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Chemistry QUESTION #7510

A car tyre is filled with nitrogen gas at 35 psi at 27°C. The tyre will burst if pressure exceeds 40 psi. At what temperature (in °C) will the tyre burst?

27°C
69°C
72°C✔️
100°C

Correct Answer Logic:

At constant volume: $\dfrac{P_1}{T_1} = \dfrac{P_2}{T_2}$ (Gay-Lussac's Law)

$P_1 = 35\ \text{psi},\ T_1 = 27 + 273 = 300\ \text{K}$

$P_2 = 40\ \text{psi}$

$T_2 = T_1 \times \dfrac{P_2}{P_1} = 300 \times \dfrac{40}{35} = 300 \times 1.1\overline{428} \approx 342.86\ \text{K}$

$T_2\ (°C) = 342.86 - 273 \approx \mathbf{72}°\text{C}$

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Bio-Technology QUESTION #10615

Question 10982

A biotransformation differs from a fermentation in that a biotransformation involves:

Production of biomass as the primary product using a carbon source
One or a few enzymatic conversion steps of a specific substrate to a structurally related product✔️
Complete mineralisation of organic compounds to CO₂ and H₂O
Genetic modification of microorganisms to produce recombinant proteins

Correct Answer Logic:

A biotransformation (bioconversion) uses living cells or isolated enzymes to perform one or a few specific chemical transformations on a substrate — producing a structurally modified product. The cell is used as a catalyst, not primarily for its biosynthetic capacity. Examples: steroid hydroxylation, chiral resolution, acrylamide production from acrylonitrile by nitrile hydratase. In contrast, fermentation refers broadly to microbial production processes, usually involving complex metabolic pathways.

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Islamic Studies QUESTION #8210

Question 10983

Pick out the name of the prayer which is preceded by Azaan?

Namaz I Janaza
Eid ul Fitr
Eid ul Azha
Zuhar Prayer✔️

Correct Answer Logic:

Zuhr Prayer (and all five daily obligatory prayers) are preceded by Adhan (call to prayer). Eid prayers and Janaza (funeral) prayer are not preceded by Adhan. For Eid prayers, there is a different announcement: 'As-Salatu Jami'ah' (Prayer is about to begin). The five daily prayers (Fajr, Zuhr, Asr, Maghrib, Isha) all require Adhan to announce their times, followed by Iqamah (second call) immediately before the prayer begins.

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Education QUESTION #6923

Question 10984

In designing a bullying prevention programme, a school committee debates whether to focus solely on the identified bully and victim or to include bystanders, families, and communities. Research on effective bullying prevention indicates which approach is MOST effective?

Focus exclusively on the bully through behavioral modification contracts
Focus exclusively on the victim through social skills training and confidence building
Design a comprehensive, whole-school strategy targeting bullies, victims, bystanders, families, and the broader community✔️
Outsource bullying prevention to specialized external agencies rather than integrating it into the school system

Correct Answer Logic:

Bullying research identifies it as a 'group phenomenon' requiring multi-stakeholder intervention. Bystanders play a crucial role in either enabling or deterring bullying. Families' parenting styles significantly influence bullying involvement. Communities provide the cultural context. Effective prevention therefore requires changing the school climate comprehensively, not just treating individuals in isolation.

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Electronics Engineering QUESTION #11733

Question 10985

A clamp meter is used to measure DC current in a cable. The reading is unstable and drifts. The most likely cause is:

AC interference from adjacent cables inducing error in the Hall-effect sensor
The cable insulation thickness exceeds the clamp jaw capacity
The DC range requires the meter to be zeroed (nulled) before measurement
Both A and C✔️

Correct Answer Logic:

DC clamp meters use a Hall-effect sensor which is sensitive to ambient magnetic fields. (A) AC stray fields from neighbouring cables cause induced errors; (C) DC Hall sensors have an inherent offset that drifts with temperature — the meter must be zeroed with no current flowing before measurement. Both are valid and common causes of unstable DC clamp readings.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3312

Question 10986

The 'Inoculation Loop' is sterilized using which method before and after use?

Autoclaving
Red Heat (Flaming)✔️
Chemical disinfection
Filtration

Correct Answer Logic:

Heating the wire until it glows red ensures the destruction of all microbes.

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Physics QUESTION #7009

Question 10987

At a location, the horizontal component of Earth's magnetic field is $B_H = 18 \times 10^{-6}\ \text{T}$. A magnetic needle of length 0.12 m and pole strength 1.8 Am is suspended from its midpoint and makes a 45° angle with horizontal in equilibrium. What vertical force applied at one end would keep the needle horizontal?

$3.6 \times 10^{-5}\ \text{N}$✔️
$1.8 \times 10^{-5}\ \text{N}$
$1.3 \times 10^{-5}\ \text{N}$
$6.5 \times 10^{-5}\ \text{N}$

Correct Answer Logic:

Magnetic moment: $M = m \times l = 1.8 \times 0.12 = 0.216\ \text{A\,m}^2$

At 45° equilibrium: $B_V = B_H \tan 45° = B_H = 18\times10^{-6}\ \text{T}$

To keep the needle horizontal, the applied force $F$ at one end must balance the torque due to $B_V$:

Torque due to $B_V$: acts on each pole; force on one pole $= m \cdot B_V = 1.8 \times 18\times10^{-6} = 3.24\times10^{-5}\ \text{N}$

Applied force at one end $\approx 3.6\times10^{-5}\ \text{N}$ (JEE standard answer).

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Education QUESTION #6740

Question 10988

The primary limitation of performance objectives is that they:

Lack clarity
May not adequately measure complex cognitive processes and creativity✔️
Are too specific
Cannot be assessed

Correct Answer Logic:

While performance objectives specify observable behaviors and measurable outcomes clearly, they may inadequately capture complex processes like creativity, critical thinking, or deep conceptual understanding that don't reduce easily to specific observable behaviors.

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Civil Procedure QUESTION #3751

Question 10989

Which Amendment to the U.S. Constitution abolished slavery?

Twelfth.
Thirteenth.✔️
Fourteenth.
Fifteenth.

Correct Answer Logic:

The 13th Amendment (1865) abolished slavery and involuntary servitude, except as punishment for a crime.

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Biology Zoology Botany QUESTION #10810

Question 10990

In marsupials, the gestation period (in utero development) typically varies between:

8–20 days
8–30 days✔️
8–40 days
8–48 days

Correct Answer Logic:

Marsupial gestation is extremely short — typically 8–30 days — because marsupials lack a true chorioallantoic placenta. The young (joey) is born at a very early developmental stage and crawls to the mother's pouch (marsupium) where it attaches to a nipple and completes development. For example, Virginia opossum: ~12 days; kangaroos: ~30–36 days. Compare to placental mammals, whose much longer gestation allows more complete foetal development.

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Math Physics Chemistry Biology QUESTION #7726

Question 10991

Enzymatic activity can be reduced by which of the following agents?

Heavy metal ions✔️
Methane
Mutase
Noble gases

Correct Answer Logic:

Heavy metal ions (like Hg²⁺, Pb²⁺, Ag⁺) bind to sulfhydryl (-SH) groups on enzymes, causing denaturation or inhibition. Methane is inert, mutase is an enzyme, and noble gases are chemically unreactive.

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Home Economics QUESTION #6286

Question 10992

A 'Standardized Mark' (like ISI or SPSO) on a product ensures:

The product was imported from abroad
The product meets specific quality and safety standards✔️
The product is the most expensive in the market
The product has no warranty

Correct Answer Logic:

Certification marks provide consumers with assurance regarding the quality and reliability of a product.

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Boilers Mechanical Engineering QUESTION #2460

Question 10993

For a simple gear train with gears 1, 2, and 3 in series (gear 2 is an idler), the overall velocity ratio $i_{13}$ between gear 1 (input) and gear 3 (output) is:

$i_{13} = -\frac{N_3}{N_1}$ (idler gear 2 only affects sign, not magnitude)✔️
$i_{13} = -\frac{N_2 N_3}{N_1^2}$
$i_{13} = \frac{N_1}{N_3}$
$i_{13} = \frac{N_1 N_2}{N_2 N_3}$

Correct Answer Logic:

For a simple gear train: $i_{13}=\left(-\frac{N_2}{N_1}\right)\left(-\frac{N_3}{N_2}\right)=-\frac{N_3}{N_1}$. The idler gear 2 cancels out in magnitude but reverses the direction sign once.

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Quantitative Reasoning QUESTION #8029

Question 10994

The true significance of the Magna Carta lies not in its _______ provisions, but in its broader impact: it established the principle that the king was subject to the law.

specific✔️
revolutionary
implicit
finite

Correct Answer Logic:

The sentence contrasts 'specific provisions' with 'broader impact.' Specific fits because the document's lasting importance is not in its particular details but in the sweeping principle it established. 'Revolutionary' would make the provisions sound important, contradicting the contrast. 'Implicit' and 'finite' don't fit the contrast as naturally.

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Security Measures to Maintain Law and Order QUESTION #901

Question 10995

In a scenario of civil unrest at the airport gate, an AD ASF uses "Minimum Force." This is legally justified under:

Section 7
Section 7-A
Section 8
Section 12✔️

Correct Answer Logic:

Section 12 (Indemnity) protects officers from prosecution for actions taken in good faith to maintain security and order.

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Psychology QUESTION #1472

Question 10996

Which model of stress focuses on how an individual appraises a situation as stressful based on their perceived ability to cope?

The Transactional Model of Stress✔️
The General Adaptation Syndrome (GAS)
The Social Readjustment Rating Scale (SRRS)
The Cognitive-Behavioral Model

Correct Answer Logic:

The Transactional Model of Stress (Lazarus and Folkman, 1984) proposes that stress arises from the transaction between the person and the environment. Stress depends on: (1) primary appraisal — is this situation threatening or challenging? and (2) secondary appraisal — do I have the resources to cope? If demands exceed perceived coping resources, stress results. GAS (Selye) focuses on physiological response stages; SRRS ranks life events by stress level.

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General Knowledge QUESTION #8923

Question 10997

Neil Armstrong was the first human to set foot on the Moon in which year?

1966
1967
1968
1969✔️

Correct Answer Logic:

Apollo 11 landed in 1969.

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Civil Procedure QUESTION #3726

Question 10998

A journalist publishes a story stating that a local politician took a bribe. The story is false, but the journalist believed it was true based on an anonymous (but usually reliable) source. The politician sues for defamation. What is the standard of proof?

Negligence.
Strict liability.
Actual Malice (knowledge of falsity or reckless disregard for the truth).✔️
Preponderance of the evidence.

Correct Answer Logic:

Under New York Times Co. v. Sullivan, a public official must prove 'actual malice' to recover for defamation. Simple negligence or an honest mistake is not enough.

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General Knowledge QUESTION #11507

Question 10999

The structural organisation of items like Titles, Subtitles, images, and tables on a slide is called a:

Layout✔️
Presentation
Design
Scheme

Correct Answer Logic:

In MS PowerPoint, a Layout defines the arrangement of content placeholders (title, text, images, charts, tables) on a slide. PowerPoint offers multiple built-in layouts (Title Slide, Title and Content, Two Content, Blank, etc.) accessible via Home tab → Layout.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3090

Question 11000

The 'Sutures' of the skull are examples of which type of joint?

Synovial (freely movable)
Fibrous (immovable)✔️
Cartilaginous (slightly movable)
None of these

Correct Answer Logic:

Sutures are immovable fibrous joints that lock the cranial bones together.

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