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Chemistry QUESTION #7359

The smallest wavelength among spectral series of hydrogen occurs in which series?

Lyman series✔️
Balmer series
Paschen series
Brackett series

Correct Answer Logic:

Concept: Wavelength $\propto \dfrac{1}{\Delta E}$. Smallest wavelength = largest energy transition.

The Lyman series ($n \geq 2 \to n=1$) involves transitions to the lowest energy level, releasing the most energy. The series limit of Lyman series gives the shortest possible wavelength (91.2 nm in UV region).

Order of wavelengths: Lyman < Balmer < Paschen < Brackett

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3531

Question 3202

The term 'Biological Source' includes:

The Genus and Species only
The Genus, Species, Family, and Part used✔️
The price of the drug
The name of the farmer

Correct Answer Logic:

A complete biological source specifies the exact identity and the part of the plant.

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Security Measures to Maintain Law and Order QUESTION #949

Question 3203

What is 'Cyber Security' in the context of airport order?

Locking the server room
Protecting digital systems and networks✔️
Fixing broken computers
Monitoring staff emails

Correct Answer Logic:

Protecting navigation, communication, and security systems from digital attacks is vital for maintaining airport order.

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Accounting & Finance QUESTION #6145

Question 3204

Draft statement of financial position: Ordinary share capital $900,000; Share premium $80,000; General reserve $96,000; Retained earnings (opening) $230,000; Profit for year $145,000. What is the maximum dividend the company can declare?

$145,000
$375,000
$471,000✔️
$551,000

Correct Answer Logic:

Option C ($471,000) is correct.

Dividends can only be paid from distributable (revenue) reserves:

Retained earnings: $230,000
Profit for year: $145,000
General reserve: $96,000

Total = $471,000

Share premium ($80,000) is a capital reserve — not distributable.

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

Question 3205

'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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Civil Engineering QUESTION #6570

Question 3206

The type of brick bond predominantly used in Government Sector construction projects in Pakistan is:

Flemish Bond
Double Flemish Bond
English Bond✔️
Fletcher Bond

Correct Answer Logic:

English Bond alternates courses of headers and stretchers and is widely specified in Government projects in Pakistan for its high strength and proven durability.

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Biology Zoology Botany QUESTION #1353

Question 3207

All of the following statements regarding 'lung ventilation' and 'gas exchange' in birds are TRUE EXCEPT:

Abdominal and thoracic air sacs are compressed by body muscles to move air through the respiratory system
Gas exchange occurs in blind-ending sacs called alveoli✔️
Two respiratory cycles are required to move a volume of air through the respiratory system
None of these

Correct Answer Logic:

Statement (B) is FALSE for birds. In birds, gas exchange does NOT occur in blind-ending alveoli (as in mammals) but in microscopic tubes called parabronchi, where air flows unidirectionally. This allows continuous, highly efficient gas exchange in both inhalation and exhalation. Statements (A) and (C) are true — air sacs act as bellows and two breath cycles are needed to move air through the entire system.

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Physics QUESTION #7842

Question 3208

Direction of induced current is given by:

Ampere's law
Faraday's law
Lenz's law✔️
Ohm's law

Correct Answer Logic:

Lenz's law: induced current opposes the change in flux.

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Civil Procedure QUESTION #3727

Question 3209

Two cars collide at an intersection. Witness A says Car 1 ran the red light. Witness B says Car 2 ran the red light. Both witnesses are credible. The jury is perfectly split $\text{50/50}$ on who was at fault. If the plaintiff (Driver of Car 1) has the burden of proof, who wins?

The plaintiff.
The defendant.✔️
Neither; it's a mistrial.
They share the damages equally.

Correct Answer Logic:

The plaintiff bears the burden of proof by a 'preponderance of the evidence' (more likely than not, or $>50\%$). If the evidence is in equipoise (exactly $50/50$), the party with the burden of proof loses.

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Reading and Writing (Module-1) QUESTION #5353

Question 3210

Text 1: Graphic novels are gaining popularity, but they shouldn't be deemed literature. Literature, by definition, uses only language to tell stories, whereas graphic novels rely on images and use text minimally. Text 2: Graphic novels use both text and imagery to tell a story. Without the dialogue, the images wouldn't be fully understood; the meaning comes from the blend of both. Furthermore, the writing in many graphic novels is as high-quality as standard prose. Based on the texts, how would the author of Text 2 most likely respond to the overall argument presented in Text 1?

By asserting that language plays a more important role in graphic novels than the author of Text 1 recognizes✔️
By acknowledging that the author of Text 1 has identified a flaw that is common to all graphic novels
By suggesting that the story lines of certain graphic novels are more difficult to understand than the author of Text 1 claims
By agreeing with the author of Text 1 that most graphic novels aren't as well crafted as most literary works are

Correct Answer Logic:

Text 2 argues that language is essential and often high-quality in graphic novels, directly countering Text 1's claim that they use language only sparingly.

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Verbal Reasoning QUESTION #8162

Question 3211

A humanities course reading list has 10 books total: 4 are biographies and 6 are novels. Each student must choose 4 books, with at least 2 biographies required. How many valid 4-book selections are possible?

$90$
$115$✔️
$130$
$144$

Correct Answer Logic:

We need to count selections of 4 books that include 2 or more biographies (from 4 biographies and 6 novels).

Case 1 — Exactly 2 biographies + 2 novels:
$\binom{4}{2} \times \binom{6}{2} = 6 \times 15 = 90$

Case 2 — Exactly 3 biographies + 1 novel:
$\binom{4}{3} \times \binom{6}{1} = 4 \times 6 = 24$

Case 3 — Exactly 4 biographies + 0 novels:
$\binom{4}{4} \times \binom{6}{0} = 1 \times 1 = 1$

Total $= 90 + 24 + 1 = \mathbf{115}$.

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Electrical Engineering QUESTION #2187

Question 3212

A long straight conductor carries $I = 10\,\text{A}$. The magnetic flux density $B$ at a perpendicular distance $r = 2\,\text{cm}$ from it (in free space) is:

$100\,\mu\text{T}$✔️
$50\,\mu\text{T}$
$200\,\mu\text{T}$
$25\,\mu\text{T}$

Correct Answer Logic:

$B = \frac{\mu_0 I}{2\pi r} = \frac{4\pi\times10^{-7}\times10}{2\pi\times0.02} = \frac{4\times10^{-6}}{0.04\pi}\times\pi = \frac{4\times10^{-6}}{0.04} = 10^{-4}\,\text{T} = 100\,\mu\text{T}$.

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MBBS QUESTION #10214

Question 3213

The thymus, essential for maturation of T-lymphocytes, is relatively largest (in proportion to body size) at which stage of life?

At puberty
In infancy and childhood, before puberty✔️
In old age
Only during fetal life, being absent after birth

Correct Answer Logic:

The thymus is proportionally largest in infancy and childhood, when T-cell education and 'seeding' of the peripheral immune system are most active; it undergoes progressive involution and replacement by fatty tissue after puberty, though some function persists into adulthood.

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Security Measures to Maintain Law and Order QUESTION #914

Question 3214

The legal definition of an "Airport" as per Section 2 includes:

Only the terminal
All areas defined in the Civil Aviation Ordinance✔️
Only the runway
Only the control tower

Correct Answer Logic:

Section 2(b) refers to the definition provided in the Civil Aviation Ordinance, 1960.

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Nursing QUESTION #9126

Question 3215

During the third stage of labor, a nurse notices the uterus becomes firm, globular, and rises in the abdomen; the umbilical cord lengthens at the vulva. This BEST describes which sign of placental separation?

Calkin's sign
Küstner's sign✔️
Schultze mechanism sign
Brandt-Andrews sign

Correct Answer Logic:

Signs of placental separation are critical knowledge for midwives. The question describes Küstner's sign:

When the suprapubic area is pressed, if the cord does not retract back = placenta has separated.

However, the combination described — firm/globular uterus + cord lengthening + uterus rising — collectively represents classic signs of placental separation. Among the options:

Küstner's sign: Cord does not retract when suprapubic pressure applied = separated.
Calkin's sign: Uterus becomes firm, globular, and rises above umbilicus.
Schultze mechanism: Placenta separates centrally (fetal surface first) — more common (~80%).
Duncan mechanism: Separates from edges first — maternal surface presents first.

The specific sign of cord lengthening + uterine globular rise together is Küstner's sign as the primary distinguishing clinical sign taught in Pakistani nursing exams.

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General Knowledge QUESTION #4747

Question 3216

The organization HAMAS was founded by which of the following individuals?

Yasser Arafat
Ismail Haniyeh
Khalid Meshaal
Sheikh Ahmed Yassin and associates✔️

Correct Answer Logic:

HAMAS was founded in 1987 by Sheikh Ahmed Yassin, Abdel Aziz al-Rantissi, and Mohammad Taha at the start of the First Intifada as an offshoot of the Muslim Brotherhood.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3318

Question 3217

'Nonspecific Immunity' (Innate) includes all the following EXCEPT:

Skin barrier
Stomach acid
Antibody production✔️
Phagocytosis

Correct Answer Logic:

Antibody production is part of 'Specific' or 'Adaptive' immunity.

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Home Economics QUESTION #6294

Question 3218

A 'Result Demonstration' is used in extension to prove that:

The villagers should move to the city
A new practice is superior to the old one under local conditions✔️
The extension worker is a good speaker
The government has a lot of money

Correct Answer Logic:

Result demonstrations show the 'proof' of a new method by showing the end result (e.g., higher crop yield).

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The Elections Act 2017 QUESTION #9416

Question 3219

Section 20(3) of the Elections Act 2017 requires that variation in population of constituencies shall not ordinarily exceed ten percent. The 2023 amendment added a proviso clarifying that:

Strict adherence to existing district boundaries is always mandatory
It shall not be necessary to strictly adhere to existing district boundaries in exceptional cases✔️
The ten percent limit may be extended to fifteen percent by Commission order
Population variation must be measured against the latest census in all cases

Correct Answer Logic:

The proviso inserted in Section 20(3) by the 2023 amendment states it 'shall not be necessary to strictly adhere to the existing district boundaries in exceptional cases', providing flexibility in delimitation.

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Logical Reasoning QUESTION #3948

Question 3220

Interestingly, it often proves more challenging to compose a narrative about the _____ than it is to describe the _____ and the unfamiliar.

specific...foreign✔️
abstract...prosaic
commonplace...exotic
simple...routine

Correct Answer Logic:

2

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