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Islamic Studies QUESTION #214

Question 1

Which leader is known for strategic brilliance at the Battle of Yarmouk?

Ali ibn Abi Talib
Abu Ubaidah
Sa'd ibn Abi Waqqas
Khalid ibn al-Walid✔️

Correct Answer Logic:

Khalid ibn al-Walid's tactics were decisive in the defeat of the Byzantine forces.

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Chemistry QUESTION #4348

Question 2

In propene, the $\pi$-bond is formed by sideway overlap of:

s-orbitals
p-orbitals✔️
$sp^3$ hybrid orbitals
$sp^2$ hybrid orbitals

Correct Answer Logic:

In propene ($CH_3CH=CH_2$), the double bond carbons are $sp^2$ hybridized. The $\pi$-bond is formed by the lateral (sideway) overlap of unhybridized $p$-orbitals perpendicular to the molecular plane.

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Math (Module-1) QUESTION #5473

Question 3

Square $P$ has side length $x$ inches. Square $Q$ has a perimeter that is $176$ inches greater than the perimeter of square $P$. The function $f$ gives the area of square $Q$. Which defines $f$?

$f(x) = (x + 44)^2$✔️
$f(x) = (x + 176)^2$
$f(x) = (176x + 44)^2$
$f(x) = (176x + 176)^2$

Correct Answer Logic:

$Perimeter_P = 4x$. $Perimeter_Q = 4x + 176 = 4(x + 44)$. So $Side_Q = x + 44$. Area $f(x) = (x + 44)^2$.

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Basic Mathematics QUESTION #4573

Question 4

A set is divided in ratio $2:3$. If there are $50$ total items, how many are in the smaller group?

$20$✔️
$30$
$10$
$25$

Correct Answer Logic:

Total parts = $2+3=5$. Smaller part = $\frac{2}{5} \times 50 = 20$

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General Science and Ability QUESTION #196

Question 5

Which of the following products can be prepared using raw guava?

Jam
Jelly
Both (A) and (B)✔️
None of these

Correct Answer Logic:

Guava is rich in pectin, making it ideal for both jams and jellies.

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Chemistry QUESTION #1426

Question 6

The solubility of a gas in a liquid is directly proportional to the partial pressure of the gas above the liquid. This statement is based upon:

Raoult's law
Henry's law✔️
Kohlrausch's law
None of these

Correct Answer Logic:

Henry's Law states: $C = k_H \cdot P$, where $C$ is the concentration of dissolved gas, $P$ is the partial pressure of the gas above the liquid, and $k_H$ is Henry's law constant. Raoult's law relates vapour pressure of solutions; Kohlrausch's law relates molar conductivity of electrolytes at infinite dilution.

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Biology QUESTION #4330

Question 7

According to the Lock and Key model, the active site is regarded as:

Rigid and specific✔️
Flexible and specific
Rigid and non-specific
Flexible and non-specific

Correct Answer Logic:

The Lock and Key model (Fischer, 1894) proposes that the enzyme active site has a fixed, rigid shape that is exactly complementary to a specific substrate — rigid and specific.

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Mechanical Engineering QUESTION #2531

Question 8

For a particle moving in a circular path of radius $R$ with constant speed $v$, the magnitude of total acceleration is:

$\frac{v^2}{R}$ directed toward the center✔️
$\frac{v}{R}$ tangentially
$\dot{v}$ only
$\sqrt{\dot{v}^2 + (v^2/R)^2}$ — always larger than $v^2/R$

Correct Answer Logic:

For constant speed circular motion, $\dot{v}=0$, so the tangential acceleration is zero. Only the normal (centripetal) acceleration exists: $a_n=v^2/R$, directed toward the center.

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City and Regional Planning QUESTION #4955

Question 9

What is the main advantage of GIS over traditional mapping?

Lower cost
Spatial analysis and data integration capabilities✔️
Simpler to use
Requires less training

Correct Answer Logic:

GIS enables sophisticated spatial analysis, multi-layered data integration, dynamic querying, and modeling capabilities far beyond traditional static maps, supporting complex planning decisions.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3267

Question 10

'Hemolysis' refers to the:

Production of blood
Destruction of Red Blood Cells✔️
Clotting of blood
Filtering of blood

Correct Answer Logic:

Hemolysis releases hemoglobin into the plasma.

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English QUESTION #2780

Question 11

What does the PHRASAL VERB 'LOOK AFTER' mean?

To search for something
To look behind oneself
To take care of someone or something✔️
To ignore someone

Correct Answer Logic:

'Look after' means to take care of someone or something. Example: 'Can you look after my cat while I'm on vacation?' The words together form a meaning different from 'look' and 'after' separately.

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Chemistry QUESTION #1015

Question 12

Toluene (excess) is treated with $\text{CrO}_2\text{Cl}_2$, $\text{CS}_2$, then $\text{H}_3\text{O}^+$, then $\text{NaHSO}_3$ to give Residue (A). Residue (A) + HCl (dil) $\to$ Compound (B). Structure of Residue (A) and Compound (B) respectively is:

[A] = benzaldehyde (CHO), [B] = sodium benzoate (COONa)
[A] = benzaldehyde bisulphite (PhCH(OH)SO$_3$Na), [B] = benzaldehyde
[A] = $\text{CH(OCrOHCl}_2)_2$ (chromate acetal), [B] = benzaldehyde
[A] = bisulphite addition product ($\text{PhCH(OH)SO}_3\text{Na}$), [B] = benzaldehyde (PhCHO)✔️

Correct Answer Logic:

Etard reaction: toluene $+\text{CrO}_2\text{Cl}_2\to$ chromium complex $\xrightarrow{\text{H}_3\text{O}^+}$ benzaldehyde. Benzaldehyde $+\text{NaHSO}_3\to$ bisulphite addition product (Residue A). Bisulphite adduct $+\text{HCl}\to$ benzaldehyde regenerated (Compound B). So A = bisulphite adduct, B = benzaldehyde.

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Mathematics QUESTION #4119

Question 13

Solve $x^2 + x > 2$ for $x \in \mathbb{R}$. What is the solution set?

$(-\infty, -2) \cup (1, +\infty)$✔️
$(-2, 1)$
$(-\infty, -1) \cup (2, +\infty)$
$[-2, 1]$

Correct Answer Logic:

$x^2 + x - 2 > 0 \Rightarrow (x+2)(x-1) > 0$. Critical points $-2, 1$. Solution: $x < -2$ or $x > 1$.

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Islamic Studies QUESTION #623

Question 14

The Prophet Muhammad (ﷺ) advised the name of Hazrat Abubakar (رضي الله عنه) after embracing Islam as:

Abubakar (رضي الله عنه)
Abdullah (رضي الله عنه)✔️
Abdur Rehman (رضي الله عنه)
Abul Wafa (رضي الله عنه)

Correct Answer Logic:

The Prophet (ﷺ) changed his name from Abdul Ka'aba to Abdullah.

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Tourism & Hospitality Management QUESTION #1593

Question 15

In the context of sustainable tourism, the 'triple bottom line' refers to which three areas of accountability for tourism businesses?

Profit, Marketing, and Operations
Economic viability, Social equity, and Environmental responsibility✔️
Government policy, Industry standards, and NGO oversight
Quality, Safety, and Sustainability

Correct Answer Logic:

The triple bottom line (TBL) framework — covered in the Sustainable Tourism course — holds tourism businesses accountable across three dimensions: Economic viability (financial sustainability), Social equity (community benefit), and Environmental responsibility (ecological protection) — not just financial profit.

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Basic Mathematics QUESTION #4536

Question 16

Simplify: $\sqrt{18}$

$3\sqrt{2}$✔️
$2\sqrt{3}$
$9\sqrt{2}$
$6\sqrt{3}$

Correct Answer Logic:

$\sqrt{18} = \sqrt{9 \times 2} = \sqrt{9} \times \sqrt{2} = 3\sqrt{2}$

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Basic Mathematics QUESTION #2808

Question 17

What is the value of $(-3)^4 - (-2)^3$?

73
89✔️
81
89

Correct Answer Logic:

$(-3)^4 = 81$ (positive, since even exponent) and $(-2)^3 = -8$ (negative, since odd exponent). So $81 - (-8) = 81 + 8 = 89$.

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General Knowledge QUESTION #2615

Question 18

A Hard Disk Drive (HDD) works by using:

Electronic flash memory chips with no moving parts
A spinning platter and a mechanical arm to read and write information✔️
A network connection to store data in the cloud
Light beams and optical lenses to read data from a disc

Correct Answer Logic:

An HDD (Hard Disk Drive) uses a spinning platter and a mechanical arm to read and write information. The platter spins at high RPM (Revolutions Per Minute) while the arm moves across it to access data.

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Statistics QUESTION #1971

Question 19

The range of values that the test statistic $t$ can take is:

0 to $\infty$
0 to 1
$-\infty$ to $+\infty$✔️
$-1$ to $+1$

Correct Answer Logic:

The t-statistic is unbounded and can take any real value from $-\infty$ to $+\infty$. It is not restricted to positive values or the interval $[0, 1]$.

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Reading and Writing (Module-1) QUESTION #5372

Question 20

In 2014, Nestor Gomez won his first storytelling contest with a story about his life as a Guatemalan immigrant in Chicago. ______ in 2017, he launched the show '80 Minutes Around the World' to give other immigrants a stage to share their own experiences. Which choice completes the text with the most logical transition?

Instead,
For example,
Later,✔️
In other words,

Correct Answer Logic:

The transition connects a 2014 event to a 2017 event, so 'Later' is the most appropriate choice.

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