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Chemistry QUESTION #1016

The alkane from below having exactly two secondary hydrogens is:

4-Ethyl-3,4-dimethyloctane
2,2,3,3-Tetramethylpentane✔️
2,2,4,5-Tetramethylheptane
2,2,4,4-Tetramethylhexane

Correct Answer Logic:

In 2,2,3,3-tetramethylpentane: $\text{CH}_3\text{C(CH}_3)_2\text{-C(CH}_3)_2\text{-CH}_2\text{CH}_3$. The $\text{-CH}_2\text{-}$ group has 2 secondary H atoms and the terminal $\text{CH}_3$ of ethyl has... carefully counting only secondary carbons (bonded to exactly 2 carbons): 2,2,3,3-tetramethylpentane has exactly 2 secondary H atoms.

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English QUESTION #8434

Question 2

Identify the correctly spelled word:

Attraction✔️
Infraction
Revision
Intention

Correct Answer Logic:

All correct. Key says A 'Attraction'.

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General Knowledge QUESTION #9011

Question 3

Michael Dell is a major name in which field?

Luxembourg's stock market
Today's computer world (Dell Computers)✔️
Latin America's drug mafia
German politics

Correct Answer Logic:

Michael Dell founded Dell Computers.

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Mathematics QUESTION #978

Question 4

Let $\alpha_\theta$ and $\beta_\theta$ be the distinct roots of $2x^2+(\cos\theta)x-1=0,\ \theta\in(0,2\pi)$. If $m$ and $M$ are the minimum and maximum values of $\alpha_\theta^4+\beta_\theta^4$, then $16(M+m)$ equals:

24
25✔️
17
27

Correct Answer Logic:

By Vieta's: $\alpha+\beta=-\frac{\cos\theta}{2}$, $\alpha\beta=-\frac{1}{2}$. Then $\alpha^2+\beta^2=(\alpha+\beta)^2-2\alpha\beta=\frac{\cos^2\theta}{4}+1$. And $\alpha^4+\beta^4=(\alpha^2+\beta^2)^2-2(\alpha\beta)^2=\left(\frac{\cos^2\theta}{4}+1\right)^2-\frac{1}{2}$. Let $u=\cos^2\theta\in[0,1]$. Max at $u=1$: $M=\frac{25}{16}-\frac{1}{2}=\frac{17}{16}$. Min at $u=0$: $m=1-\frac{1}{2}=\frac{1}{2}$. So $16(M+m)=16\cdot\frac{25}{16}=25$.

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Administration QUESTION #2928

Question 5

The "Open System" of recruitment in public service allows for:

Entry only at the base level
Lateral entry at various levels✔️
Only internal promotions
No competitive testing

Correct Answer Logic:

An open system allows qualified candidates from outside the government to enter the service at different ranks or specialized positions.

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MBBS QUESTION #10255

Question 6

Physiological dead space is defined as:

The sum of anatomical dead space (conducting airways) plus alveolar dead space (ventilated but poorly perfused alveoli)✔️
Only the volume contained within the trachea and bronchi
Total lung capacity minus vital capacity
The residual volume remaining after maximal expiration

Correct Answer Logic:

Physiological dead space includes both the fixed anatomical dead space of the conducting airways and any alveolar dead space — alveoli that are ventilated but not adequately perfused (wasted ventilation) — which increases in conditions like pulmonary embolism.

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Math Physics Chemistry Biology QUESTION #7733

Question 7

Bacteria that completely lack flagella are called:

Amphitrichous
Atrichous✔️
Lophotrichous
Peritrichous

Correct Answer Logic:

Atrichous (or atrichiate) bacteria have no flagella. Amphitrichous: flagella at both ends; Lophotrichous: tuft at one end; Peritrichous: flagella all around.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3149

Question 8

The 'Sclera' is the:

Colored part of the eye
White, outer layer of the eye✔️
Clear window of the eye
Back of the eye

Correct Answer Logic:

The sclera provides structure and protection.

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Chemistry QUESTION #475

Question 9

The crystals of __________ are ionic solids.

Sugar
Iron
Diamond
NaCl✔️

Correct Answer Logic:

NaCl forms ionic crystals

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General Knowledge QUESTION #280

Question 10

The UN Climate Change Conference (COP28) was held in:

Copenhagen
Bonn
Brussels
None of these✔️

Correct Answer Logic:

COP28 was held in Dubai, United Arab Emirates (UAE) in late 2023.+1

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General Knowledge QUESTION #4799

Question 11

Who was the first Chief Minister of Balochistan from May 1972 to February 1973?

Sher Bux Marri
Sardar Attaullah Mengal✔️
Nawab Akbar Bugti
Ghaus Bux Bizenjo

Correct Answer Logic:

Sardar Attaullah Mengal served as the first Chief Minister of Balochistan from May 1972 to February 1973, leading the National Awami Party (NAP) government.

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MCQs Section QUESTION #5039

Question 12

تارے گننا محاورے کا کیا مطلب ہے؟

سوئے رہنا
جاگتے رہنا
رات بھر جاگتے رہنا✔️
ان میں سے کوئی نہیں

Correct Answer Logic:

تارے گننا محاورے کا مطلب ہے رات بھر بے خوابی میں جاگتے رہنا۔

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Geology QUESTION #10666

Question 13

In the Cretaceous petroleum system of the Lower Indus Basin, Pakistan, the seal rock is provided by the:

Upper Goru Shale Formation✔️
Ranikot Formation
Ghazij Formation
None of these

Correct Answer Logic:

In the Lower Indus Basin's Cretaceous petroleum system, the Upper Goru Shale (Cretaceous, Upper Cretaceous) serves as the primary seal (cap) rock. The reservoir is the Lower Goru sandstone (fluvio-deltaic sandstones). This system is the most prolific in Pakistan, accounting for the majority of gas production. The Sui gas field (largest in Pakistan) produces from Eocene Sui Main Limestone, but Cretaceous fields use the Goru shale seal.

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Quantitative Reasoning QUESTION #8037

Question 14

EXPAND : VOLUME :: (Find the pair that best matches the relationship between the given words)

ascend : flight
proliferate : number✔️
bend : flexibility
cool : temperature

Correct Answer Logic:

To EXPAND is to increase VOLUME — the verb causes an increase in that measurable quantity. To proliferate is to increase in number — the verb similarly causes an increase in that quantity. Both pairs = [verb meaning to increase] : [the measurable quantity that increases]. 'Cool:temperature' is the opposite (cooling decreases temperature).

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Statistics QUESTION #1983

Question 15

In a two-way ANOVA with interaction (subjects $\times$ students, with replication), if $SS_{Total} = SS_{Rows} + SS_{Cols} + SS_{Interaction} + SS_{Error}$, the degrees of freedom for the interaction term when there are $r$ rows, $c$ columns, and $n$ replications per cell is:

rc - 1
(r-1)(c-1)✔️
rc(n-1)
rcn - 1

Correct Answer Logic:

In a two-way ANOVA with $r$ row levels, $c$ column levels, and $n$ replications per cell, the degrees of freedom for interaction is $(r-1)(c-1)$. The error df is $rc(n-1)$ and total df is $rcn - 1$.

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Physics QUESTION #7102

Question 16

Using speed ($V$), acceleration ($A$), and force ($F$) as fundamental units, what is the dimension of Young's modulus? [cite: 476]

$V^{-2}A^{2}F^{-2}$
$V^{-2}A^{2}F^{2}$
$V^{-4}A^{-2}F$
$V^{-4}A^{2}F$✔️

Correct Answer Logic:

Young's modulus has the same dimensions as pressure: $[M L^{-1} T^{-2}]$.

$[F] = [M L T^{-2}]$
$[V] = [L T^{-1}]$
$[A] = [L T^{-2}]$
By solving $Y = F^a V^b A^c$, we find $a=1, b=-4, c=2$[cite: 480].

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General Knowledge QUESTION #2620

Question 17

USB stands for Universal Serial Bus. It is primarily used for:

Increasing the processing speed of the CPU
Cooling down the CPU during heavy tasks
Connecting peripheral devices such as keyboards, mice, and flash drives to computers✔️
Storing the BIOS firmware on the motherboard

Correct Answer Logic:

USB (Universal Serial Bus) is a connection standard for connecting peripherals to devices such as computers. It has become the most common way to connect external devices like keyboards, mice, printers, flash drives, and charging cables.

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Civil Engineering QUESTION #6606

Question 18

A wide-flange section is used as a beam-column. If the axial load ratio $P_u / (\phi P_n)$ is greater than 0.2, which interaction equation form is required by AISC?

$\frac{P_u}{\phi P_n} + \frac{M_u}{\phi M_n} \le 1.0$
$\frac{P_u}{2\phi P_n} + \frac{M_u}{\phi M_n} \le 1.0$
$\frac{P_u}{\phi P_n} + \frac{8}{9}(\frac{M_{ux}}{\phi_b M_{nx}} + \frac{M_{uy}}{\phi_b M_{ny}}) \le 1.0$✔️
$\frac{P_u}{\phi P_n} + \frac{1}{2}(\frac{M_u}{\phi M_n}) \le 1.0$

Correct Answer Logic:

For $P_u / \phi P_n \ge 0.2$, the AISC interaction formula weights the axial component fully and reduces the moment component slightly (multiplied by 8/9). For ratios < 0.2, the axial component is halved.

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Verbal Reasoning QUESTION #8181

Question 19

Two trains are moving toward or away from Centerville. Their distances (in miles) from Centerville at time $t$ hours after 12:00 noon are given by:

Train	Distance from Centerville (miles)
Freight train	$-10t + 115$
Passenger train	$-20t + 150$

At what clock time will both trains be at the same distance from Centerville?

$1{:}30$ PM
$3{:}30$ PM✔️
$5{:}10$ PM
$8{:}50$ PM

Correct Answer Logic:

Set the two distance expressions equal:

$-10t + 115 = -20t + 150$

$-10t + 20t = 150 - 115$

$10t = 35$

$t = 3.5$ hours after 12:00 noon $= 3$ hours and $30$ minutes after noon $= \mathbf{3{:}30}$ PM.

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Ability / HR / Governance / Special Education QUESTION #1889

Question 20

Under Rule 8 the procedure in Rule 5 does NOT apply in which of the following situations?

Where the accused is on probation
Where dismissal is based on conduct leading to sentence of fine or imprisonment✔️
Where the accused is on deputation
Where the accused is a contractual employee

Correct Answer Logic:

Rule 8(a) exempts Rule 5 procedure where the accused is dismissed/removed/reduced in rank on grounds of conduct which has led to a sentence of fine or imprisonment.

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