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Chemistry QUESTION #5530

For $2A + B \to \text{products}$: doubling both [A] and [B] increases rate from $0.3$ to $2.4\ \text{mol L}^{-1}\text{s}^{-1}$; doubling [A] alone increases rate from $0.3$ to $0.6\ \text{mol L}^{-1}\text{s}^{-1}$. Which statement is correct?

Total order of the reaction is 4
Order w.r.t. B is 2✔️
Order w.r.t. B is 1
Order w.r.t. A is 2

Correct Answer Logic:

When only [A] doubles: rate doubles → order w.r.t. A = 1. When both [A] and [B] double: rate increases 8-fold ($2.4/0.3 = 8$). Effect of doubling both: $2^1 \times 2^n = 8 \Rightarrow 2^{1+n} = 8 = 2^3 \Rightarrow 1+n = 3 \Rightarrow n = 2$. Order w.r.t. B = 2. Total order = 1 + 2 = 3.

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Nursing QUESTION #9279

Question 1622

A 6-week-old infant is found unresponsive in the crib. Resuscitation is attempted but unsuccessful. The parents are told the cause is 'Sudden Infant Death Syndrome (SIDS)'. Which statement about SIDS risk reduction is MOST evidence-based?

Placing infant prone (tummy sleeping) to prevent aspiration
Sleeping on soft mattress with pillows to prevent head trauma
Supine sleeping position (Back to Sleep), firm mattress, room-sharing without bed-sharing, avoiding smoking exposure✔️
Bundling infant tightly (swaddling arms-in) is the primary prevention

Correct Answer Logic:

Sudden Infant Death Syndrome (SIDS) — sudden, unexplained death of an infant under 1 year during sleep, remaining unexplained after thorough investigation.

Peak age: 2–4 months. Rare after 6 months.

Evidence-based SIDS Prevention (AAP Safe Sleep Guidelines 2022):

Recommendation	Evidence Level
Supine (back) sleeping position — always	Strongest evidence — reduces SIDS by ~50%
Firm, flat sleep surface (crib/bassinet)	Strong — no soft mattresses, pillows, bumpers
Room-sharing (parent's room) WITHOUT bed-sharing	Strong — bed-sharing increases risk
Avoid smoke exposure (prenatal + postnatal)	Strong — smoking is major modifiable risk factor
Avoid overheating	Moderate — keep room 20–22°C
Breastfeeding	Moderate — protective effect
Pacifier use at sleep (after BF established)	Moderate — protective

Prone sleeping increases SIDS risk 3–9 fold. The 'Back to Sleep' campaign reduced SIDS deaths by >50% since 1992.

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Nursing QUESTION #9152

Question 1623

In epidemiology, the Attack Rate formula is:
Which formula correctly represents the attack rate?

\\frac{\\text{New cases in a period}}{\\text{Population at start of period}} \\times 100
\\frac{\\text{Ill persons among exposed}}{\\text{Total exposed persons}} \\times 100✔️
\\frac{\\text{Total cases}}{\\text{Total population}} \\times 1000
\\frac{\\text{Deaths due to disease}}{\\text{Total cases of disease}} \\times 100

Correct Answer Logic:

The Attack Rate is used during outbreaks/epidemics to measure the proportion of exposed individuals who develop the disease:

\\text{Attack Rate} = \\frac{\\text{Number of ill persons among exposed}}{\\text{Total number of exposed persons}} \\times 100

Option 1 describes Incidence Rate
Option 3 describes Prevalence Rate
Option 4 describes Case Fatality Rate (CFR)

Understanding attack rates is essential during disease outbreak management — a core Head Nurse responsibility in community settings.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3314

Question 1624

The 'Minimum Inhibitory Concentration' (MIC) is defined as the:

Lowest dose of a drug that kills the patient
Lowest concentration of an antibiotic that prevents visible growth of a microbe✔️
Maximum dose allowed
Concentration of bacteria in a sample

Correct Answer Logic:

MIC is a key measure of the potency of an antimicrobial agent.

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Quantitative Reasoning QUESTION #8033

Question 1625

MUTTER : INDISTINCT :: (Find the pair that best matches the relationship between the given words)

demand : obedient
plead : obligatory
flatter : commendable
drone : monotonous✔️

Correct Answer Logic:

To MUTTER is to speak in an INDISTINCT (unclear) way — the verb describes speech characterized by that adjective. Similarly, to drone is to speak in a monotonous (dull, repetitive) way. Both pairs = [verb for a way of speaking] : [adjective describing that speech]. The other pairs don't follow this verb-defines-manner pattern.

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General Abilities QUESTION #4562

Question 1626

What is the reciprocal of $\frac{5}{7}$?

$\frac{-5}{7}$
$\frac{7}{5}$✔️
$\frac{5}{7}$
$\frac{1}{35}$

Correct Answer Logic:

Reciprocal of $\frac{a}{b}$ is $\frac{b}{a}$. So reciprocal of $\frac{5}{7}$ is $\frac{7}{5}$

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General Knowledge QUESTION #279

Question 1627

Who wrote "The United States and the Turmoil in Afghanistan and Pakistan"?

Ahmed Rashid
Sarah Chayes
Andrew Exum
None of these✔️

Correct Answer Logic:

The book was written by Humsun Panar in 2012; none of the listed authors are correct.+2

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English QUESTION #8573

Question 1628

What does the idiom 'to husband one's resources' mean?

to manage one's means with frugality✔️
to hand over everything to husband
to take household expenses from husband
to leave all affairs to life partner

Correct Answer Logic:

'Husband' as a verb means to manage resources carefully.

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Physics QUESTION #7849

Question 1629

Electron in hydrogen jumps from n=2 to n=1. Wavelength of emitted radiation:

4/3R_H
3/4R_H✔️
R_H
4R_H

Correct Answer Logic:

1/λ = R_H(1/1² - 1/2²)=R_H(1-1/4)=3R_H/4 ⇒ λ = 4/(3R_H).

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Islamic Studies QUESTION #8204

Question 1630

In which Para of the Holy Quran, Surah Momin is located?

24✔️
26
28
18

Correct Answer Logic:

Surah Al-Mu'min (also called Surah Ghafir) is located in Para 24 of the Holy Quran. It is the 40th Surah with 85 verses. This Makki Surah emphasizes Allah's forgiveness, the Day of Judgment, and tells the story of a believer from Pharaoh's family who defended Prophet Musa (AS). The Surah warns against arrogance and disbelief while promising mercy to those who repent and believe.

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Law QUESTION #9668

Question 1631

Under Article 2(9), when one fact is declared 'conclusive proof' of another, the Court:

May allow rebuttal evidence
Shall regard the other fact as proved and shall NOT allow evidence to disprove it✔️
May at its discretion allow contradictory evidence
Shall seek corroboration before accepting it

Correct Answer Logic:

Article 2(9) states that when one fact is conclusive proof of another, the Court shall regard the other as proved and shall NOT allow evidence to be given for the purpose of disproving it.

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Physics QUESTION #409

Question 1632

A pipe varies uniformly in diameter from 2 m to 4 m. An incompressible fluid enters the pipe with velocity 16m/sec. What is velocity of fluid when it leaves the pipe?

64 m/sec
32 m/sec
8 m/sec
4 m/sec✔️

Correct Answer Logic:

Using continuity equation: A?v? = A?v?

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General Knowledge QUESTION #8608

Question 1633

The Eiffel Tower is located in which country?

France✔️
Germany
Italy
Australia

Correct Answer Logic:

The Eiffel Tower is in Paris, France.

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General Knowledge QUESTION #8957

Question 1634

'Order of the Cloud and Banner' is the most prestigious military award of which country?

Japan
China✔️
India
South Korea

Correct Answer Logic:

China's Order of the Cloud and Banner is a military award.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3369

Question 1635

Which part of the microscope controls the 'Amount of Light' reaching the specimen?

Eyepiece
Objective lens
Iris Diaphragm✔️
Focus knob

Correct Answer Logic:

Adjusting the diaphragm improves contrast and clarity.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3628

Question 1636

The 'Unani' system of medicine was developed by:

Chinese
Greeks (and furthered by Arabs/Persians)✔️
Indians
Americans

Correct Answer Logic:

Unani is based on the teachings of Hippocrates and Galen.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3582

Question 1637

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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English QUESTION #8347

Question 1638

A poor man _______ nursed the orphan.

who✔️
whom
that
None of these

Correct Answer Logic:

'Who' is the subject pronoun.

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Urdu QUESTION #5298

Question 1639

'شاید' کس کا شعری مجموعہ ہے؟

وصی شاہ
عباس تابش
جون ایلیا✔️
حسن عباسی

Correct Answer Logic:

شاید جون ایلیا کا معروف شعری مجموعہ ہے جو ان کی مخصوص شاعرانہ فکر کا حامل ہے۔

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Chemistry QUESTION #5531

Question 1640

For a reaction obeying the Arrhenius equation in the range $0°C < T < 300°C$: Plot I shows $k$ vs $E_a$ (decreasing curve), Plot II shows $k$ vs $T(°C)$ (increasing curve). Choose the correct option.

I is right but II is wrong
Both I and II are correct✔️
I is wrong but II is right
Both I and II are wrong

Correct Answer Logic:

From Arrhenius equation: $k = Ae^{-E_a/RT}$. As $E_a$ increases (at constant T), $k$ decreases — Plot I (k vs $E_a$ as a decreasing curve) is correct. As T increases (at constant $E_a$), $k$ increases exponentially — Plot II (k vs T as an increasing curve) is correct. Both plots are correct representations.

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