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Chemistry QUESTION #1075

The oxidation states of the underlined elements in $\underline{\text{K}}\text{O}_2$, $\text{H}_2\underline{\text{O}}_2$ and $\text{H}_2\underline{\text{S}}\text{O}_4$ are respectively:

$+1, -2,$ and $+4$
$+4, -4,$ and $+6$
$+1, -1,$ and $+6$✔️
$+2, -2,$ and $+6$

Correct Answer Logic:

In KO$_2$ (potassium superoxide): K is +1, O$_2^-$ so O is $-\frac{1}{2}$... but underlined is K: $+1$. In H$_2$O$_2$: underlined O has oxidation state $-1$. In H$_2$SO$_4$: underlined S has oxidation state $+6$. So the answer is $+1, -1, +6$.

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Physics QUESTION #397

Question 2

100 joules work has been done by an agency in 10 seconds. What is power of agency?

1000 watt
100
10 watt✔️
0.10 watt

Correct Answer Logic:

Power = Work/Time = 100/10 = 10 watts

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Islamic Studies QUESTION #7923

Question 3

How many Ayat-e-Sejada are in the Holy Quran?

14✔️
16
12 to 7
7

Correct Answer Logic:

There are 14 verses of prostration (Ayat al-Sajdah) in the Holy Quran. When these verses are recited or heard, it is obligatory or recommended to perform a prostration (Sajdah Tilawah). These verses are found in Surahs: Al-A'raf, Ar-Ra'd, An-Nahl, Al-Isra, Maryam, Al-Hajj (2 places), Al-Furqan, An-Naml, As-Sajdah, Fussilat, An-Najm, Al-Inshiqaq, and Al-Alaq.

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Math Physics Chemistry Biology QUESTION #11317

Question 4

Which of the following is a dominant gene?

A✔️
B
C
D

Correct Answer Logic:

Gene A is an example of a dominant gene.

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Maths QUESTION #4593

Question 5

Expand: $(x + 3)(x + 2)$

$x^2 + 5x + 6$✔️
$x^2 + 6$
$2x + 5$
$x^2 + 3x + 2$

Correct Answer Logic:

$(x+3)(x+2) = x^2 + 2x + 3x + 6 = x^2 + 5x + 6$

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Chemistry QUESTION #459

Question 6

CaO forms fertilize slag by reacting with

P?O?
Fe?O?
Silica✔️
FO

Correct Answer Logic:

CaO + SiO? ? CaSiO? (slag)

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MBBS QUESTION #10364

Question 7

Allopurinol, commonly used in the long-term management of gout, lowers uric acid production by inhibiting which enzyme?

Hypoxanthine-guanine phosphoribosyltransferase (HGPRT)
Xanthine oxidase✔️
Adenosine deaminase
Phosphoribosyl pyrophosphate (PRPP) synthetase

Correct Answer Logic:

Xanthine oxidase catalyzes the final steps of purine catabolism (hypoxanthine to xanthine to uric acid); allopurinol (and its active metabolite oxypurinol) inhibits this enzyme, reducing uric acid production and shifting excretion toward the more soluble precursors hypoxanthine and xanthine.

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Urdu QUESTION #1400

Question 8

شہرِ آشوب کس نوعِ صنف کی شاعری ہے؟

معاشرتی بدحالی✔️
قومی ترقی
ہجر و فراق
عشق و محبت

Correct Answer Logic:

شہرِ آشوب ایک ایسی شعری صنف ہے جس میں کسی شہر یا معاشرے کی تباہی، بربادی، اور معاشرتی بدحالی کو بیان کیا جاتا ہے۔ اس میں مختلف پیشوں سے تعلق رکھنے والے لوگوں کی تنزلی اور زوال کا ذکر ہوتا ہے۔ میر تقی میر اور سودا اس صنف کے نمایاں شعرا ہیں۔

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Nursing QUESTION #9257

Question 9

A nurse is preparing to administer the pentavalent vaccine to a 6-week-old infant as per Pakistan's Expanded Programme on Immunization (EPI) schedule. The pentavalent vaccine protects against which combination of diseases?

Diphtheria, Tetanus, Pertussis, Polio, Measles
Diphtheria, Tetanus, Pertussis, Hepatitis B, Haemophilus influenzae type b (Hib)✔️
Tuberculosis, Polio, Tetanus, Hepatitis B, Measles
Diphtheria, Tetanus, Pertussis, Pneumococcal, Rotavirus

Correct Answer Logic:

Pakistan EPI Schedule (current):

Age	Vaccines
Birth	BCG, OPV-0, Hepatitis B (birth dose)
6 weeks	Pentavalent (DTP-HepB-Hib), OPV-1, PCV-1, Rotavirus-1, IPV-1
10 weeks	Pentavalent-2, OPV-2, PCV-2, Rotavirus-2
14 weeks	Pentavalent-3, OPV-3, PCV-3, IPV-2
9 months	Measles-1, Vitamin A (1st dose)
15 months	Measles-2 (MMR)

Pentavalent vaccine = 5-in-1 vaccine protecting against:

Diphtheria
Tetanus
Pertussis (whooping cough)
Hep B (Hepatitis B)
Hib (Haemophilus influenzae type b)

Contraindications: Previous anaphylaxis to vaccine component, progressive neurological disorder (for pertussis component), severe febrile illness (defer, not contraindicate).

Cold chain: Pentavalent stored at $2{-}8°C$; never frozen (freeze-sensitive).

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Dairy Food Science and Technology QUESTION #5878

Question 10

Bactofugation removes bacteria from milk using:

Microfiltration membranes
High-speed centrifugation exploiting density difference between bacteria $(\rho \approx 1.1\;\text{g/mL})$ and milk $(\rho \approx 1.032\;\text{g/mL})$✔️
UV irradiation
Chemical bacteriostats

Correct Answer Logic:

Bactofugation uses centrifugal separators rotating at $\approx 20{,}000$ rpm. Bacteria $(\rho \approx 1.1\;\text{g/mL})$ are denser than milk $(\rho \approx 1.032\;\text{g/mL})$ and are sedimented as a concentrate, reducing spore count by up to $99\%$.

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Security Measures to Maintain Law and Order QUESTION #7681

Question 11

What is the primary purpose of the Security Force?

Protection of the buildings and individuals inside✔️
Protocol for civilian individuals
To cause violence
All of these

Correct Answer Logic:

The primary purpose of security forces, particularly specialized units like ASF, is to protect buildings, infrastructure, and individuals inside from threats. They provide physical security, access control, and emergency response to ensure safety and security.

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Biomedical Sciences QUESTION #3813

Question 12

Men with type 2 diabetes are at a significantly greater risk of developing which of the following complications?

Renal stenosis
Macular depigmentation
Testicular cancer
Erectile dysfunction✔️

Correct Answer Logic:

Erectile dysfunction is a well-recognised complication of diabetes in men, caused by autonomic neuropathy, endothelial dysfunction, and reduced nitric oxide synthesis affecting penile vascular response.

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Social Studies QUESTION #10025

Question 13

Socially and culturally assigned expectations attached to being male or female are referred to as:

Societal Role
Sex Role
Gender Role✔️
Gender Mainstreaming

Correct Answer Logic:

'Gender Role' describes the social and cultural expectations tied to being male or female.

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Geography QUESTION #6323

Question 14

In medical geography, the distance-decay effect on healthcare utilization suggests that:

Disease prevalence decreases with distance from pollution sources
Healthcare facility usage decreases as patient distance from facility increases✔️
Epidemic spread slows with distance from origin
Healthcare quality declines in remote areas

Correct Answer Logic:

Distance-decay in healthcare access describes the inverse relationship between distance and utilization: people are less likely to use healthcare facilities as distance increases, even controlling for need. This reflects travel costs, time, and effort creating a friction of distance.

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English Literature QUESTION #10741

Question 15

The Golden Breath is a __________ by Mulk Raj Anand.

Novel
Short Story✔️
Play
Work of Literary Criticism

Correct Answer Logic:

The Golden Breath is a collection of short stories by Mulk Raj Anand, one of the pioneering Indo-Anglian fiction writers. Anand is best known for his progressive social novels like Untouchable (1935) and Coolie (1936), which dealt with poverty and caste discrimination. His short fiction is collected in several volumes including The Golden Breath.

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Chemistry QUESTION #4372

Question 16

What is the general requirement for free radical substitution reaction of ethane and halogen?

Low pressure
Low temperature
High pressure
Heat and UV light✔️

Correct Answer Logic:

Free radical substitution (e.g., $C_2H_6 + Cl_2 \xrightarrow{h\nu} C_2H_5Cl + HCl$) requires initiation by UV light or heat to generate free radicals by homolytic cleavage of the halogen molecule.

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Maths QUESTION #4492

Question 17

What is the prime factorization of $48$?

$2^3 \times 3$
$2^4 \times 3$✔️
$2^2 \times 12$
$6 \times 8$

Correct Answer Logic:

$48 = 2 \times 24 = 2 \times 2 \times 12 = 2 \times 2 \times 2 \times 6 = 2 \times 2 \times 2 \times 2 \times 3 = 2^4 \times 3$

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Reading and Writing (Module-1) QUESTION #10487

Question 18

The senator's ------- stance on trade policy ------- depending on which regional audience she was addressing that week.

consistent . . remained
vacillating . . shifted✔️
firm . . stayed
unwavering . . held

Correct Answer Logic:

A stance that changes with the audience is 'vacillating,' and it 'shifted' accordingly.

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Information Technology QUESTION #1144

Question 19

Which protocol is used to map an IP address to a physical (MAC) address?

DNS
DHCP
ARP✔️
ICMP

Correct Answer Logic:

Address Resolution Protocol (ARP) is used to discover the hardware address of a device when only its IP address is known.

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Agronomy QUESTION #2108

Question 20

Agroecology as a scientific discipline and practice differs from conventional agronomy in that:

Agroecology advocates for higher synthetic input use to maximize ecosystem services
Agroecology applies ecological concepts and principles to the design and management of agricultural systems — emphasizing biodiversity, nutrient cycling, biological regulation of pests, and ecosystem resilience over external input-driven production, while also addressing social equity and food sovereignty dimensions✔️
Agroecology is exclusively applicable to subsistence farming systems in developing countries
Agroecology rejects all scientific research and relies entirely on traditional indigenous knowledge

Correct Answer Logic:

Agroecology (Altieri, Gliessman) integrates ecology, agronomy, and social sciences to design farming systems that mimic natural ecosystem functioning — maximizing internal biological processes (BNF, natural pest regulation, nutrient cycling through diversity) to reduce dependence on external inputs. It spans three dimensions: science (ecological principles), practice (farming methods), and movement (food systems transformation and farmer empowerment).

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