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MCQs Section QUESTION #5075

Question 10901

فصیلِ شب کس شاعر کی تحریر ہے؟

حفیظ جالندھری
محمد حسین آزاد
علامہ اقبال
مرزا ادیب✔️

Correct Answer Logic:

فصیلِ شب مرزا ادیب کی مشہور ادبی تصنیف ہے۔

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Chemistry QUESTION #1074

Question 10902

Assertion (A): Alkyl iodide (R–I) undergoes S$_N$2 reaction faster than alkyl chloride (R–Cl). Reason (R): Iodine is a better leaving group because of its large size.

A is true but R is false
A is false but R is true
Both A and R are true and R is the correct explanation of A✔️
Both A and R are true but R is not the correct explanation of A

Correct Answer Logic:

Both A and R are true. R–I reacts faster in S$_N$2 than R–Cl because I$^-$ is a much better leaving group — it is larger, more polarizable, and the C–I bond is weaker. The large size of iodine means the C–I bond is longer and weaker, making it easier to break. R correctly explains A.

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Electronics Engineering QUESTION #11729

Question 10903

A spectrum analyser shows a fundamental at $100\,\text{MHz}$ and a spur at $110\,\text{MHz}$. This $10\,\text{MHz}$ spur is most likely caused by:

Harmonic distortion in the power amplifier
Intermodulation or mixing with a $10\,\text{MHz}$ reference clock signal✔️
Cable impedance mismatch creating standing waves
The spectrum analyser's own local oscillator leakage

Correct Answer Logic:

A spur exactly offset by $10\,\text{MHz}$ from the carrier strongly suggests mixing (intermodulation) between the $100\,\text{MHz}$ signal and a $10\,\text{MHz}$ reference, clock, or IF signal present in the system — producing sum ($110\,\text{MHz}$) and difference ($90\,\text{MHz}$) products. Harmonics would appear at $200\,\text{MHz}$, $300\,\text{MHz}$, etc.

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Maths QUESTION #4618

Question 10904

Solve for $x$: $x + y = 10$ and $x - y = 2$

$x = 4$
$x = 6$✔️
$x = 8$
$x = 5$

Correct Answer Logic:

Add equations: $2x = 12$, so $x = 6$

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3408

Question 10905

'ATP' is often called the 'Energy Currency' of the cell because energy is stored in its:

Nitrogenous base
High-energy phosphate bonds✔️
Ribose sugar
Oxygen atoms

Correct Answer Logic:

Breaking the phosphate bond releases energy for cellular work.

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Therapeutics and Patient Care QUESTION #3867

Question 10906

Following the primary tetanus toxoid immunisation series, how frequently should booster doses be administered in healthy adults?

Every 2 years
Every 3 years
Every 5 years
Every 10 years✔️

Correct Answer Logic:

Tetanus booster injections are recommended every 10 years after completion of the primary immunisation schedule.

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General Knowledge QUESTION #11541

Question 10907

Stealing someone's personal details to illegitimately pose as them is known as:

Spooling
Identity Theft✔️
Spoofing
Hacking

Correct Answer Logic:

Identity theft is stealing another person's personal information (name, ID numbers, bank details, passwords) to fraudulently assume their identity, typically for financial gain. It is one of the fastest-growing cybercrimes. Prevention includes strong passwords, two-factor authentication, and monitoring credit reports.

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Maths QUESTION #7654

Question 10908

A person has Rs 2, Rs 5, and Rs 10 coins amounting to Rs 472. The ratio of the number of Rs 2 coins to Rs 5 coins to Rs 10 coins is 2:3:4. Find the number of Rs 2 coins.

$20$
$13$
$8$
None of these✔️

Correct Answer Logic:

Let the number of Rs 2, Rs 5, and Rs 10 coins be $2x$, $3x$, and $4x$. Total amount: $2(2x) + 5(3x) + 10(4x) = 472$. Simplifying: $4x + 15x + 40x = 472$, so $59x = 472$, giving $x = 8$. Number of Rs 2 coins = $2x = 2(8) = 16$. Since 16 is not in the options, the answer is 'None of these'.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3425

Question 10909

'Hydrogen Bonds' in DNA occur between:

Sugar and Phosphate
Nitrogenous bases✔️
Phosphate and Oxygen
Carbon atoms

Correct Answer Logic:

They hold the two strands of the double helix together.

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English QUESTION #2671

Question 10910

Choose the correct meaning of the idiom: 'Once in a blue moon'

Frequently
Rarely✔️
Every night
In the morning

Correct Answer Logic:

It refers to an event that happens very infrequently.

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Accounting & Finance QUESTION #1197

Question 10911

If two companies use different depreciation methods, the comparability of their financial information may be compromised unless:

The companies belong to the same regulatory framework.
They operate in similar markets.
The companies use IFRS standards.
Full disclosure of the methods is provided.✔️

Correct Answer Logic:

Comparability requires that users can identify and understand similarities and differences between entities. When different accounting methods are used, comparability is preserved if the entity fully discloses the method used, enabling users to adjust and compare. Full disclosure (in notes to financial statements) is the key safeguard.

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Math Physics Chemistry Biology QUESTION #559

Question 10912

Name the class that contains seedless plants.

Angiospermae
Gemnospermae
Paraphsys
Filicineae✔️

Correct Answer Logic:

Filicineae (ferns) are seedless vascular plants

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Administration QUESTION #2943

Question 10913

What is the primary focus of "Supply Chain Management" (SCM)?

Managing the internal social media of a corporation
Coordinating the flow of goods and services from origin to consumption✔️
Focusing solely on the final retail sale of a product
None of these

Correct Answer Logic:

SCM involves the oversight of materials, information, and finances as they move in a process from supplier to manufacturer to wholesaler to retailer.

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Maths QUESTION #4543

Question 10914

What is $\frac{2}{3} \times \frac{3}{4}$?

$\frac{5}{7}$
$\frac{6}{12}$
$\frac{1}{2}$
Both B and C✔️

Correct Answer Logic:

$\frac{2}{3} \times \frac{3}{4} = \frac{2 \times 3}{3 \times 4} = \frac{6}{12} = \frac{1}{2}$

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MCQs Section QUESTION #5189

Question 10915

قواعد کے کتنے حصے ہیں؟

8
6
4
2✔️

Correct Answer Logic:

قواعد کے دو بنیادی حصے ہیں: صرف اور نحو۔

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General Knowledge QUESTION #8878

Question 10916

Who wrote 'The Origin of Species'?

Karl Marx
Charles Darwin✔️
Albert Einstein
Niels Bohr

Correct Answer Logic:

Darwin authored The Origin of Species.

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Physics QUESTION #6991

Question 10917

A parallel plate capacitor (square plates of side $a$, separation $d$, with $d \ll a$) has its lower triangular half filled with a dielectric of constant $K$. What is the capacitance of this arrangement?

$\dfrac{K\varepsilon_0 a^2}{2d(K+1)}\ln K$
$\dfrac{K\varepsilon_0 a^2}{d(K-1)}\ln K$✔️
$\dfrac{K\varepsilon_0 a^2}{d}\ln K$
$\dfrac{1}{2}\dfrac{K\varepsilon_0 a^2}{d}$

Correct Answer Logic:

Consider the capacitor as strips of width $dx$ parallel to the shorter side. At horizontal position $x$ from the left, the gap has dielectric filling of height $\frac{d \cdot x}{a}$ (triangular region). The local gap (from bottom) filled with dielectric is $\frac{xd}{a}$ and air gap is $d - \frac{xd}{a} = \frac{d(a-x)}{a}$.

Each strip is two capacitors in series (dielectric + air). Integrating across the width gives:

$C = \int_0^a \frac{\varepsilon_0 K \cdot a \, dx}{d[(K-1)x/a + 1] \cdot a} \Rightarrow C = \frac{K\varepsilon_0 a^2}{d(K-1)}\ln K$

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Physics QUESTION #1156

Question 10918

When the net wave intensity is greater than the individual intensities, the interference of the waves is said to be:

Constructive✔️
Destructive
Both (A) & (B)
None of these

Correct Answer Logic:

In constructive interference, waves add in phase, resulting in a net intensity greater than the sum of individual intensities. The amplitude is maximum when path difference $= n\lambda$ (where $n = 0, 1, 2, \ldots$).

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