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Chemistry QUESTION #5578

Aspirin is the common name for which chemical compound?

Acetyl salicylic acid✔️
Phenyl salicylate
Acetyl salicylate
Methyl salicylic acid

Correct Answer Logic:

Aspirin is the brand name for acetylsalicylic acid (2-acetoxybenzoic acid). It is synthesized by acetylation of the –OH group of salicylic acid using acetic anhydride: $C_6H_4(OH)COOH + (CH_3CO)_2O \to C_6H_4(OCOCH_3)COOH + CH_3COOH$. It is an analgesic, antipyretic, and anti-inflammatory drug.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3403

Question 2942

'Glucagon' acts to:

Lower blood sugar
Raise blood sugar by promoting glycogenolysis✔️
Store fat
Build muscle

Correct Answer Logic:

It is the antagonist to insulin, released when blood sugar is low.

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Biomedical Sciences QUESTION #3804

Question 2943

What is the primary physiological action of antidiuretic hormone (vasopressin) in the kidneys?

To increase blood pressure, increasing formation of nephric filtrate
To cause active transport of urea and uric acid from renal blood into tubules
To inhibit aldosterone action
To cause reabsorption of water✔️

Correct Answer Logic:

Vasopressin (ADH) acts on collecting duct principal cells to increase water permeability via aquaporin-2 channels, promoting water reabsorption and reducing urine volume.

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Reading and Writing (Module-1) QUESTION #5370

Question 2944

American abstract artist Richard ______, who designs his installations to make people aware of how their movement is influenced by their environment, constructs massive steel sculptures that take over outdoor areas. Which choice completes the text so that it conforms to the conventions of Standard English?

Serra is intending
Serra, intends
Serra, intending
Serra intends✔️

Correct Answer Logic:

The name 'Richard Serra' is the subject, and 'intends' is the main verb of the sentence.

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Mathematics QUESTION #1290

Question 2945

The limit $\lim_{x\to\pi/2}(1+\cos x)^{\tan x}$ equals:

1✔️
$e$
$e^{-1}$
$0$

Correct Answer Logic:

As $x\to\pi/2$: $\cos x\to0^-$ and $\tan x\to-\infty$. Let $L=\lim(1+\cos x)^{\tan x}$. Take $\ln$: $\ln L=\lim\tan x\cdot\ln(1+\cos x)$. As $x\to\pi/2$, let $u=x-\pi/2\to0$: $\cos x=-\sin u\approx-u$ and $\tan x=\cot(-u)\approx-1/u$. So $\ln L\approx(-1/u)\ln(1-u)\approx(-1/u)(-u)=1$. Thus $L=e^1=e$. Wait: $\ln(1+\cos x)\approx\ln(1-u)\approx-u$; $\tan x\approx-\frac{1}{u}$. Product: $(-\frac{1}{u})(-u)=1$. So $L=e^1=e$. Hmm but let me check sign: as $x\to(\pi/2)^-$, $\tan x\to+\infty$ and $\cos x\to0^+$. $\tan x\cdot\ln(1+\cos x)\approx(+\infty)\cdot\ln(1)\to$ indeterminate. Using L'Hopital: $\to0\cdot\infty$. Limit $=1\Rightarrow L=e$. But also as $x\to(\pi/2)^+$: $\tan x\to-\infty$, $\cos x\to0^-$, base becomes negative — not real. So limit from left: $L=e$. But answer (A) says 1 and answer (B) says e — this is option (B)=e... re-indexing: option 0=(A)=1, option 1=(B)=e. Correct answer is $e$ = index 1.

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English QUESTION #2685

Question 2946

Which modal verb expresses 'ability'? 'I ___ speak three languages fluently.'

must
can✔️
should
may

Correct Answer Logic:

'Can' is used to express physical or mental ability.

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Therapeutics and Patient Care QUESTION #3909

Question 2947

Which symptom cluster is most typically associated with left-sided cardiac failure due to pulmonary congestion?

Jugular venous distension and shortness of breath
Hepatojugular reflux and abdominal distension
Paroxysmal nocturnal dyspnoea and hepatojugular reflux
Shortness of breath and paroxysmal nocturnal dyspnoea✔️

Correct Answer Logic:

Left heart failure causes pulmonary congestion with symptoms of shortness of breath, orthopnoea, and paroxysmal nocturnal dyspnoea. Jugular venous distension and hepatojugular reflux are signs of right heart failure.

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Physics QUESTION #984

Question 2948

The torque due to the force $(2\hat{i}+\hat{j}+2\hat{k})$ about the origin, acting on a particle whose position vector is $(\hat{i}+\hat{j}+\hat{k})$, would be:

$\hat{i}-\hat{k}$✔️
$\hat{i}+\hat{k}$
$\hat{j}+\hat{k}$
$\hat{i}-\hat{j}+\hat{k}$

Correct Answer Logic:

$\vec{\tau} = \vec{r}\times\vec{F} = (\hat{i}+\hat{j}+\hat{k})\times(2\hat{i}+\hat{j}+2\hat{k})$. Computing the determinant: $\hat{i}(1\cdot2-1\cdot1)-\hat{j}(1\cdot2-1\cdot2)+\hat{k}(1\cdot1-1\cdot2) = \hat{i}(1)-\hat{j}(0)+\hat{k}(-1) = \hat{i}-\hat{k}$.

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Security Measures to Maintain Law and Order QUESTION #857

Question 2949

Under Section 12, "Good Faith" is a defense. An act is NOT in good faith if it is done with:

Speed
Malice or Negligence✔️
Proper authority
Fear

Correct Answer Logic:

Indemnity does not protect an officer if it is proven the action was taken with "Malafide" (bad intent) or gross negligence.

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CISA QUESTION #1747

Question 2950

During an audit of a BPR project, which area would represent the greatest concern?

The steering committee approves sufficient controls for fraud detection
Planning methods include PERT techniques
Risk management planning aligns the project with business objectives✔️
Vendor participation, documentation, installation support, and training

Correct Answer Logic:

Risk management planning is the highest concern during a BPR audit because it determines whether the project can actually fulfill business objectives and whether the organization has the capacity to complete the project and achieve desired outcomes.

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Statistics QUESTION #1976

Question 2951

For a frequency distribution, the first three raw moments about $x = 0$ given that $\mu_1' = 1$, $\mu_2' = 16$, $\mu_3' = -40$ are about $a=2$. The second raw moment about $x=0$ is:

$15$
$16$
$24$✔️
$18$

Correct Answer Logic:

Second raw moment about zero: $\nu_2 = \mu_2' + a^2 + 2a\mu_1' = 16 + 4 + 2(2)(1) = 24$. Alternatively using $\nu_2 = \mu_2 + \bar{x}^2 = 15 + 9 = 24$, confirming the answer.

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Boilers Mechanical Engineering QUESTION #4070

Question 2952

'Steam-to-Fuel' ratio of $10:1$ means:

$10~kg$ of steam is produced for every $1~kg$ of fuel burnt✔️
$10~kg$ of fuel for $1~kg$ of steam
The boiler is $10\%$ efficient
The pressure is $10~bar$

Correct Answer Logic:

A key performance indicator (KPI) for boiler operators.

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General Knowledge QUESTION #2633

Question 2953

A FACTORY RESET on a device results in:

Installing new software updates and the latest operating system version
Resetting the device to the settings it came with from the factory, erasing all user data✔️
Increasing the device's processing speed by clearing temporary files only
Connecting the device to a new network and user account

Correct Answer Logic:

A factory reset resets a device to the settings it came with from the factory. This erases all user data, installed applications, settings, and personal files, returning the device to its original out-of-the-box state. It is commonly used to troubleshoot serious issues or prepare a device for a new user.

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Biology Zoology Botany QUESTION #1374

Question 2954

The cell wall of fungi is primarily composed of:

Cellulose
Chitin✔️
Pectin
Lignin

Correct Answer Logic:

The cell wall of fungi is primarily composed of chitin — a nitrogen-containing polysaccharide made of N-acetylglucosamine units linked by β-1,4-glycosidic bonds. This is a key distinguishing feature of fungi from plants (whose cell walls contain cellulose). Chitin provides structural strength and rigidity to the fungal cell wall.

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Islamic Studies QUESTION #632

Question 2955

The basic obligatory action of Hajj is:

Wuquf-e-Arafat✔️
Rami
Tawaf-e-Ziyarat
None of these

Correct Answer Logic:

Wuquf (standing) at Arafat is the most essential pillar of Hajj.

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Chemistry QUESTION #5529

Question 2956

Kinetic data for $2A + B \to \text{Products}$: Exp I: [A]=0.10, [B]=0.20, rate=$6.93\times10^{-3}$; Exp II: [A]=0.10, [B]=0.25, rate=$6.93\times10^{-3}$; Exp III: [A]=0.20, [B]=0.30, rate=$1.386\times10^{-2}\ \text{mol L}^{-1}\text{min}^{-1}$. Find the half-life (in minutes) for reactant A.

5
10
1
100✔️

Correct Answer Logic:

Comparing Exp I and II: [B] changes but rate is constant → order w.r.t. B = 0. Comparing Exp I and III: [A] doubles (0.10→0.20) and rate doubles → order w.r.t. A = 1. Rate law: $r = k[A]$. From Exp I: $k = \frac{6.93\times10^{-3}}{0.10} = 6.93\times10^{-2}\ \text{min}^{-1}$. Half-life: $t_{1/2} = \frac{0.693}{k} = \frac{0.693}{6.93\times10^{-2}} = 10\ \text{min}$.

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English QUESTION #675

Question 2957

In "King Lear," who is the loyal daughter of the King?

Goneril
Regan
Cordelia✔️
Goneril and Regan

Correct Answer Logic:

Cordelia is the youngest and only loyal daughter, who refuses to flatter her father for land.

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Library Sciences QUESTION #1525

Question 2958

In evaluating reference sources, 'currency' refers to:

The monetary cost of purchasing the source
The up-to-dateness of the information and the recentness of the publication or revision✔️
The popularity of the source among users
The language in which the source is published

Correct Answer Logic:

Currency as an evaluation criterion refers to how up-to-date the information is — including the publication or revision date and whether rapidly changing data (such as statistics or contact information) has been recently updated.

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