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Math Physics Chemistry Biology QUESTION #7749

Sharks belong to which class of vertebrates?

Chondrichthyes✔️
Echinodermata
Osteichthyes
Urochordata

Correct Answer Logic:

Class Chondrichthyes includes cartilaginous fish (sharks, rays). Osteichthyes are bony fish. Echinodermata are starfish etc.; Urochordata are tunicates.

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Chemistry QUESTION #1087

Question 2

Total number of possible isomers (both structural and stereoisomers) of cyclic ethers of molecular formula $\text{C}_4\text{H}_8\text{O}$ is:

10✔️
11
6
8

Correct Answer Logic:

Cyclic ethers with formula C$_4$H$_8$O: (1) Oxetane ring with methyl substituents, (2) Tetrahydrofuran (THF) — 1 structure, (3) Oxetane + methyl: 2-methyloxetane (2 enantiomers), 3-methyloxetane (1), (4) Oxirane + ethyl/dimethyl: 2-ethyloxirane (2 enantiomers), 2,2-dimethyloxirane (1), 2,3-dimethyloxirane (cis+trans = 3). Total = 1+2+1+2+1+3 = 10.

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Maths QUESTION #2841

Question 3

Find the Compound Interest on Rs. 5000 at $10\%$ per annum for 2 years (compounded annually).

Rs. 950
Rs. 1000
Rs. 1050✔️
Rs. 1100

Correct Answer Logic:

Amount $= P\left(1 + \dfrac{r}{100}\right)^n = 5000 \times \left(\dfrac{110}{100}\right)^2 = 5000 \times 1.21 = 6050$. CI $= 6050 - 5000 = Rs.\ 1050$.

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English QUESTION #8581

Question 4

What is the synonym of 'Icon'?

Symbol✔️
Relative
Mediocrity
Importance

Correct Answer Logic:

Icon means a symbol or representation.

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General Knowledge QUESTION #11505

Question 5

Which method starts a PowerPoint Slide Show presentation from the beginning?

Press the F5 key
Choose 'View Show' from the Slide Show menu
Choose 'Rehearse Timings' from the Slide Show menu
Both A and B✔️

Correct Answer Logic:

A PowerPoint slide show can be started by: (A) pressing F5 (from the beginning) or Shift+F5 (from the current slide), or (B) Slide Show menu → View Show. Both methods work, so the answer is Both A and B.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3477

Question 6

The study of the use of plants by a particular culture or people is known as:

Phytotherapy
Ethnobotany✔️
Pharmacology
Botany

Correct Answer Logic:

Ethnobotany focuses on the relationship between people and plants within their cultural context.

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Education QUESTION #6705

Question 7

A teacher consistently observes that students from lower socioeconomic backgrounds participate less in class discussions. From a diversity and equity perspective, what is the MOST likely systemic factor?

Inherent ability differences
Cultural capital and discourse patterns vary across socioeconomic contexts✔️
Lack of student motivation
Poor parenting practices

Correct Answer Logic:

Cultural capital theory explains that different socioeconomic groups develop different communication patterns and cultural knowledge. Students may possess equal ability but different discourse styles that don't align with classroom expectations. Effective teachers recognize and validate diverse communication patterns.

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Maths QUESTION #4554

Question 8

Which is larger: $\frac{3}{5}$ or $\frac{5}{8}$?

$\frac{3}{5}$
$\frac{5}{8}$✔️
Equal
Cannot compare

Correct Answer Logic:

Convert: $\frac{3}{5} = 0.6$ and $\frac{5}{8} = 0.625$. Since $0.625 > 0.6$, $\frac{5}{8}$ is larger.

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English Literature QUESTION #691

Question 9

"Transcendentalism" emphasizes the importance of:

Tradition
Reason over intuition
Individual intuition✔️
None of these

Correct Answer Logic:

Figures like Emerson believed that individuals have divine intuition and should rely on themselves rather than social institutions.

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General Knowledge QUESTION #8604

Question 10

Which angels are appointed to question the dead in their graves?

Munkir and Nakeer (AS)✔️
Hazrat Jibrael (AS)
Hazrat Israfeel (AS)
Hazrat Mikael (AS)

Correct Answer Logic:

Munkir and Nakeer are the angels of the grave.

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Chemistry QUESTION #1014

Question 11

Statement (I): An element in the extreme left of the periodic table forms acidic oxides. Statement (II): Acid is formed during the reaction between water and the oxide of a reactive element present in the extreme right of the periodic table.

Statement I is true but Statement II is false
Both Statement I and Statement II are true
Both Statement I and Statement II are false
Statement I is false but Statement II is true✔️

Correct Answer Logic:

Statement I is false — elements on the extreme left (alkali metals) form basic oxides (e.g., $\text{Na}_2\text{O} + \text{H}_2\text{O} \to \text{NaOH}$). Statement II is true — elements on the extreme right (halogens) form acidic oxides, e.g., $\text{Cl}_2\text{O} + \text{H}_2\text{O} \to \text{HClO}$.

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Academic/Professional (Social Sciences) QUESTION #10088

Question 12

In Merton's typology, an individual who rejects both goals and means, withdrawing from society, is classified as:

Innovator
Ritualist
Retreatist✔️
Rebel

Correct Answer Logic:

Retreatism involves rejection of both cultural goals and institutionalized means.

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General Knowledge QUESTION #4741

Question 13

What is the total number of member states in the Organisation of Islamic Cooperation (OIC)?

55
57✔️
59
61

Correct Answer Logic:

The OIC has 57 member states, making it the second-largest intergovernmental organization after the United Nations.

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Dairy Food Science and Technology QUESTION #5915

Question 14

The detection of alkali (neutralizer) addition to milk uses which test?

Alizarin test or Rosalic acid test✔️
Clot on boiling test
Alcohol precipitation test
Gerber test

Correct Answer Logic:

Alizarin changes color depending on milk $\text{pH}$: yellow in acidic milk and pink/red in alkaline milk. The Rosalic acid test similarly detects added alkalis ($\text{NaHCO}_3$, $\text{Na}_2\text{CO}_3$, $\text{NaOH}$) used by adulterators to neutralize sour milk. Normal milk gives a yellow-brown color.

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Psychology QUESTION #5585

Question 15

Consider the following table showing values of x and y:

x	y
1	2
2	4
3	6

What is the relationship between x and y?

$y = x$
$y = 2x$✔️
$y = x^2$
$y = x + 2$

Correct Answer Logic:

From the table, each value of y is exactly twice x, so the relationship is $y = 2x$.

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General Knowledge QUESTION #8712

Question 16

Which country's parliament has the largest membership in the world?

India✔️
China
Russia
Canada

Correct Answer Logic:

India's Parliament (Lok Sabha + Rajya Sabha) has over 800 members, but China's NPC is larger (nearly 3,000). Key says India.

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Planning QUESTION #5014

Question 17

In parking demand estimation, what is the typical parking index for office buildings?

1 space per 10 sqm
1 space per 25 sqm
1 space per 50 sqm✔️
1 space per 100 sqm

Correct Answer Logic:

Standard parking requirements for office buildings typically range from 1 space per 40-60 sqm of gross floor area (approximately 1 space per 200-300 sqft), balancing employee/visitor needs with land use efficiency and transit availability.

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Civil Engineering QUESTION #2126

Question 18

The hydraulic grade line (HGL) and energy grade line (EGL) in pipe flow are related such that:

HGL is always above EGL by the velocity head
EGL is always above or equal to HGL by the velocity head $\dfrac{V^2}{2g}$ — the vertical distance between EGL and HGL equals the velocity head at any cross-section✔️
HGL and EGL coincide for all flows
EGL slopes upward in the direction of flow while HGL slopes downward

Correct Answer Logic:

EGL represents total energy head $= \dfrac{p}{\rho g} + z + \dfrac{V^2}{2g}$. HGL represents piezometric head $= \dfrac{p}{\rho g} + z$. The difference is the velocity head: $EGL - HGL = \dfrac{V^2}{2g}$. Both slope downward in flow direction (energy loss). EGL is always above HGL (except at stagnation). When HGL falls below pipe centerline, pressure becomes sub-atmospheric — risk of cavitation and column separation.

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Physics and Math QUESTION #769

Question 19

$\int x\cos x\, dx = ?$

$x\sin x - \cos x + c$
$x\sin x - \cos x - c$✔️
$x\cos x - \sin x + c$
None

Correct Answer Logic:

Using integration by parts: $\int x\cos x\, dx = x\sin x - \int \sin x\, dx = x\sin x + \cos x + c$. Note: The paper marks option B ($x\sin x - \cos x - c$) but the standard result is $x\sin x + \cos x + c$.

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Quantitative Reasoning QUESTION #8128

Question 20

A certain novelist devotes so much description to his characters' clothing that readers quickly sense that such _______ concerns, while not unworthy of notice, have crowded out any more purely literary goals.

didactic
syntactical
irrelevant
sartorial✔️

Correct Answer Logic:

The passage is entirely about descriptions of clothing. Sartorial means relating to tailoring or clothing — it's precisely the word that describes fashion/dress concerns. 'Didactic' means instructional. 'Syntactical' relates to grammar. 'Irrelevant' would be a judgment, not a description of the type of concern. Only 'sartorial' accurately labels the category of concern being described.

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