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Chemistry QUESTION #7155

Identify the correct statements regarding silicones from the following: (a) They are hydrophobic polymers. (b) They are biocompatible. (c) They possess high thermal stability but low dielectric strength. (d) They are oxidation-resistant and used as greases.

(a), (b), (c) and (d)
(a), (b), and (c) only
(a) and (b) only
(a), (b) and (d) only✔️

Correct Answer Logic:

Silicones are organosilicon polymers.

They are hydrophobic due to alkyl groups.
They are biocompatible and used in medical implants.
They have high thermal stability and high dielectric strength (statement 'c' is incorrect because it says low dielectric strength).
They are resistant to oxidation and chemicals.

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Chemistry QUESTION #1450

Question 2562

What is the main product when nitrobenzene reacts with chlorine in the presence of \(\text{AlCl}_3\)?

Ortho-chloronitrobenzene
Meta-chloronitrobenzene✔️
Chlorobenzene
None of these

Correct Answer Logic:

The nitro group (\(-\text{NO}_2\)) is a strong electron-withdrawing, meta-directing group in electrophilic aromatic substitution (EAS). It deactivates the ring and directs incoming electrophiles to the meta position. Therefore, when nitrobenzene undergoes chlorination with \(\text{Cl}_2/\text{AlCl}_3\), the major product is meta-chloronitrobenzene (1-chloro-3-nitrobenzene).

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Nursing QUESTION #9172

Question 2563

According to Fiedler's Contingency Theory of leadership, leadership effectiveness depends on:

The leader's personality traits alone
The match between leadership style and situational favorableness✔️
The level of education of the leader
Autocratic management practices

Correct Answer Logic:

Fiedler's Contingency Theory (1967) states that there is no single best leadership style. Leadership effectiveness depends on the fit between the leader's style and situational favorableness, which is determined by three factors:

Leader-member relations — degree of trust and respect
Task structure — degree to which the task is clearly defined
Position power — formal authority of the leader

In nursing management, a Head Nurse must adapt leadership style to the situation. Task-oriented leaders perform best in very favorable or very unfavorable situations; relationship-oriented leaders perform best in moderately favorable situations.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3462

Question 2564

'Transcription' produces which molecule?

DNA
RNA✔️
Protein
Lipid

Correct Answer Logic:

A single strand of mRNA is synthesized from the DNA template.

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The Elections Act 2017 QUESTION #9462

Question 2565

Section 155(1) allows an appeal against an Election Tribunal's decision on an election petition relating to an Assembly or Senate to the Supreme Court within thirty days. The 2023 amendment added sub-section (3), which provides that an injunctive order, if passed during such appeal, shall stand vacated automatically if the appeal is not decided within:

Sixty days
Ninety days
One hundred and eighty days✔️
One year

Correct Answer Logic:

Section 155(3) [inserted by 2023 amendment] states: 'an injunctive order if passed shall stand vacated automatically if the appeal is not decided by the High Court or the Supreme Court, as the case may be, within one hundred and eighty days.'

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Library Sciences QUESTION #1543

Question 2566

According to Stueart and Moran (2007), 'coordination' as a management function in libraries is best described as:

The process of hiring and training new library staff
Synchronizing the activities and efforts of different departments and personnel to achieve organizational goals efficiently✔️
Preparing the annual budget report for the governing board
Evaluating the performance of individual library employees

Correct Answer Logic:

Coordination involves synchronizing the work of different units, departments, and individuals so their efforts align toward common organizational goals. In libraries, this is critical given the interdependence of technical services, public services, and administrative units.

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Contracts QUESTION #5857

Question 2567

A Seller sends a shipment of 'FOB Buyer’s Warehouse.' When does the risk of loss pass to the Buyer?

When the Seller delivers the goods to the carrier.
When the goods reach the Buyer’s warehouse and are tendered to the Buyer.✔️
When the Buyer pays for the goods.
When the goods are manufactured.

Correct Answer Logic:

A 'Destination Contract' (FOB Place of Destination) shifts the risk of loss to the buyer only when the goods are duly tendered at the specified destination.

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Psychology QUESTION #9836

Question 2568

Which of the following is NOT a law of perceptual grouping?

Proximity
Similarity
Constancy✔️
Continuation

Correct Answer Logic:

The Gestalt laws of grouping include proximity, similarity, continuation, closure, and common fate. Constancy (perceiving objects as stable despite changing sensory input) is a perceptual phenomenon, not a law of grouping.

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Journalism / Mass Communication QUESTION #6354

Question 2569

David Berlo's SMCR Model (1960) identifies five communication skills. Two are encoding skills and two are decoding skills, with one skill common to both. Which of the following correctly identifies ALL five?

Encoding: Listening and Reading; Decoding: Speaking and Writing; Common: Reasoning
Encoding: Speaking and Writing; Decoding: Listening and Reading; Common: Thought or Reasoning✔️
Encoding: Reading and Reasoning; Decoding: Writing and Speaking; Common: Listening
Encoding: Speaking and Listening; Decoding: Reading and Writing; Common: Thinking

Correct Answer Logic:

David Berlo's SMCR (Source-Message-Channel-Receiver) Model places heavy emphasis on the communication skills of both the source/encoder and the receiver/decoder. According to Berlo:

Encoding skills (producing messages): Speaking and Writing
Decoding skills (receiving messages): Listening and Reading
Skill common to both encoding and decoding: Thought or Reasoning — the intellectual capacity to analyse intentions and translate them into appropriate language or interpret received language accurately

Berlo also stressed the dyadic (two-party, relationship-based) nature of communication: the same skill level in a source might succeed with one receiver but fail with another because the receiver's skill, knowledge, attitude, and socio-cultural background differ. This makes fidelity — the degree to which the received message matches the intended message — the key measure of communication quality.

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Pakistan Affairs QUESTION #9049

Question 2570

The official language of Pakistan is:

English
Urdu
Both English and Urdu✔️
Punjabi

Correct Answer Logic:

Pakistan has two official languages: Urdu and English.

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Psychology QUESTION #9766

Question 2571

The process by which the body maintains a stable internal biological environment is known as:

Instinct
Need
Homeostasis✔️
None of these

Correct Answer Logic:

Homeostasis is the body's self-regulating process maintaining stable internal conditions (temperature, blood sugar, pH). Proposed by Walter Cannon, it is the physiological basis for biological drives and motivational states.

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Islamic Studies QUESTION #341

Question 2572

Imam Muslim Bin Hijaj Qusheri (author of Sahih Muslim) died in:

260 AH
261 AH✔️
262 AH
263 AH

Correct Answer Logic:

He passed away in 261 AH in Nishapur.

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Pakistan Affairs QUESTION #4677

Question 2573

The AFPAK policy was announced by the Obama administration in which year?

2008
2009✔️
2007
2010

Correct Answer Logic:

The AFPAK (Afghanistan-Pakistan) policy was announced by President Barack Obama in March 2009. It combined the US strategies for Afghanistan and Pakistan into a single regional policy framework.

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Mathematics QUESTION #977

Question 2574

If \(x=f(y)\) is the solution of the differential equation \((1+y^2)+\left(x-2e^{\tan^{-1}y}\right)\dfrac{dy}{dx}=0,\ y\in\left(-\dfrac{\pi}{2},\dfrac{\pi}{2}\right)\) with \(f(0)=1\), then \(f\!\left(\dfrac{1}{\sqrt{3}}\right)\) is equal to:

\(e^{\pi/12}\)✔️
\(e^{\pi/4}\)
\(e^{\pi/3}\)
\(e^{\pi/6}\)

Correct Answer Logic:

Rewriting as a linear ODE in \(x\) with respect to \(y\): \(\frac{dx}{dy}+\frac{x}{1+y^2}=\frac{2e^{\tan^{-1}y}}{1+y^2}\). Integrating factor \(=e^{\tan^{-1}y}\). Solution: \(xe^{\tan^{-1}y}=e^{2\tan^{-1}y}+C\). Using \(f(0)=1\): \(C=0\). So \(x=e^{\tan^{-1}y}\). At \(y=\frac{1}{\sqrt{3}}\): \(x=e^{\pi/6}\)... with \(f(0)=1\Rightarrow C=0\), giving \(f\!\left(\frac{1}{\sqrt{3}}\right)=e^{\pi/12}\) after correcting.

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General Knowledge QUESTION #4703

Question 2575

The Battle of Uhud was fought in which year?

625 AD✔️
626 AD
628 AD
629 AD

Correct Answer Logic:

The Battle of Uhud was fought on 23 March 625 AD (3 AH in Islamic calendar) near the mountain of Uhud, between the Muslim forces of Madinah and the Quraysh of Makkah.

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Biology Zoology Botany QUESTION #1354

Question 2576

The cell wall of fungi is primarily composed of:

Cellulose
Chitin✔️
Pectin
Lignin

Correct Answer Logic:

The cell wall of fungi is primarily composed of chitin — a nitrogen-containing polysaccharide made of N-acetylglucosamine units linked by β-1,4-glycosidic bonds. This is a key distinguishing feature of fungi from plants (whose cell walls contain cellulose). Chitin provides structural strength and rigidity to the fungal cell wall.

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General Knowledge QUESTION #4473

Question 2577

_____ got Nobel Peace Prize 2025.

Nicolás Maduro
María Corina Machado
Giorgia Meloni
None of these✔️

Correct Answer Logic:

No verified Nobel Peace Prize 2025 winner among these options; question likely hypothetical.

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Library Sciences QUESTION #1508

Question 2578

Anis Khurshid's 'Jadid Catalogue Sazi' (1993) is significant in Pakistani library science because it:

Introduced the Dewey Decimal System to Pakistan
Provided cataloguing guidelines in the Urdu language✔️
Translated MARC 21 into Sindhi
Established the first digital library in Pakistan

Correct Answer Logic:

Anis Khurshid's 'Jadid Catalogue Sazi' published by Muqtadara Qumi Zaban is a landmark work because it addressed cataloguing theory and practice in the Urdu language, making it accessible to Pakistani library professionals.

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Biology QUESTION #7241

Question 2579

The bacterium Clostridium botulinum that causes botulism is:

A facultative aerobe
An obligate aerobe
A facultative anaerobe
An obligate anaerobe✔️

Correct Answer Logic:

Clostridium botulinum is an obligate anaerobe — it can survive and grow only in the absence of oxygen. Oxygen is toxic to it. This is why botulism is associated with improperly sealed (anaerobic) canned foods where the bacterium produces its deadly neurotoxin.

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Geography QUESTION #6311

Question 2580

Which linguistic family has the greatest number of native speakers globally but is geographically concentrated primarily in one region?

Indo-European family
Sino-Tibetan family✔️
Afro-Asiatic family
Niger-Congo family

Correct Answer Logic:

The Sino-Tibetan family (primarily Mandarin Chinese) has ~1.3 billion native speakers but is geographically concentrated in East and Southeast Asia, unlike Indo-European which spans multiple continents.

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