Reading Mode - Questions

Chemistry QUESTION #4368

Poly vinyl chloride (PVC) is the type of:

Homopolymer
Thermosetting polymer
Thermoplastic polymer✔️
Copolymer

Correct Answer Logic:

PVC is formed by addition polymerization of vinyl chloride ($CH_2=CHCl$) monomers. It is a thermoplastic polymer — it softens on heating and re-hardens on cooling, and can be reshaped.

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Statistics QUESTION #1989

Question 4582

The number of permutations of 3 letters chosen from 4 distinct letters A, B, C, D is:

$4$
$12$
$24$✔️
$64$

Correct Answer Logic:

The number of permutations $= P(4,3) = \dfrac{4!}{(4-3)!} = \dfrac{24}{1} = 24$. This counts ordered arrangements. The number of combinations would be $C(4,3)=4$, but permutations account for all orderings of each combination (each set of 3 has $3! = 6$ arrangements, so $4 \times 6 = 24$).

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Journalism / Mass Communication QUESTION #6394

Question 4583

The Schramm-Osgood Interactive Model has a key drawback identified in the textbook. What is it?

It lacks any concept of feedback
It does not include the concept of a message
The model only accounts for bilateral communication between two parties and cannot model the complex, multi-source communication patterns of mass media✔️
It is identical to Shannon-Weaver and provides no new insights

Correct Answer Logic:

The Schramm-Osgood Interactive Model (1954) was a major improvement over Shannon-Weaver: it added the field of experience, made encoding/decoding simultaneous and reciprocal, incorporated feedback, and acknowledged that meaning is interpreted, not merely decoded. However, the textbook explicitly identifies its key limitation: “Schramm's model, though less linear, still accounts for only bilateral communication between two parties. The complex, multiple levels of communication between several sources is beyond this model.” In mass communication, one source (a broadcaster) communicates simultaneously with millions of receivers with varying fields of experience, and feedback is delayed and indirect (ratings, letters, viewer surveys). The dyadic (two-party) assumption of the Schramm-Osgood model does not capture this complexity adequately, which is why later mass communication models were needed.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3419

Question 4584

'Rickets' in children and 'Osteomalacia' in adults are due to deficiency of:

Vitamin C
Vitamin D and Calcium✔️
Iron
Vitamin B1

Correct Answer Logic:

Leads to softening and weakening of the bones.

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Maths QUESTION #4514

Question 4585

What is the value of $3^0$?

$0$
$1$✔️
$3$
Undefined

Correct Answer Logic:

Any non-zero number raised to power $0$ equals $1$. Therefore, $3^0 = 1$

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Chemistry QUESTION #7793

Question 4586

The standard hydrogen electrode (SHE) is assigned a potential of:

-1 V
0 V✔️
1 V
2 V

Correct Answer Logic:

By convention, SHE potential is defined as 0 V at all temperatures, with H⁺ (1 M) | H₂ (1 atm) | Pt.

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General Knowledge QUESTION #4471

Question 4587

_____ is the author of “Essay on Population (1798)”.

Thomas Malthus✔️
Ester Boserup
Garret Hardin
None of these

Correct Answer Logic:

Thomas Malthus authored 'An Essay on the Principle of Population' in 1798.

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English Literature QUESTION #716

Question 4588

Hester Prynne's daughter in "The Scarlet Letter" is named:

Ruth
Pearl✔️
Mary
Sarah

Correct Answer Logic:

Pearl is the living embodiment of the scarlet letter, a constant reminder of Hester's sin and her spirit.

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Pakistan Affairs QUESTION #153

Question 4589

What warning did Jinnah give the British PM in 1919 regarding the Sultan of Turkey?

Great Britain should establish direct rule over Turkey
Reducing the Sultan's status would cause a colossal and abiding reaction in India✔️
The Muslim world would support British policies
None of these

Correct Answer Logic:

This was part of the memorandum supporting the Khilafat cause to protect the Caliphate.

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Verbal Reasoning QUESTION #8086

Question 4590

In 1950, if the printing cost per newspaper was $0.05, what would have been the total cost of printing the average daily circulation?

[Note: From the graph, average daily circulation in 1950 was 520,000 newspapers]

$32,500
$26,000✔️
$23,500
$22,000

Correct Answer Logic:

Total cost = (number of newspapers) × (cost per newspaper)

Total cost $= 520{,}000 \times 0.05$

$= 520{,}000 \times \frac{5}{100} = 520{,}000 \times \frac{1}{20} = \frac{520{,}000}{20} = 26{,}000$

Therefore, the total cost would be $26,000.

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FIA Act QUESTION #9984

Question 4591

Rules may also provide for rewards to be given to:

Only Agency members
Members of the Agency or members of the public for commendable service✔️
Only Federal Ministers
Only informants outside Pakistan

Correct Answer Logic:

Rules may cover rewards to Agency members or the public for commendable services.

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General Knowledge QUESTION #8929

Question 4592

The word 'Tsunami' originates from which language?

English
Japanese✔️
Urdu
None of these

Correct Answer Logic:

Tsunami is a Japanese word.

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Civil Engineering QUESTION #6598

Question 4593

In a one-way slab system, the structural load transfer occurs primarily in the:

Short direction✔️
Long direction
Either short or long direction
Both short and long directions equally

Correct Answer Logic:

A one-way slab is designed so that bending and load transfer occur predominantly in the short direction (spanning direction), where $L_{long}/L_{short} \geq 2$. The short-span strips carry essentially all the load.

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Math (Module-1) QUESTION #5386

Question 4594

An object travels at a constant speed of $20$ meters per second. What is the total distance, in meters, that the object will cover in $14$ seconds?

$6$
$34$
$200$
$280$✔️

Correct Answer Logic:

Distance = speed $\times$ time. So, $20 \text{ m/s} \times 14 \text{ s} = 280$ meters.

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Mathematics QUESTION #1331

Question 4595

For the center of mass of a surface of revolution generated by rotating a curve about the $x$-axis, the $x$-coordinate of the center of mass is given by:

$\bar{x}=\dfrac{\int x\,dS}{\int dS}$ where $dS$ is the surface area element✔️
$\bar{x}=\dfrac{\int x\,dV}{\int dV}$
$\bar{x}=\dfrac{\int x\,dA}{\int dA}$ (area)
$\bar{x}=\dfrac{\int x\,ds}{\int ds}$ (arc length only)

Correct Answer Logic:

For a uniform surface of revolution, the center of mass lies on the axis of revolution. The $x$-coordinate is $\bar{x}=\dfrac{\int x\,dS}{\int dS}$ where $dS=2\pi y\,ds$ is the element of surface area (Pappus's theorem setup). Integration is along the generating curve.

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Education QUESTION #6710

Question 4596

A teacher designs performance objectives for a creative writing unit. Which objective BEST balances measurability with creative freedom?

Students will write creatively
Students will create an original story incorporating at least three literary devices from the provided list✔️
Students will enjoy creative writing
Students will improve their writing skills

Correct Answer Logic:

Effective performance objectives are specific and measurable yet allow appropriate freedom. This objective has clear criteria (original story, three literary devices, specified list) while permitting creative variation in implementation. It's assessable without being overly prescriptive.

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Electronics Engineering QUESTION #11743

Question 4597

When performing a hipot (dielectric withstand) test on a completed PCB assembly, the test voltage is applied between:

All circuit nodes and chassis/earth ground simultaneously
Primary and secondary circuits (or mains to safety ground) while all other points are connected together✔️
Individual components and their reference pins
The PCB surface and the copper ground plane through the substrate

Correct Answer Logic:

Hipot testing applies elevated voltage (typically 1.5–3 kV AC or 2–4 kV DC for mains equipment) between primary mains circuits and secondary/chassis earth (or between isolated circuits) to verify that the insulation can withstand overvoltage without breakdown. All primary conductors are connected together, and all secondary/earth conductors are connected together, maximising stress across the insulation barrier.

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Psychology QUESTION #9866

Question 4598

Studies on maturation and learning have indicated:

That environmental stimulation may affect growth
That some behaviour may affect normal development
That the two follow independent courses
Both that environmental stimulation may affect growth and that some behaviour may affect normal development✔️

Correct Answer Logic:

Research reveals maturation and learning are intertwined: (a) environmental stimulation affects physical and neural growth, and (b) behaviour patterns influence normal development. The two do NOT follow completely independent courses — both (a) and (b) are supported.

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