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Incident Stabilization focuses on preventing fire spread — containing the fire to its area of origin through exposure protection so unaffected areas remain safe.

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Math Physics Chemistry Biology QUESTION #730

Question 2168

Reverse process of vector addition?

Subtraction
Division
Multiplication
None✔️

Correct Answer Logic:

The reverse process of vector addition is resolution (decomposition) of vectors into components. None of the listed options correctly describes it; the answer marked is 'None'.

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MBBS QUESTION #10224

Question 2169

In an adult, erythropoietin — the principal hormonal driver of red blood cell production — is synthesized mainly by which cells?

Bone marrow stromal cells
Hepatocytes
Peritubular interstitial cells of the kidney✔️
Splenic red pulp macrophages

Correct Answer Logic:

The peritubular interstitial cells of the renal cortex sense local tissue oxygen tension and are the principal source of erythropoietin in adults (the liver contributes more in fetal life); this is why chronic kidney disease characteristically produces anemia via reduced erythropoietin production.

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Pakistan Affairs QUESTION #308

Question 2170

What is considered as the greatest monument of Pakistan-China collaboration?

Karakoram Highway✔️
Gawadar Port
Orange Line
None of these

Correct Answer Logic:

The Karakoram Highway (KKH), also known as the Friendship Highway, is the iconic symbol of this partnership.+2

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3004

Question 2171

Which test is used to identify the type of emulsion (O/W or W/O)?

Dilution test
Dye solubility test
Conductivity test
All of these✔️

Correct Answer Logic:

All three tests are standard laboratory methods for determining emulsion type.

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Chemistry QUESTION #1441

Question 2172

In IR spectroscopy, the fingerprint region is found in the range:

4000–2500 cm$^{-1}$
2500–1500 cm$^{-1}$
1500–600 cm$^{-1}$✔️
None of these

Correct Answer Logic:

The fingerprint region in IR spectroscopy is the range from approximately 1500 to 600 cm$^{-1}$. This region contains complex, overlapping absorption bands arising from C–O, C–N, C–X stretching and various bending vibrations that are unique to each molecule — like a molecular fingerprint. The region 4000–2500 cm$^{-1}$ is the functional group region (X–H stretches).

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Social Studies QUESTION #10045

Question 2173

The subfield of anthropology that applies anthropological knowledge to solve real-world problems is known as:

Basic Anthropology
Applied Anthropology✔️
Ethnography
None of these

Correct Answer Logic:

Applied Anthropology uses anthropological methods and findings to address practical, real-world issues.

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Boilers Mechanical Engineering QUESTION #4024

Question 2174

If the 'Water Level Indicator' glass breaks, the first action of the operator should be:

Run out of the room
Close the steam and water cocks of the gauge immediately✔️
Call the police
Increase the fuel flow

Correct Answer Logic:

Safety protocols require isolating the gauge to prevent steam burns and water loss.

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Islamic Studies QUESTION #644

Question 2175

During the Second Pledge of al-'Aqaba, ________ men and two women offered an oath of allegiance to the Prophet Muhammad (ﷺ).

73✔️
63
83
None of these

Correct Answer Logic:

73 men and 2 women from Madina took the second pledge at Aqaba.

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Education QUESTION #11681

Question 2176

The National Education Commission of 1959 was established under the chairmanship of:

Fazal ur Rehman
Liaqat Ali Khan
S.M. Sharif✔️
None of these

Correct Answer Logic:

The National Education Commission 1959 (also known as the Sharif Commission) was chaired by S.M. Sharif, who was the Federal Education Secretary at the time. This commission produced Pakistan’s first comprehensive national education report after independence.

Correct Answer: C — S.M. Sharif.

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Physics QUESTION #7231

Question 2177

Planck's constant ($h$), speed of light in vacuum ($c$), and Newton's gravitational constant ($G$) are taken as fundamental constants. Which combination of these has the dimension of length?

$\sqrt{\dfrac{hc}{G}}$
$\sqrt{\dfrac{Gc}{h^{1/2}}}$
$\sqrt{\dfrac{hG}{c^3}}$✔️
$\sqrt{\dfrac{hG}{c^{5/2}}}$

Correct Answer Logic:

This is the Planck length $\ell_P = \sqrt{\dfrac{\hbar G}{c^3}}$ (with $h$ in place of $\hbar$ up to a constant).

Dimensions: $[h] = ML^2T^{-1}$, $[G] = M^{-1}L^3T^{-2}$, $[c] = LT^{-1}$

$\left[\dfrac{hG}{c^3}\right] = \dfrac{ML^2T^{-1} \cdot M^{-1}L^3T^{-2}}{L^3T^{-3}} = \dfrac{L^5T^{-3}}{L^3T^{-3}} = L^2$

$\Rightarrow \sqrt{\dfrac{hG}{c^3}} \sim [L]$ ✓

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Paper-I (Pharmaceutics II (Industrial and Quality Control) and Pharmaceutics III (Hospital and Community Pharmacy)) QUESTION #5700

Question 2178

The 'White's Method' is used in the calculation of which of the following?

Eutectic point
Isotonicity✔️
Body Surface Area
Displacement value

Correct Answer Logic:

White's method is a volume-based method used to adjust the tonicity of pharmaceutical solutions.

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Agronomy QUESTION #2022

Question 2179

Nitrification inhibitors like Nitrapyrin are used in fertilizer management to:

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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Islamic Studies QUESTION #355

Question 2180

The Ottoman Empire lasted for over:

5 Centuries
6 Centuries✔️
7 Centuries
None of these

Correct Answer Logic:

The empire existed from 1299 to 1922, spanning over six centuries.+1

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