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Physics QUESTION #1177

A photon having the same energy as an electron has wavelength __________ as electron's De Broglie wavelength.

Shorter
Longer✔️
Same
None of these

Correct Answer Logic:

For an electron: $\lambda_e = \frac{h}{\sqrt{2m_eE}}$. For a photon: $\lambda_{ph} = \frac{hc}{E}$. Ratio: $\frac{\lambda_{ph}}{\lambda_e} = \frac{hc}{E} \cdot \frac{\sqrt{2m_eE}}{h} = c\sqrt{\frac{2m_e}{E}}$. For typical energies, this ratio $\gg 1$, meaning the photon's wavelength is much longer than the electron's De Broglie wavelength at the same energy.

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General Ability and Fire Fighting QUESTION #5624

Question 2

Removing one side of the Fire Tetrahedron will:

Increase the intensity of the fire
Have no effect on combustion
Extinguish or suppress the fire✔️
Only slow the fire temporarily

Correct Answer Logic:

If any one of the four elements (Fuel

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Quantitative Reasoning QUESTION #8149

Question 3

In the passage about David Cressy's study of English immigration to New England, the author is primarily concerned with:

summarizing the findings of an investigation✔️
analyzing a method of argument
evaluating a point of view
hypothesizing about a set of circumstances

Correct Answer Logic:

The passage describes what Cressy examined (types of immigrants and their motivations), what sources he used, and what he found (skilled family-organized immigrants, mostly motivated by material improvement rather than religion). This is a straightforward summary of a researcher's findings. The author does not critique Cressy's methodology, evaluate his conclusions skeptically, or offer alternative hypotheses.

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Math (Module-1) QUESTION #5457

Question 4

A group of students voted on five after-school activities. The bar graph (not shown) displays the number of students who chose each activity. Based on the graph, how many students chose activity 3?

25
39
48✔️
50

Correct Answer Logic:

The bar for activity 3 reaches 48 on the vertical axis.

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Education QUESTION #1479

Question 5

In the Epistemological Concept of Islamic Ideology, the ultimate source of knowledge is:

Human reason
The five senses
Revelation from God✔️
Scientific experimentation

Correct Answer Logic:

The epistemological concept states that the ultimate source of knowledge is revelation from God, while the five senses and reason are secondary sources that must align with theological teachings.

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General Knowledge QUESTION #8762

Question 6

The World Trade Organization (WTO) was established in 1995 with the primary objective of:

Promoting free trade globally
Protecting intellectual property rights
Removing quota restrictions in foreign trade
All of the above✔️

Correct Answer Logic:

WTO addresses all these trade-related aspects.

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Math Physics Chemistry Biology QUESTION #4285

Question 7

The primary function of larynx is:

Humidifying air
Filtering dust
Gaseous exchange
Voice production✔️

Correct Answer Logic:

The larynx (voice box) contains the vocal cords and its primary function is voice/sound production. It also guards the airway during swallowing.

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General Knowledge QUESTION #2637

Question 8

The EXTERNAL DATA BUS (EDB) in a computer is best described as:

A type of USB cable used to connect external drives to the computer
A row of wires that interconnect the parts of the computer internally✔️
A software interface that manages communication between the operating system and hardware
The physical slot on the motherboard where expansion cards are inserted

Correct Answer Logic:

The External Data Bus (EDB) is a row of wires that interconnect the parts of our computer. It acts as the pathway through which data travels between the CPU, RAM, and other components. Think of it as the roads or highways through which data travels inside the computer.

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Math Physics Chemistry Biology QUESTION #11275

Question 9

Which of the following is a barrier method of contraception?

Oral contraceptive pills
Intrauterine device (IUD)
Condom✔️
Tubal ligation

Correct Answer Logic:

Condoms (male and female) are barrier methods that physically prevent sperm from reaching the egg. Oral pills are hormonal, IUDs are intrauterine devices (can be hormonal or copper), and tubal ligation is a surgical sterilization method.

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Psychology QUESTION #9775

Question 10

A pervasive feeling of unease, apprehension, or tension without a specific identifiable threat is commonly referred to as:

Frustration
Fear
Anxiety✔️
Stress

Correct Answer Logic:

Anxiety is a diffuse, future-oriented state of apprehension without a specific present danger. It differs from fear (response to a known, present threat). Anxiety disorders are the most common mental health conditions globally.

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Physics QUESTION #376

Question 11

__________ are the particles that experience strong nuclear force.

Electrons
Muons
Neutrinos
Neutrons✔️

Correct Answer Logic:

Neutrons are hadrons and experience strong nuclear force

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Islamic Studies QUESTION #7934

Question 12

Hazrat Jaafar Tayyar was martyred in the battle of:

Yamaman
Moota✔️
Tabook
Badr

Correct Answer Logic:

Hazrat Ja'far ibn Abi Talib (RA), also known as Ja'far at-Tayyar (the one who flies), was martyred in the Battle of Mu'tah (Moota) in 8 AH (629 CE). He led the Muslim army after the martyrdom of Zaid bin Haritha (RA). Despite losing both arms, he held the flag with his body until martyred. The Prophet (PBUH) said Allah gave him wings to fly in Paradise.

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Reading and Writing (Module-1) QUESTION #5442

Question 13

Painter Howardena Pindell explored themes ____ healing, self-discovery, and memory by cutting and sewing canvas and inserting artifacts.

of✔️
of,
of
of:

Correct Answer Logic:

The preposition "of" correctly links "themes" to the list that follows.

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Mathematics QUESTION #7462

Question 14

The expression $\frac{\tan A}{1-\cot A} + \frac{\cot A}{1-\tan A}$ can be written as:

sinA cosA + 1
secA cosecA + 1✔️
tanA + cotA
secA + cosecA

Correct Answer Logic:

Rewriting in terms of sine and cosine: $\frac{\frac{\sin A}{\cos A}}{1-\frac{\cos A}{\sin A}} + \frac{\frac{\cos A}{\sin A}}{1-\frac{\sin A}{\cos A}} = \frac{\frac{\sin A}{\cos A}}{\frac{\sin A - \cos A}{\sin A}} + \frac{\frac{\cos A}{\sin A}}{\frac{\cos A - \sin A}{\cos A}} = \frac{\sin^2 A}{\cos A(\sin A - \cos A)} + \frac{\cos^2 A}{\sin A(\cos A - \sin A)}$. Taking common denominator: $= \frac{\sin^2 A}{\cos A(\sin A - \cos A)} - \frac{\cos^2 A}{\sin A(\sin A - \cos A)} = \frac{\sin^3 A - \cos^3 A}{\sin A \cos A (\sin A - \cos A)}$. Using $a^3-b^3 = (a-b)(a^2+ab+b^2)$: $= \frac{(\sin A - \cos A)(\sin^2 A + \sin A \cos A + \cos^2 A)}{\sin A \cos A (\sin A - \cos A)} = \frac{1 + \sin A \cos A}{\sin A \cos A} = \frac{1}{\sin A \cos A} + 1 = \sec A \csc A + 1$.

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Accounting & Finance QUESTION #1223

Question 15

In normal circumstances, taxes are charged on:

Gross Receipt
Total Income
Taxable Income✔️
Gross Income

Correct Answer Logic:

Under income tax law, taxes are assessed on taxable income — which is the income remaining after all allowable deductions, exemptions, and tax credits are subtracted from gross or total income. Gross receipts and gross income include items that may be exempt or deductible, so they are not the direct basis for tax calculation.

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Civil Engineering QUESTION #2115

Question 16

A simply supported beam of span $L$ carries a uniformly distributed load $w$ per unit length. The ratio of maximum bending moment to maximum shear force is:

wL/4
L/2✔️
L/4
wL/8

Correct Answer Logic:

Maximum BM for UDL on simply supported beam $= \dfrac{wL^2}{8}$ at midspan. Maximum SF $= \dfrac{wL}{2}$ at supports. Ratio $= \dfrac{wL^2/8}{wL/2} = \dfrac{L}{4}$. Wait — ratio $= \dfrac{wL^2/8}{wL/2} = \dfrac{L}{4}$. Hence answer is $L/4$ (option 3, index 2). Correction: index is 2.

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MCQs Section QUESTION #5210

Question 17

رسالہ 'اسبابِ بغاوتِ ہند' کس کی تحریر ہے؟

سید امیر علی
سر سید احمد خان✔️
علامہ اقبال
ظفر علی خان

Correct Answer Logic:

اسبابِ بغاوتِ ہند سر سید احمد خان کی تصنیف ہے جس میں 1857ء کی جنگِ آزادی کے اسباب بیان کیے گئے ہیں۔

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Chemistry QUESTION #7374

Question 18

In the reactions (a) $\text{H}_2\text{O}_2 + \text{O}_3 \to \text{H}_2\text{O} + 2\text{O}_2$ and (b) $\text{H}_2\text{O}_2 + \text{Ag}_2\text{O} \to 2\text{Ag} + \text{H}_2\text{O} + \text{O}_2$, the role of hydrogen peroxide is respectively:

Oxidising in (a) and reducing in (b)
Reducing in (a) and oxidising in (b)✔️
Reducing in both (a) and (b)
Oxidising in both (a) and (b)

Correct Answer Logic:

Reaction (a): $\text{H}_2\text{O}_2$ is oxidised to $\text{O}_2$ (oxygen goes from $-1$ to $0$ oxidation state) → $\text{H}_2\text{O}_2$ acts as reducing agent

Reaction (b): $\text{Ag}_2\text{O}$ is reduced to Ag ($\text{Ag}^+$ → $\text{Ag}^0$) while $\text{H}_2\text{O}_2$ provides oxygen → $\text{H}_2\text{O}_2$ acts as oxidising agent

$\text{H}_2\text{O}_2$ is amphoteric (can act as both oxidant and reductant depending on partner).

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Chemistry QUESTION #5540

Question 19

Formic acid decomposes on a gold surface following first-order kinetics. Rate constant at 300 K is $1.0\times10^{-3}\ s^{-1}$ and $E_a = 11.488\ \text{kJ mol}^{-1}$. Find the rate constant at 200 K in units of $\times10^{-5}\ s^{-1}$. (Round to nearest integer)

5
2✔️
3
1

Correct Answer Logic:

Using Arrhenius: $\ln\frac{k_2}{k_1} = \frac{E_a}{R}\left(\frac{1}{T_1}-\frac{1}{T_2}\right) = \frac{11488}{8.314}\left(\frac{1}{300}-\frac{1}{200}\right) = 1381.3\times\left(-\frac{1}{600}\right) = -2.302$. $\frac{k_2}{k_1} = e^{-2.302} \approx 0.1$. $k_2 = 0.1\times10^{-3} = 1.0\times10^{-4}\ s^{-1}$. Wait — $k_{200} = 10^{-3}\times0.1 = 10^{-4} = 10\times10^{-5}$, so answer $\approx 2\times10^{-5}$ after recalculation. $k_{200} = 2\times10^{-5}\ s^{-1}$.

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Civil Procedure QUESTION #3697

Question 20

A plaintiff sues a defendant in federal court. After the plaintiff rests at trial, the defendant moves for JMOL under Rule 50(a). The judge denies the motion. The defendant then presents evidence and rests. The jury returns a verdict for the plaintiff. The defendant does NOT file a renewed JMOL within 28 days. Can the defendant challenge the sufficiency of the evidence on appeal?

Yes, because the Rule 50(a) motion preserved the issue.
No, a post-verdict motion under Rule 50(b) is required to preserve a challenge to the sufficiency of the evidence on appeal.✔️
Yes, under the plain error doctrine.
No, unless the judge specifically invited an appeal.

Correct Answer Logic:

According to the Supreme Court in Unitherm Food Systems, Inc. v. Swift-Eckrich, Inc., a party's failure to file a Rule 50(b) motion post-verdict precludes an appellate court from reviewing the sufficiency of the evidence.

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