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Hazrat Abu Bakr (RA) was the sole companion of the Prophet (PBUH) during the migration (Hijrah) to Medina in 622 CE. They hid in the Cave of Thawr for three days while Quraish searched for them. This companionship demonstrated Abu Bakr's unwavering faith and loyalty, earning him the title 'As-Siddiq' (the truthful).

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3049

Question 106

What is the correction for 'Eutectic Mixtures' in powders?

Adding an adsorbent like magnesium carbonate✔️
Adding water
Heating the mixture
Sifting

Correct Answer Logic:

Adsorbents prevent the liquefied mixture from turning the whole powder damp.

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Chemistry QUESTION #1450

Question 107

What is the main product when nitrobenzene reacts with chlorine in the presence of \(\text{AlCl}_3\)?

Ortho-chloronitrobenzene
Meta-chloronitrobenzene✔️
Chlorobenzene
None of these

Correct Answer Logic:

The nitro group (\(-\text{NO}_2\)) is a strong electron-withdrawing, meta-directing group in electrophilic aromatic substitution (EAS). It deactivates the ring and directs incoming electrophiles to the meta position. Therefore, when nitrobenzene undergoes chlorination with \(\text{Cl}_2/\text{AlCl}_3\), the major product is meta-chloronitrobenzene (1-chloro-3-nitrobenzene).

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Biology Zoology Botany QUESTION #1356

Question 108

Which of the following is the dominant generation in the life cycle of Pteridophytes?

Sporophyte✔️
Gametophyte
Seedling
Embryo

Correct Answer Logic:

In pteridophytes (ferns and allies), the sporophyte generation (diploid, 2n) is the dominant, independent, and conspicuous phase — the familiar leafy fern plant. The gametophyte (haploid, n) is a small, inconspicuous, short-lived prothallus. This contrasts with bryophytes where the gametophyte is dominant, and represents an evolutionary advancement.

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General Knowledge QUESTION #4765

Question 109

Who served as President of the World Bank in 2009?

Robert Bruce Zoellick✔️
Robert Bruce Gate
Robert Bruce Lohaf
Bill Gates

Correct Answer Logic:

Robert Zoellick served as the 11th President of the World Bank Group from 2007 to 2012, succeeding Paul Wolfowitz.

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Boilers Mechanical Engineering QUESTION #2510

Question 110

For a state of plane stress \((\sigma_x, \sigma_y, \tau_{xy})\), the maximum in-plane shear stress is:

\(\tau_{max} = \sqrt{\left(\frac{\sigma_x - \sigma_y}{2}\right)^2 + \tau_{xy}^2}\)✔️
\(\tau_{max} = \frac{\sigma_x + \sigma_y}{2}\)
\(\tau_{max} = \sigma_x - \sigma_y\)
\(\tau_{max} = \tau_{xy}\)

Correct Answer Logic:

The maximum in-plane shear stress equals the radius of Mohr's circle: \(\tau_{max}=\sqrt{\left(\frac{\sigma_x-\sigma_y}{2}\right)^2+\tau_{xy}^2}\).

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Civil / Architecture QUESTION #2368

Question 111

In the context of Building Management Systems (BMS) for integrated building design, SCADA refers to:

Structural Control and Design Automation — a software for automated RC design
Supervisory Control and Data Acquisition — a system for real-time monitoring and control of building services (HVAC, electrical, fire, security)✔️
Sustainable Construction and Design Assessment — a green building rating tool
System for Computer-Aided Drafting and Architecture — a CAD platform for BIM

Correct Answer Logic:

SCADA (Supervisory Control and Data Acquisition) is a control system architecture used in BMS that enables real-time monitoring, data acquisition, and supervisory control of building systems including HVAC, lighting, electrical distribution, fire suppression, and security. It typically consists of field devices (sensors, actuators), PLCs/RTUs, a communication network, and an HMI (Human-Machine Interface) for operators.

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Mathematics QUESTION #7484

Question 112

Let N be the set of natural numbers and two functions f and g be defined as \(f,g: \mathbb{N} \to \mathbb{N}\) such that \(f(n) = \begin{cases} \frac{n+1}{2} & \text{if } n \text{ is odd} \\ \frac{n}{2} & \text{if } n \text{ is even} \end{cases}\) and \(g(n) = n - (-1)^n\). Then fog is:

onto but not one-one
one-one but not onto
both one-one and onto✔️
neither one-one nor onto

Correct Answer Logic:

First, \(g(n) = n - (-1)^n = \begin{cases} n-1 & \text{if } n \text{ is odd} \\ n+1 & \text{if } n \text{ is even} \end{cases}\). For odd n, \(g(n) = n-1\) is even, and for even n, \(g(n) = n+1\) is odd. Now \((f \circ g)(n) = f(g(n))\). If n is odd: \(g(n) = n-1\) (even), so \(f(g(n)) = \frac{n-1}{2}\). If n is even: \(g(n) = n+1\) (odd), so \(f(g(n)) = \frac{(n+1)+1}{2} = \frac{n+2}{2}\). For injectivity: if \((f \circ g)(n_1) = (f \circ g)(n_2)\), we need to show \(n_1 = n_2\). If both are odd: \(\frac{n_1-1}{2} = \frac{n_2-1}{2}\), so \(n_1 = n_2\). If both even: \(\frac{n_1+2}{2} = \frac{n_2+2}{2}\), so \(n_1 = n_2\). If one odd and one even: \(\frac{n_1-1}{2} = \frac{n_2+2}{2}\), giving \(n_1 = n_2+3\), which contradicts parity. So fog is injective. For surjectivity: any \(m \in \mathbb{N}\) can be written as \(m = \frac{2m-1}{2}\) (from odd \(n=2m-1\)) or \(m = \frac{2m+2}{2}\) (from even \(n=2m-2\)). So fog is surjective. Thus fog is bijective.

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Ability / HR / Governance / Special Education QUESTION #1922

Question 113

Under Rule 14(2) no Division shall consult the Attorney General except through which Division?

The Establishment Division
The Cabinet Division
The Law and Justice Division in accordance with its prescribed procedure✔️
The Finance Division

Correct Answer Logic:

Rule 14(2) categorically states that no Division shall consult the Attorney General except through the Law and Justice Division and in accordance with the procedure laid down by that Division — subject only to the specific arbitration exception.

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Biology QUESTION #4275

Question 114

The first consequence of lymphatic blockage in tissues is:

Deficiency of oxygen
Loss of nerve signals
Drop in blood pressure
Excess fluid accumulation in tissue✔️

Correct Answer Logic:

When lymphatic vessels are blocked, lymph cannot drain from tissues, leading to accumulation of interstitial fluid, causing edema (swelling).

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Biology QUESTION #7736

Question 115

The acidity of the female urethra is neutralized by secretions from which male gland?

Cowper's gland
Prostate gland✔️
Seminal vesicle
Vas deferens

Correct Answer Logic:

Prostate gland secretes a slightly alkaline fluid (pH ~7.5) that neutralizes acidic vaginal pH and urethral acidity, protecting sperm. Cowper's gland secretes pre-ejaculate; seminal vesicle provides fructose.

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Planning QUESTION #4922

Question 116

Which surveying method is most appropriate for establishing control points over large areas?

Chain surveying
Compass surveying
Triangulation surveying✔️
Plane table surveying

Correct Answer Logic:

Triangulation surveying is most suitable for large areas because it provides high accuracy through a network of triangles, using trigonometric calculations to establish precise control points.

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Chemistry QUESTION #459

Question 117

CaO forms fertilize slag by reacting with

P?O?
Fe?O?
Silica✔️
FO

Correct Answer Logic:

CaO + SiO? ? CaSiO? (slag)

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Agronomy QUESTION #2044

Question 118

In the context of integrated nutrient management (INM), the concept of 'nutrient budget' refers to:

The financial cost of purchasing fertilizers per cropping season
Quantitative accounting of all nutrient inputs (fertilizers, manures, BNF, irrigation water, atmospheric deposition) versus nutrient outputs (crop removal, leaching, volatilization, runoff) to determine the net soil nutrient balance✔️
The ratio of organic to inorganic fertilizer inputs on a farm
The recommended fertilizer dose published in government guidelines

Correct Answer Logic:

A nutrient budget is a mass balance: Inputs (fertilizers + manures + BNF + deposition + irrigation) − Outputs (grain + straw removal + leaching + volatilization + runoff) = Net balance. A negative balance indicates soil nutrient mining; a positive balance may indicate over-application risk. INM aims to achieve a balanced or slightly positive budget.

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Civil / Architecture QUESTION #2362

Question 119

In earthquake engineering, the ductility demand \(\mu\) of a structure is defined as the ratio of the maximum displacement \(\Delta_{max}\) to the yield displacement \(\Delta_y\). For a structure with a force reduction factor \(R = 6\) designed using the equal energy principle (applicable for intermediate period structures), the relationship between \(R\) and \(\mu\) is approximately:

\(R = \mu\)
\(R = \sqrt{2\mu - 1}\)✔️
\(R = \mu^2\)
\(R = 2\mu\)

Correct Answer Logic:

The equal energy principle (Newmark-Hall approach for intermediate periods \(0.1\,\text{s} < T < T_s\)) gives \(R = \sqrt{2\mu - 1}\). For long-period structures (equal displacement principle): \(R = \mu\). For short-period structures (equal acceleration): \(R = 1\) regardless of ductility. Understanding which principle applies determines the inelastic displacement demand in seismic design.

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Geography QUESTION #6340

Question 120

In urban geography, 'gentrification' is best defined as:

Government-led urban renewal and slum clearance
Private reinvestment in deteriorating neighborhoods leading to displacement of lower-income residents✔️
Suburbanization of middle-class populations
Construction of luxury high-rise apartments

Correct Answer Logic:

Gentrification involves private capital reinvestment rehabilitating deteriorating inner-city neighborhoods, increasing property values, attracting higher-income residents, and displacing original lower-income inhabitants through rising rents and property taxes.

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