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Convert ammonium to nitrate rapidly
Slow the conversion of ammonium ($NH_4^+$) to nitrate ($NO_3^-$) by inhibiting Nitrosomonas bacteria, thereby reducing leaching and denitrification losses✔️
Increase atmospheric nitrogen fixation by free-living bacteria
Chelate micronutrients to improve their plant availability

Correct Answer Logic:

Nitrification inhibitors suppress the activity of Nitrosomonas bacteria, keeping nitrogen in the ammonium form longer. Since $NH_4^+$ is adsorbed to soil colloids while $NO_3^-$ is mobile and prone to leaching and denitrification, this improves N retention and NUE.

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Urdu QUESTION #5139

Question 3525

فردوسِ بریں کس ادیب کا مشہور تاریخی ناول ہے؟

صادق الخیری
ضیا شنکر نسیم
نذیر احمد
عبدالحلیم شرر✔️

Correct Answer Logic:

فردوسِ بریں عبدالحلیم شرر کا مشہور تاریخی ناول ہے جو فرقہ باطنیہ کے موضوع پر لکھا گیا۔

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Math Physics Chemistry Biology QUESTION #4273

Question 3526

What is the function of a centromere?

To protect the ends of chromosomes
To hold sister chromatids together✔️
To carry genetic information
To initiate DNA replication

Correct Answer Logic:

The centromere is the constricted region of a chromosome that holds the two sister chromatids together until they separate during cell division.

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Math Physics Chemistry Biology QUESTION #7748

Question 3527

Malpighian tubules are excretory structures found in which organism?

Earthworm
Grasshopper✔️
Leech
Slug

Correct Answer Logic:

Malpighian tubules are the excretory organs in insects like grasshoppers. Earthworm has nephridia; leech has nephridia; slug (mollusk) has a kidney-like organ.

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General Knowledge QUESTION #7706

Question 3528

Who won the presidential elections in Turkiye in 2023?

Kemal Kılıçdaroğlu
Recep Tayyip Erdoğan✔️
Ekrem İmamoğlu
None of these

Correct Answer Logic:

Recep Tayyip Erdoğan won the Turkish presidential election in May 2023, defeating opposition candidate Kemal Kılıçdaroğlu in a runoff election. Erdoğan secured his third presidential term, extending his rule that began in 2003 as Prime Minister.

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Chemistry QUESTION #7516

Question 3529

How many litres of water must be added to 1 litre of a pH 1 HCl solution to raise the pH to 2?

0.1 L
0.9 L
2.0 L
9.0 L✔️

Correct Answer Logic:

pH 1 means $[\text{H}^+] = 0.1\ \text{M}$; pH 2 means $[\text{H}^+] = 0.01\ \text{M}$.

Using dilution formula $C_1V_1 = C_2V_2$:

$0.1 \times 1 = 0.01 \times V_2$

$V_2 = 10\ \text{L}$

Volume of water to add $= V_2 - V_1 = 10 - 1 = \mathbf{9.0\ \text{L}}$

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Urdu QUESTION #5154

Question 3530

یہ آرزو تھی تجھے گل کے روبرو کرتے، یہ شعر کس کا ہے؟

حیدر علی آتش✔️
علامہ اقبال
غالب
ان میں سے کوئی نہیں

Correct Answer Logic:

یہ شعر حیدر علی آتش کا ہے جو دہلی کے مشہور شاعر تھے۔

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Boilers Mechanical Engineering QUESTION #4056

Question 3531

'Corrosion' in a boiler can be categorized as:

External (from moisture/flue gases) and Internal (from water chemistry)✔️
Only external
Only internal
A sign of a good boiler

Correct Answer Logic:

Both sides of the metal must be protected.

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General Abilities QUESTION #7940

Question 3532

Evaluate: $\left[\dfrac{1}{216}\right]^{-2/3} + \left[\dfrac{1}{27}\right]^{-4/3}$

$\dfrac{3}{4}$✔️
$\dfrac{2}{3}$
$\dfrac{3}{9}$
$\dfrac{1}{8}$

Correct Answer Logic:

$\left[\dfrac{1}{216}\right]^{-2/3} = 216^{2/3} = (6^3)^{2/3} = 6^2 = 36$
$\left[\dfrac{1}{27}\right]^{-4/3} = 27^{4/3} = (3^3)^{4/3} = 3^4 = 81$
Sum $= 36 + 81 = 117$. Note: The answer key states $\dfrac{3}{4}$. Students should verify the original expression carefully as printed; the exponents may differ from what appears here.

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Constitutional Law QUESTION #5812

Question 3533

The President enters into an executive agreement with a foreign nation to allow for the mutual exchange of criminal records for counter-terrorism purposes. A federal statute, however, expressly prohibits the disclosure of such records to foreign entities without a court order. Which prevails?

The executive agreement, because the President has plenary power over foreign affairs.
The executive agreement, because it was entered into after the statute was enacted.
The federal statute, because an executive agreement cannot override an existing act of Congress.✔️
The federal statute, because criminal records are a matter of domestic privacy law.

Correct Answer Logic:

Executive agreements (unlike ratified treaties) do not prevail over prior conflicting federal statutes. Under the Youngstown framework, when the President acts in opposition to the expressed will of Congress, his power is at its 'lowest ebb.'

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Accounting & Finance QUESTION #6119

Question 3534

Data: Average inventory $15,000; Rate of inventory turnover 8 times; Mark-up 25%. What is the business's revenue (sales)?

$144,000
$150,000✔️
$160,000
$210,000

Correct Answer Logic:

Option B ($150,000) is correct.

COGS = 8 × $15,000 = $120,000

Mark-up 25%: Revenue = $120,000 × 1.25 = $150,000

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Urdu QUESTION #5113

Question 3535

'میں نے جب لکھنا سیکھا تھا پہلے تیرا نام لکھا تھا' یہ شعر کس کا ہے؟

غالب
محسن بھوپالی✔️
ناصر کاظمی
ان میں سے کوئی نہیں

Correct Answer Logic:

یہ مشہور شعر محسن بھوپالی کا ہے جو اردو غزل میں محبوب کے نام کی عقیدت کا اظہار ہے۔

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General Knowledge QUESTION #2604

Question 3536

An office document needs to include characters from English, Arabic, and Chinese languages simultaneously. Which encoding standard should be used?

ASCII
UTF-8✔️
RGB
Binary

Correct Answer Logic:

UTF-8 is the most prevalent encoding standard used today and supports characters from virtually all written languages in the world. ASCII is limited to English characters only and cannot represent Arabic or Chinese scripts.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3276

Question 3537

Bacteria that are 'Rod-shaped' are scientifically classified as:

Cocci
Bacilli✔️
Spirilla
Vibrios

Correct Answer Logic:

Bacilli are rod-shaped; Cocci are spherical; Spirilla are spiral.

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Urdu QUESTION #5029

Question 3538

بہادر شاہ ظفر کو کہاں قید کیا گیا تھا؟

ممبئی
دہلی
رنگون✔️
ان میں سے کوئی نہیں

Correct Answer Logic:

1857ء کی جنگِ آزادی کے بعد انگریزوں نے بہادر شاہ ظفر کو رنگون (برما) بھیج دیا جہاں 1862ء میں ان کا انتقال ہوا۔

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General Knowledge QUESTION #8861

Question 3539

In which year did Barack Hussein Obama receive the Nobel Peace Prize?

2008
2009✔️
2010
2011

Correct Answer Logic:

Obama received the Nobel Peace Prize in 2009.

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Library Sciences QUESTION #1526

Question 3540

Which type of encyclopaedia is most suitable for providing a brief, factual overview of a topic for a student beginning research on an unfamiliar subject?

A subject-specific encyclopaedia
A general encyclopaedia✔️
A biographical encyclopaedia
A technical handbook

Correct Answer Logic:

A general encyclopaedia (such as Encyclopaedia Britannica) provides broad, introductory overviews of a wide range of topics, making it most suitable for a student seeking initial background information on an unfamiliar subject before consulting more specialized sources.

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