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Agronomy QUESTION #2057

Capillary rise of water in soil is INVERSELY proportional to:

Soil water surface tension
Soil pore radius — smaller pores generate greater capillary rise height according to the capillary rise equation $h = \dfrac{2T\cos\theta}{\rho g r}$✔️
Contact angle between water and soil particles
The density of water

Correct Answer Logic:

From the capillary rise equation $h = \dfrac{2T\cos\theta}{\rho g r}$, the height of capillary rise $h$ is inversely proportional to pore radius $r$. Finer-textured soils (clay) have smaller pores and thus greater capillary rise height, though the rate of rise is slower due to higher resistance in narrow pores.

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Biology QUESTION #4234

Question 2

Which of the following is a potential symptom of chronic renal failure?

Nephritis and bacterial infection
Bone pain and fractures✔️
Impaired concentration and confusion
Muscle cramps due to electrolyte imbalance

Correct Answer Logic:

Chronic renal failure causes bone disease.

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Boilers Mechanical Engineering QUESTION #4008

Question 3

In an 'Oil-Fired' boiler, 'Atomization' of the fuel is necessary to:

Make the fuel smell better
Increase the surface area of the fuel for rapid and complete combustion✔️
Cool the fuel down
Change the color of the flame

Correct Answer Logic:

Turning liquid oil into a fine mist allows it to mix thoroughly with air.

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Urdu QUESTION #4464

Question 4

وہ جملہ جس میں ایک لفظ مثبت اور دوسرا منفی ہو تو اسے کیا کہتے ہیں۔ (What is a sentence called that contains both positive and negative words?)

صفت استعارہ
صفت تضاد✔️
صفت ابہام
ان میں کوئی نہیں۔

Correct Answer Logic:

'Sanat-e-Tazaad' (صفت تضاد) refers to the use of antonyms or opposing concepts in literature/grammar.

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Pakistan Affairs QUESTION #607

Question 5

Who is the author of the book, 'The Charismatic leader: Quaid-i-Azam M.A. Jinnah and the Creation of Pakistan'?

Hector Bolitho
Sikandar Hayat✔️
I.H. Qureshi
None of these

Correct Answer Logic:

This book was authored by the historian Sikandar Hayat .

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Basic Mathematics QUESTION #2893

Question 6

Complete the pattern: $1, 8, 27, 64, \dots$

100
125✔️
81
150

Correct Answer Logic:

The series represents cubes: $1^3, 2^3, 3^3, 4^3$. Next is $5^3 = 125$.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3347

Question 7

'Lyophilization' is a process used for:

Killing microbes with heat
Freeze-drying to preserve microbial cultures✔️
Staining slides
Testing water

Correct Answer Logic:

Water is removed under vacuum while the sample is frozen, allowing for long-term storage.

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Agronomy QUESTION #2108

Question 8

Agroecology as a scientific discipline and practice differs from conventional agronomy in that:

Agroecology advocates for higher synthetic input use to maximize ecosystem services
Agroecology applies ecological concepts and principles to the design and management of agricultural systems — emphasizing biodiversity, nutrient cycling, biological regulation of pests, and ecosystem resilience over external input-driven production, while also addressing social equity and food sovereignty dimensions✔️
Agroecology is exclusively applicable to subsistence farming systems in developing countries
Agroecology rejects all scientific research and relies entirely on traditional indigenous knowledge

Correct Answer Logic:

Agroecology (Altieri, Gliessman) integrates ecology, agronomy, and social sciences to design farming systems that mimic natural ecosystem functioning — maximizing internal biological processes (BNF, natural pest regulation, nutrient cycling through diversity) to reduce dependence on external inputs. It spans three dimensions: science (ecological principles), practice (farming methods), and movement (food systems transformation and farmer empowerment).

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Chemistry QUESTION #4378

Question 9

If $100\ kJ$ of heat is absorbed by the system and $40\ kJ$ of work is done on the system, what is the change in internal energy?

$-60\ kJ$
$+60\ kJ$
$-140\ kJ$
$+140\ kJ$✔️

Correct Answer Logic:

By the first law of thermodynamics: $\Delta U = q + w$. Heat absorbed by system: $q = +100\ kJ$. Work done ON the system: $w = +40\ kJ$. Therefore $\Delta U = 100 + 40 = +140\ kJ$.

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General Knowledge QUESTION #173

Question 10

Ismail Hania was martyred in Iran on:

July 30, 2024
July 31, 2024✔️
July 03, 2024
None of these

Correct Answer Logic:

The Hamas leader was assassinated in Tehran on July 31, 2024.

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English QUESTION #2770

Question 11

What does the phrase 'ONCE IN A BLUE MOON' mean? (Note: An idiom's meaning cannot be guessed from the individual words)

Very frequently
Every month
Very rarely✔️
During nighttime

Correct Answer Logic:

'Once in a blue moon' is an idiom meaning something that happens very rarely or infrequently. A 'blue moon' is a rare astronomical event, which is why it represents rarity. Example: 'He visits us once in a blue moon.'

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Biology QUESTION #4193

Question 12

Which of the following statement is incorrect with reference to the enzyme action?

Substrate binds with the enzyme at its active site
Non-competitive inhibitor binds the enzyme at a site distinct from that of active site
Addition of a lot of succinate do not reverse the inhibition of succinic dehydrogenase by malonate✔️
malonate is a competitive inhibitor of succinic dehydrogenase

Correct Answer Logic:

Adding excess succinate can reverse competitive inhibition by malonate, so this statement is incorrect.

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Security Measures to Maintain Law and Order QUESTION #908

Question 13

What is the "Red Zone" in airport security law and order context?

The parking lot
High-risk area near the runway✔️
The duty-free area
The waiting lounge

Correct Answer Logic:

Red Zones or Restricted High-Security zones are areas where security breaches have the most catastrophic potential for law and order.

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English QUESTION #4424

Question 14

The manager accepted the cashier's __________ for coming late.

expalanation
explaination
expinasion
explanation✔️

Correct Answer Logic:

The correct spelling is 'explanation' — a noun meaning a statement that makes something clear. All other options (expalanation, explaination, expinasion) are common misspellings of this word.

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Agronomy QUESTION #2054

Question 15

Which of the following statements about zero tillage (direct seeding) in the rice–wheat cropping system of South Asia is MOST agronomically accurate?

Zero tillage increases soil compaction, always reducing wheat yields below conventionally tilled wheat
Zero tillage allows timely wheat planting after rice harvest, reducing the turnaround period, conserving soil moisture, lowering production costs, and achieving equal or higher yields compared to conventional tillage when managed correctly✔️
Zero tillage is only beneficial in light sandy soils and fails in clay loam soils typical of rice–wheat zones
Zero tillage eliminates the need for all herbicide application in wheat

Correct Answer Logic:

In the rice–wheat system, delayed wheat planting after rice harvest is a major yield constraint. Zero tillage (using zero-till drills) reduces the turnaround period by 10–15 days, conserves residual soil moisture, reduces diesel use by 60–70%, and achieves comparable or higher yields than conventional tillage — demonstrated across millions of hectares in Pakistan, India, and Bangladesh.

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Physics and Math QUESTION #741

Question 16

Least distance of distinct vision for human eye is:

50 cm
25 cm✔️
30 cm
20 cm

Correct Answer Logic:

The near point or least distance of distinct vision for a normal human eye is 25 cm.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3386

Question 17

'Zwitterion' is a state where an amino acid has:

Only a positive charge
Only a negative charge
Both positive and negative charges (neutral net charge)✔️
No charges at all

Correct Answer Logic:

This occurs at the isoelectric point ($pI$).

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Mathematics QUESTION #962

Question 18

For a $3 \times 3$ matrix $M$, let trace$(M)$ denote the sum of all diagonal elements of $M$. Let $A$ be a $3 \times 3$ matrix such that $|A| = \dfrac{1}{2}$ and trace$(A) = 3$. If $B = \text{adj}(\text{adj}(2A))$, then the value of $|B| + \text{trace}(B)$ equals:

56
132
174
280✔️

Correct Answer Logic:

For $n=3$: $\text{adj}(\text{adj}(M)) = |M|^{n-2} M$. So $\text{adj}(\text{adj}(2A)) = |2A|^1 \cdot 2A = 8|A| \cdot 2A = 8A$. Thus $|B| = |8A| = 8^3|A| = 512 \cdot \frac{1}{2} = 256$ and $\text{trace}(B) = \text{trace}(8A) = 8\cdot3 = 24$. So $|B| + \text{trace}(B) = 256 + 24 = 280$.

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Civil Procedure QUESTION #3719

Question 19

A painter agrees to paint a portrait for $\text{\$5,000}$, with payment due 'only if I am 100% satisfied with the likeness.' The painter does a high-quality job that meets all professional standards, but the client says, 'I just don't like it,' and refuses to pay. Can the painter recover?

Yes, if a 'reasonable person' would be satisfied with the portrait.
No, because satisfaction clauses regarding art/personal taste are governed by a subjective standard.✔️
Yes, because the client is acting in bad faith.
No, because the contract was an 'illusory promise.'

Correct Answer Logic:

For contracts involving personal taste or aesthetics (like a portrait), a 'satisfaction' clause is governed by a subjective standard. As long as the dissatisfaction is honest (not necessarily reasonable), the condition is not met.

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Boilers Mechanical Engineering QUESTION #4029

Question 20

According to the Ordinance, 'Alterations' to a boiler:

Can be done by any welder
Must be approved and inspected by the authorized authority✔️
Are not allowed under any circumstances
Don't require a certificate

Correct Answer Logic:

Significant repairs or changes must maintain the original safety standards.

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