = -40$ are about $a=2$. The second raw moment about $x=0$ is:

$15$
$16$
$24$✔️
$18$

Correct Answer Logic:

Second raw moment about zero: $\nu_2 = \mu_2' + a^2 + 2a\mu_1' = 16 + 4 + 2(2)(1) = 24$. Alternatively using $\nu_2 = \mu_2 + \bar{x}^2 = 15 + 9 = 24$, confirming the answer.

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Physics QUESTION #1173

Question 3718

Alpha particles and electrons having the same energy — their associated De Broglie wavelengths are:

Equal
Longer than electrons (alpha has longer wavelength)
Smaller than electrons (alpha has shorter wavelength)✔️
None of these

Correct Answer Logic:

De Broglie wavelength: $\lambda = \frac{h}{\sqrt{2mE}}$. At the same kinetic energy $E$, $\lambda \propto \frac{1}{\sqrt{m}}$. Since $m_\alpha \gg m_e$ (alpha particle is ~7294 times heavier), $\lambda_\alpha \ll \lambda_e$. So alpha particles have a much shorter De Broglie wavelength than electrons at the same energy.

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General Knowledge QUESTION #4761

Question 3719

General Michael Hayden served in which capacity?

President of Chile
Defense Secretary of the United States
Commander of NATO forces in Afghanistan
Director of the CIA✔️

Correct Answer Logic:

General Michael Hayden served as Director of the Central Intelligence Agency (CIA) from 2006 to 2009, having previously served as Director of the National Security Agency.

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General Knowledge QUESTION #2634

Question 3720

What is a CHARGE CYCLE in relation to a device battery?

The time it takes to charge a battery from 0% to 50%
The number of hours a battery lasts on a single charge
One full charge and discharge of a battery✔️
The maximum voltage a battery can receive during fast charging

Correct Answer Logic:

A charge cycle is defined as one full charge and discharge of a battery. Understanding charge cycles is important because batteries have a limited number of cycles before their capacity degrades. For example, a laptop battery rated for 500 charge cycles will gradually lose capacity after those 500 full charge-discharge cycles.

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