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The caliphate of Hazrat Abu Bakr (RA) lasted approximately 2 years and 3 months (632-634 CE / 11-13 AH). During this brief period, he accomplished tremendous achievements: compiled the Quran in one volume, suppressed false prophets and apostasy (Ridda Wars), sent expeditions to Syria and Iraq, and established the foundations of Islamic governance. He died at age 63 and nominated Hazrat Umar (RA) as his successor.

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Paper-I (Pharmaceutics II (Industrial and Quality Control) and Pharmaceutics III (Hospital and Community Pharmacy)) QUESTION #5733

Question 3426

In a 'Grid Layout' pharmacy design, how are the fixtures and counters typically installed?

In circles and arches
At right angles to one another✔️
In a random, unstructured flow
Only against the back wall

Correct Answer Logic:

In grid layout, fittings are at right angles in straight and parallel lines.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3620

Question 3427

'Ginger' (Adrak) belongs to the family:

Umbelliferae
Zingiberaceae✔️
Liliaceae
Solanaceae

Correct Answer Logic:

Zingiberaceae includes ginger, cardamom, and turmeric.

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Quantitative Reasoning QUESTION #8133

Question 3428

Only by ignoring years of mismanagement and inefficiency could investors believe that a new injection of capital would provide anything other than a _______ solution to the company's financial problems.
(Select the best word. Note: two words produce sentences alike in meaning — choose the most accurate.)

fleeting✔️
complete
premature
trivial

Correct Answer Logic:

The sentence implies that without fixing underlying problems, any cash injection would only work temporarily. Fleeting (lasting only a short time) is the best fit — a stopgap, not a real fix. 'Momentary' would also work (these two are the synonym pair in the original). 'Complete' is the opposite of what's implied. 'Premature' means too early, not temporary. 'Trivial' means insignificant, not temporary.

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Biology QUESTION #7265

Question 3429

Which one of the following is heterosporous?

Adiantum
Equisetum
Dryopteris
Salvinia✔️

Correct Answer Logic:

Salvinia is a heterosporous water fern that produces two types of spores: microspores (male) and megaspores (female). Adiantum, Dryopteris, and Equisetum are homosporous (produce one type of spore). Heterospory is considered an important step toward the evolution of seed habit.

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Math Physics Chemistry Biology QUESTION #7774

Question 3430

Sickle cell anemia results from what molecular abnormality?

Reduced oxygen capacity
Linkage between polypeptide chains
Single amino acid substitution in hemoglobin✔️
Viral infection of RNA viruses

Correct Answer Logic:

Sickle cell anemia is caused by a point mutation (GAG → GTG) in the β-globin gene, replacing glutamate (Glu) with valine (Val) at position 6, causing hemoglobin polymerization.

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Chemistry QUESTION #7397

Question 3431

Which one of the following orders is NOT in accordance with the stated property?

$\text{F}_2 > \text{Cl}_2 > \text{Br}_2 > \text{I}_2$: bond dissociation energy✔️
$\text{F}_2 > \text{Cl}_2 > \text{Br}_2 > \text{I}_2$: oxidising power
$\text{HI} > \text{HBr} > \text{HCl} > \text{HF}$: acidic property in water
$\text{F} > \text{Cl} > \text{Br} > \text{I}$: electronegativity

Correct Answer Logic:

Bond dissociation energies of halogens:
$\text{Cl}_2 > \text{Br}_2 > \text{F}_2 > \text{I}_2$

F₂ has an anomalously low bond energy (158 kJ/mol) due to lone pair repulsion in the small F atom, making $\text{Cl}_2$ stronger. So the order $\text{F}_2 > \text{Cl}_2$ for bond dissociation energy is incorrect.

All other options are correct: oxidising power, acid strength of HX in water, and electronegativity all follow the stated orders.

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Math Physics Chemistry Biology QUESTION #4255

Question 3432

According to Lamarck, the evolution of long necks in giraffes is explained by:

Natural selection
Genetic mutation
Survival of the fittest
Stretching of necks over generations✔️

Correct Answer Logic:

Lamarck's theory of use and disuse states that giraffes stretched their necks to reach higher leaves, and this acquired characteristic was passed to offspring over generations.

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Mathematics QUESTION #975

Question 3433

The perpendicular distance of the line $\dfrac{x-1}{2}=\dfrac{y+2}{-1}=\dfrac{z+3}{2}$ from the point $P(2,-10,1)$ is:

6
$5\sqrt{2}$
$4\sqrt{3}$
$3\sqrt{5}$✔️

Correct Answer Logic:

Direction vector $\vec{d}=(2,-1,2)$. Point on line $A=(1,-2,-3)$. $\vec{AP}=(1,-8,4)$. $|\vec{AP}|^2=1+64+16=81$. $\vec{AP}\cdot\vec{d}=2+8+8=18$. $|\vec{d}|^2=9$. Distance$^2=81-\frac{324}{9}=81-36=45$. Distance$=\sqrt{45}=3\sqrt{5}$.

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Chemistry QUESTION #5553

Question 3434

According to Molecular Orbital Theory, which statement correctly describes $Li_2^+$ and $Li_2^-$?

$Li_2^+$ is unstable and $Li_2^-$ is stable
$Li_2^+$ is stable and $Li_2^-$ is unstable
Both are stable✔️
Both are unstable

Correct Answer Logic:

$Li_2^+$ bond order = $\frac{1}{2}(3-2) = 0.5 > 0$ → stable. $Li_2^-$ bond order = $\frac{1}{2}(4-3) = 0.5 > 0$ → stable. Both species have positive bond orders and can exist as stable (though weakly bonded) species.

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Professional QUESTION #1839

Question 3435

Under Section 13(1), a civil servant shall retire from service on completing how many years of service qualifying for pension, if directed by the competent authority in the public interest?

Fifteen years
Eighteen years
Twenty years✔️
Twenty-five years

Correct Answer Logic:

Section 13(1)(i) as substituted by Ordinance No. XXXIV of 2001 provides that a civil servant shall retire on such date after completing twenty years of service qualifying for pension or other retirement benefits as the competent authority may, in public interest, direct. In the absence of such direction, retirement occurs at age sixty under clause (ii).

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Islamic Studies QUESTION #7908

Question 3436

The Muslims conquered Mecca in:

620 A.D
625 A.D
630 A.D✔️
635 A.D

Correct Answer Logic:

The Muslims conquered Mecca in 630 CE (8 AH). This conquest occurred peacefully with minimal bloodshed. The Prophet (PBUH) entered Mecca with 10,000 companions, destroyed the idols in the Kaaba, and granted general amnesty to the Meccans, demonstrating Islam's message of forgiveness and mercy.

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Accounting & Finance QUESTION #1209

Question 3437

In responsibility accounting, costs that a manager can directly influence are called:

Uncontrollable costs.
Fixed costs.
Indirect costs.
Controllable costs.✔️

Correct Answer Logic:

In responsibility accounting, controllable costs are those costs over which a manager has significant influence or authority within a given time period. A manager is held accountable only for controllable costs in their responsibility center. Uncontrollable costs are those beyond the manager's direct authority (e.g., allocated head office costs).

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Paper-I (Pharmaceutics II (Industrial and Quality Control) and Pharmaceutics III (Hospital and Community Pharmacy)) QUESTION #5728

Question 3438

Epidemiology is defined as the study of the nature and determinants of disease. Which of the following is a primary 'purpose' of epidemiology mentioned in the text?

Selling vaccines
Identifying syndromes and precursors✔️
Writing surgical reports
Cleaning hospital wards

Correct Answer Logic:

Identifying syndromes and precursors (e.g., high BP to stroke) is a core purpose.

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Boilers Mechanical Engineering QUESTION #3979

Question 3439

In a 'Fire Tube' boiler, which of the following is true regarding the heat exchange process?

Water circulates inside the tubes, surrounded by hot gases
Hot gases pass through the tubes, surrounded by water✔️
The boiler is only used for very high pressure ($>100~bar$)
There are no tubes used in the design

Correct Answer Logic:

Fire-tube boilers like the Lancashire or Locomotive types have hot gases inside tubes to heat the surrounding water.

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Chemistry QUESTION #5527

Question 3440

The Taj Mahal is gradually losing its white colour and being disfigured. This deterioration is primarily attributed to:

Global warming
Acid rain✔️
Water pollution
Soil pollution

Correct Answer Logic:

The Taj Mahal, made of white marble (calcium carbonate, $CaCO_3$), is being corroded by acid rain. Sulphur dioxide ($SO_2$) and nitrogen oxides from nearby industries react with rainwater to form sulphuric and nitric acids. These acids react with $CaCO_3$ forming calcium sulphate ($CaSO_4$), causing yellowing and pitting — known as 'Marble Cancer'.

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