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The half-reaction for oxalate is: $C_{2}O_{4}^{2-} \rightarrow 2CO_{2} + 2e^{-}$. In this process, 2 electrons are released for every two molecules of $CO_{2}$ produced. Therefore, for one molecule of $CO_{2}$, the number of electrons involved is $2/2 = 1$.

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Chemistry QUESTION #7178

Question 4487

Determine the pressure exerted by a mixture of $6.4 \text{ g}$ of methane ($CH_{4}$) and $8.8 \text{ g}$ of carbon dioxide ($CO_{2}$) confined in a $10 \text{ L}$ vessel at $27^{\circ}\text{C}$. [Use $R = 8.314 \text{ J mol}^{-1}\text{K}^{-1}$]

$125 \text{ kPa}$
$150 \text{ kPa}$✔️
$210 \text{ kPa}$
$100 \text{ kPa}$

Correct Answer Logic:

First, calculate the total moles ($n$):

Moles of $CH_{4} = 6.4 / 16 = 0.4 \text{ mol}$
Moles of $CO_{2} = 8.8 / 44 = 0.2 \text{ mol}$
Total $n = 0.6 \text{ mol}$
Using $P = \frac{nRT}{V}$:
$P = \frac{0.6 \times 8.314 \times 300}{10 \times 10^{-3} \text{ m}^{3}}$
$P \approx 149,652 \text{ Pa} \approx 150 \text{ kPa}$

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Physics QUESTION #369

Question 4488

If the mass of the bob of a pendulum is doubled its time period is:

Halved
Doubled
Unchanged✔️
Increases four times

Correct Answer Logic:

Time period of a pendulum is independent of mass

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General Science and Ability QUESTION #263

Question 4489

The heavy water is:

D₂O with simple hydrogen
H₂O with deuterium
D₂O with deuterium✔️
H₂O with simple hydrogen

Correct Answer Logic:

Heavy water (deuterium oxide) contains the hydrogen isotope deuterium (2H).

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3488

Question 4490

'Ephedrine' is an alkaloid used primarily as a:

Bronchodilator✔️
Painkiller
Antibiotic
Purgative

Correct Answer Logic:

Ephedrine is used to treat asthma and nasal congestion.

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Islamic Studies QUESTION #7900

Question 4491

What is the time of Nafil Salaa arced Ishraq?

Sunrise till midnight
Sunrise till noon✔️
Sunrise till quarter of a day
Sunrise till sunset

Correct Answer Logic:

Ishraq (Chast) prayer is offered after sunrise until before noon, specifically after the sun has risen and the forbidden time has passed (approximately 15-20 minutes after sunrise) until just before Zuhr time. It consists of 2-12 rakats and is highly rewarding.

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Civil Procedure QUESTION #3735

Question 4492

Which of the following is an 'Inchoate' crime?

Robbery.
Conspiracy.✔️
Battery.
Arson.

Correct Answer Logic:

Inchoate crimes are 'incomplete' or 'anticipatory' crimes, such as Attempt, Solicitation, and Conspiracy.

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General Knowledge QUESTION #4475

Question 4493

On June 22, 2025, US B2 Bombers and Tomahawk missiles hit Iran’s nuclear facility as part of:

Operation Inherent Resolve
Operation Resolute Support
Operation Dragon
Operation Midnight Hammer✔️

Correct Answer Logic:

No verified real-world operation; 'Midnight Hammer' appears exam-constructed.

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Disaster Management QUESTION #6524

Question 4494

What distinguishes Eco-DRR from traditional structural disaster mitigation?

Eco-DRR is less expensive
Eco-DRR uses ecosystem services to reduce disaster risks while providing co-benefits✔️
Eco-DRR only applies to flood management
Eco-DRR replaces the need for built infrastructure

Correct Answer Logic:

Section 8.2 defines Eco-DRR as restoring and conserving natural barriers (mangroves, forests, wetlands) that reduce disaster risks while maintaining environmental integrity. This provides multiple co-benefits (biodiversity, carbon sequestration, livelihoods) unlike single-purpose structural solutions.

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Chemistry QUESTION #1453

Question 4495

Which of the following has the highest dipole moment?

$\text{CO}_2$
$\text{H}_2\text{O}$✔️
$\text{CCl}_4$
None of these

Correct Answer Logic:

Dipole moment depends on both bond polarity and molecular geometry. $\text{CO}_2$ is linear — two equal and opposite C=O bond dipoles cancel → $\mu = 0$. $\text{CCl}_4$ is tetrahedral — four C–Cl dipoles cancel → $\mu = 0$. $\text{H}_2\text{O}$ is bent (V-shaped) with bond angle ~104.5° — the two O–H bond dipoles do NOT cancel, giving a net dipole moment of $\mu \approx 1.85$ D, the highest among the options.

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Chemistry QUESTION #1445

Question 4496

What is the major product when ethyl acetate is hydrolyzed under acidic conditions?

Acetic acid and ethanol✔️
Acetaldehyde and ethanol
Acetone and ethanol
None of these

Correct Answer Logic:

Acid hydrolysis (esterification in reverse) of ethyl acetate ($CH_3COOC_2H_5$) proceeds by nucleophilic acyl substitution: $CH_3COOC_2H_5 + H_2O \xrightarrow{H^+} CH_3COOH + C_2H_5OH$. The products are acetic acid (ethanoic acid) and ethanol. This is a Fischer esterification run in reverse (saponification under acidic conditions gives the acid, not the carboxylate salt).

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Sociology QUESTION #1678

Question 4497

Louis Althusser, in his structural Marxist reformulation of the theory of ideology, distinguished between 'Repressive State Apparatuses' (which operate primarily through force) and 'Ideological State Apparatuses' (which operate primarily through ideology). Which of the following correctly identifies examples of ideological rather than repressive state apparatuses?

The military, police, and prison system
Religion, education, and media — institutions that reproduce ruling-class ideology by securing the voluntary consent of the dominated✔️
The judicial system and its courts of law
Bureaucratic administrations and formal political party structures

Correct Answer Logic:

In 'Ideology and Ideological State Apparatuses' (1970), Althusser distinguishes between Repressive State Apparatuses (army, police, prisons — which operate through force) and Ideological State Apparatuses (religion, education, family, media, political parties — which operate through ideology, securing consent). Education was, for Althusser, the dominant ISA in capitalist societies.

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Accounting & Finance QUESTION #6099

Question 4498

At the end of a financial period, a business recorded: (1) Non-current assets at carrying value, (2) Current assets, (3) Non-current liabilities, (4) Current liabilities. Which formula correctly calculates capital?

1 + 2 + 3 + 4
1 - 2 - 3 + 4
1 + 2 - 3 - 4✔️
1 - 2 + 3 - 4

Correct Answer Logic:

Option C is correct: Capital = Non-current assets + Current assets − Non-current liabilities − Current liabilities

From the accounting equation: Capital = Total Assets − Total Liabilities

Total Assets = (1) + (2); Total Liabilities = (3) + (4)

Therefore: Capital = 1 + 2 − 3 − 4

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Math Physics Chemistry Biology QUESTION #4328

Question 4499

Which statement best compares cell division in prokaryotic and eukaryotic cells?

Eukaryotes divide by budding; prokaryotes by mitosis
Eukaryotes use binary fission; prokaryotes by meiosis
Eukaryotes divide by mitosis; prokaryotes by binary fission✔️
Both use mitosis

Correct Answer Logic:

Prokaryotes divide by binary fission, a simpler process without a spindle. Eukaryotes undergo mitosis (somatic cells) or meiosis (sex cells), involving a spindle apparatus and nuclear envelope.

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CISA QUESTION #1736

Question 4500

When problems are identified during an audit engagement, what is the appropriate way for the auditor to handle the remediation process?

The auditor should assume ownership of the issue and actively participate in developing a corrective action plan.
The auditor should determine the severity of the issue and then prescribe a specific solution after evaluating the business impact.
The auditor can add substantial value by defining the detailed remediation steps required to fix the problem.
The auditor must not take ownership of identified problems and should limit involvement to providing general guidance — leaving the auditee responsible for designing their own remediation plan.✔️

Correct Answer Logic:

Auditor objectivity and independence require that the auditor never become an active participant in fixing the problems they have identified. Once an auditor takes ownership of a remediation plan, they can no longer independently and objectively evaluate whether the remediation is adequate — they have effectively become part of the process they are supposed to audit. The auditor's proper role is to identify, describe, and provide general context for problems; solution design belongs to the auditee.

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