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Chemistry QUESTION #1414

Which of the following does NOT have the ground-state configuration $1s^2 2s^2 2p^6$?

Ne
Na$^+$
Cl$^-$✔️
None of these

Correct Answer Logic:

Ne has 10 electrons: $1s^2 2s^2 2p^6$ ✓. Na$^+$ has lost one electron from Na (11e$^-$), giving 10e$^-$: $1s^2 2s^2 2p^6$ ✓. Cl$^-$ has gained one electron from Cl (17e$^-$), giving 18e$^-$: $1s^2 2s^2 2p^6 3s^2 3p^6$ — this is the Ar configuration, NOT $1s^2 2s^2 2p^6$. So Cl$^-$ does NOT have this configuration.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #2957

Question 1882

What is the primary purpose of adding a 'Humectant' to a topical cream formulation?

To prevent the growth of bacteria
To prevent the preparation from drying out✔️
To increase the viscosity of the oil phase
To act as a primary emulsifier

Correct Answer Logic:

Humectants like glycerin or propylene glycol are added to prevent water loss from the preparation.

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Others section QUESTION #4722

Question 1883

Han Myung-sook became the first female Prime Minister of which country?

South Korea✔️
North Korea
Vietnam
Japan

Correct Answer Logic:

Han Myung-sook served as Prime Minister of South Korea from April to November 2006, becoming the country's first female Prime Minister.

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Professional QUESTION #1906

Question 1884

On which exact date did the Rules of Business 1973 come into force?

23rd March 1973
14th August 1973✔️
1st July 1973
25th December 1973

Correct Answer Logic:

Rule 1(2) specifically states that the Rules of Business 1973 shall come into force on the fourteenth day of August 1973.

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Biology QUESTION #4266

Question 1885

Which part of the brain controls transition between sleeping and wakefulness?

Medulla oblongata
Cerebellum
Cerebrum
Pons✔️

Correct Answer Logic:

The Pons contains sleep centers and plays a key role in regulating the transition between sleep and wakefulness, including REM sleep.

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Biology QUESTION #4170

Question 1886

Which of the following hormones in the body of animal is lipid-based in nature?

Insulin
FSH
Oxytocin
Aldosterone✔️

Correct Answer Logic:

Aldosterone is a steroid hormone (lipid-based), while insulin, FSH, and oxytocin are protein/peptide hormones.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3643

Question 1887

Which chemical reagent is used to detect the presence of 'Starch'?

Iodine solution✔️
Benedict's reagent
Mayer's reagent
Millon's reagent

Correct Answer Logic:

Iodine turns blue-black in the presence of starch.

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Architecture QUESTION #2338

Question 1888

In airport terminal design, the distance beyond which assisted passenger movement (travellators, light rail, or buses) is required is:

Over 100 m
Over 200 m
Over 300–400 m✔️
Over 500 m

Correct Answer Logic:

The Architects' Handbook states travel distances of up to 300–400 m are acceptable on foot. Beyond that, assisted movement is required: travellators for 300–1000 m, light rail systems for 1–3 km, and buses for complex multi-stop journeys such as terminal to satellite via the apron.

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Pakistan Affairs QUESTION #156

Question 1889

What did the Nehru Report state regarding the demand for independence?

Complete independence was the primary demand
Dominion Status was the minimum acceptable demand✔️
It advocated for full autonomy within the Empire
Indian leaders were satisfied with British rule

Correct Answer Logic:

The 1928 Nehru Report settled on Dominion Status as a compromise between different political factions.

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Mechanical Engineering QUESTION #2492

Question 1890

For an open kinematic chain with $n$ links forming a vector loop from point A to point B, the closure equation in scalar form (x-projection) is:

$\sum_{k=1}^{n} r_k\sin\phi_k = y_B - y_A$
$\sum_{k=1}^{n} r_k\cos\phi_k = x_B - x_A$✔️
$\prod_{k=1}^{n} r_k\cos\phi_k = x_B - x_A$
$\sum_{k=1}^{n} r_k = |r_B - r_A|$

Correct Answer Logic:

The vector loop equation projected onto the x-axis yields $\sum_{k=1}^n r_k\cos\phi_k = x_B - x_A$ and onto y gives $\sum_{k=1}^n r_k\sin\phi_k = y_B - y_A$.

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Others section QUESTION #4695

Question 1891

Gorbachev's policy termed 'Peredyshka' referred to which concept?

Free Trade
Breathing space✔️
Terrorist Movement
Non-Alignment

Correct Answer Logic:

Peredyshka is a Russian term meaning 'breathing space' or 'respite,' referring to a tactical pause or period of consolidation in Soviet foreign policy under Gorbachev.

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Chemistry QUESTION #4341

Question 1892

Pick the crystalline solid:

Cement
Ceramics
Concrete
Copper✔️

Correct Answer Logic:

Copper is a crystalline solid with a face-centered cubic (FCC) lattice structure. Cement, ceramics, and concrete are amorphous or mixed solids.

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Tourism & Hospitality Management QUESTION #1640

Question 1893

According to the Restaurant Management course, 'Mise en Place' and 'Mise en Scène' are foundational restaurant service concepts. Which of the following correctly distinguishes them?

Mise en Place refers to French cuisine; Mise en Scène refers to Italian cuisine
Mise en Place refers to preparing and organizing all equipment, condiments, and materials before service begins; Mise en Scène refers to setting up and presenting the dining environment aesthetically before guests arrive✔️
Mise en Place is the menu design process; Mise en Scène is the kitchen brigade organization
Mise en Place covers billing procedures; Mise en Scène covers entertainment arrangements

Correct Answer Logic:

The Restaurant Management course (Module 2: Restaurant Facilities) covers both concepts: Mise en Place (French: 'everything in its place') refers to the pre-service preparation of all service tools, condiments, and materials, while Mise en Scène (French: 'setting the scene') refers to the aesthetic preparation of the dining environment — lighting, furniture arrangement, décor — before guests arrive.

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Economics QUESTION #1692

Question 1894

In the IS-LM model of macroeconomic equilibrium, the LM curve traces out all combinations of income and interest rates at which:

The goods and services market is in equilibrium
The government budget is balanced
The money market (financial market) is in equilibrium✔️
None of these

Correct Answer Logic:

The LM curve (L = Liquidity preference, M = Money supply) represents all combinations of real income (Y) and interest rate (r) at which the money market is in equilibrium — where money demand equals money supply ($L(Y, r) = M/P$). As income rises, money demand increases, requiring a higher interest rate to maintain equilibrium. The IS curve represents equilibrium in the goods market.

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Basic Mathematics QUESTION #4634

Question 1895

What is the value of $2 + 3 \times 4 - 5$?

$15$
$9$✔️
$4$
$20$

Correct Answer Logic:

PEMDAS: $2 + 12 - 5 = 9$

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Agronomy QUESTION #2046

Question 1896

Integrated Pest Management (IPM) in crop protection is best described as:

Exclusive reliance on biological control agents to eliminate all crop pests
A decision-based process using site-specific information to prevent pests from reaching economically damaging levels through coordinated use of multiple compatible tactics including biological, cultural, physical, and chemical methods✔️
Scheduled calendar-based pesticide application to prevent any pest damage
Total elimination of all pest populations from the farm ecosystem

Correct Answer Logic:

IPM is an ecosystem-based strategy that uses economic thresholds to decide when intervention is needed, then employs the most compatible combination of biological (natural enemies), cultural (crop rotation, resistant varieties), physical, and chemical (as last resort) tactics to manage pests below economically damaging levels with minimum environmental impact.

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Mathematics QUESTION #4126

Question 1897

For $f(z) = \frac{1}{z} = \frac{\cos(\theta)}{r} - i\frac{\sin(\theta)}{r}$ in polar form, compute $u_r$ and verify C-R equations. What is $u_r$?

$-\frac{\cos(\theta)}{r^2}$✔️
$-\frac{1}{r^2}$
$\frac{\cos(\theta)}{r}$
$\frac{1}{r}$

Correct Answer Logic:

$u = \frac{\cos(\theta)}{r}$, so $u_r = -\frac{\cos(\theta)}{r^2}$. Also $v = -\frac{\sin(\theta)}{r}$, so $v_\theta = -\frac{\cos(\theta)}{r}$. Then $\frac{1}{r}v_\theta = -\frac{\cos(\theta)}{r^2} = u_r$. C-R satisfied.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3061

Question 1898

'Pharmacy Technician' is categorized as what level of pharmacy practitioner in Pakistan?

Category A
Category B✔️
Category C
Category D

Correct Answer Logic:

Pharmacists are Category A; Pharmacy Technicians are Category B.

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Boilers Mechanical Engineering QUESTION #4001

Question 1899

Why is 'Internal Water Treatment' necessary even if external treatment is used?

To make the water look clear
To neutralize residual hardness and prevent corrosion/pitting✔️
To increase the boiling point
To decrease the volume of water

Correct Answer Logic:

Chemicals are added directly to the drum to handle any remaining contaminants.

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Chemistry QUESTION #1418

Question 1900

A zero-order reaction rate does not depend on:

Temperature
Pressure
Reactant concentration✔️
None of these

Correct Answer Logic:

For a zero-order reaction, the rate law is: $\text{rate} = k[\text{A}]^0 = k$. The rate is equal to the rate constant $k$ and is independent of the concentration of reactants. However, the rate constant $k$ itself depends on temperature (via the Arrhenius equation), so temperature does affect the rate — but concentration does not.

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