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Chemistry QUESTION #7517

A metal oxide has the formula M$_{0.98}$O. The metal M exists as M$^{2+}$ and M$^{3+}$ ions. What fraction of the metal exists as M$^{3+}$?

7.01%
4.08%✔️
6.05%
5.08%

Correct Answer Logic:

Let $x$ = fraction of M as M$^{3+}$, $(0.98 - x)$ = fraction as M$^{2+}$.

Charge balance (O$^{2-}$ contributes $-2$): $2(0.98-x) + 3x = 2$

$1.96 - 2x + 3x = 2$

$x = 0.04$

Fraction of M as M$^{3+}$ $= \dfrac{0.04}{0.98} \times 100 \approx \mathbf{4.08\%}$

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3375

Question 4402

'Benedict’s Test' is used to detect the presence of:

Non-reducing sugars
Reducing sugars✔️
Proteins
Lipids

Correct Answer Logic:

Reducing sugars (like glucose) reduce cupric ions to cuprous oxide, forming a brick-red precipitate.

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General Knowledge QUESTION #8924

Question 4403

The highest score in the history of one-day international cricket (team innings) is:

440
443✔️
448
450

Correct Answer Logic:

England scored 444 in 2022? But 443 is also high. Key says 443.

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MCQs Section QUESTION #5034

Question 4404

حیاتِ سعدی کی صنف کیا ہے؟

نظم
ناول
افسانہ
سوانح عمری✔️

Correct Answer Logic:

حیاتِ سعدی مولانا الطاف حسین حالی کی تصنیف ہے اور یہ سوانح عمری کی صنف سے تعلق رکھتی ہے۔

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General Knowledge QUESTION #8626

Question 4405

Between which two countries is the Dead Sea located?

Israel and Jordan✔️
Turkey and Greece
England and France
Sudan and South Yemen

Correct Answer Logic:

The Dead Sea lies between Israel and Jordan.

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Planning QUESTION #5003

Question 4406

Which planning theory emphasizes the role of power relationships and advocacy for marginalized groups?

Rational Comprehensive Planning
Equity Planning✔️
Systems Planning
Blueprint Planning

Correct Answer Logic:

Equity Planning, developed by Norman Krumholz and colleagues in Cleveland (1970s), explicitly addresses power imbalances and advocates for disadvantaged groups, ensuring planning benefits the poor and marginalized rather than just serving growth or efficiency goals.

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Geography QUESTION #6309

Question 4407

In diffusion of innovation theory, which adopter category represents the critical mass for widespread acceptance?

Innovators (2.5%)
Early Adopters (13.5%)
Early Majority (34%)✔️
Late Majority (34%)

Correct Answer Logic:

The Early Majority (34%) represents the critical mass or 'tipping point' in Rogers' diffusion model. Once this pragmatic group adopts an innovation, widespread acceptance becomes inevitable. They adopt just before the average member of society.

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Math Physics Chemistry Biology QUESTION #7741

Question 4408

What surrounds the muscle fibre (muscle cell) in skeletal muscle?

Cytoplasm
Lacunae
Myofibrils
Sarcoplasm✔️

Correct Answer Logic:

The cytoplasm of a muscle cell is called sarcoplasm. It contains myofibrils, organelles, and glycogen stores. Lacunae are in bone/cartilage.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3349

Question 4409

'Phage' (Bacteriophage) is a:

Type of bacteria
Virus that infects bacteria✔️
Type of fungus
Chemical disinfectant

Correct Answer Logic:

Phages are used in research and sometimes as an alternative to antibiotics.

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Social Studies QUESTION #10059

Question 4410

A post-marital residence pattern that allows a couple to live with either the husband's or the wife's family is called:

Bilocal residence
Neolocal
Ambilocal✔️
None of these

Correct Answer Logic:

Ambilocal residence gives couples the choice of residing with either spouse's family.

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Mathematics QUESTION #4118

Question 4411

Which IS a valid basis for the subspace of symmetric $2 \times 2$ matrices?

$\left\{\begin{pmatrix} 1 & 0 \ 0 & 0 \end{pmatrix}, \begin{pmatrix} 0 & 0 \ 0 & 1 \end{pmatrix}\right\}$
$\left\{\begin{pmatrix} 1 & 1 \ 1 & 0 \end{pmatrix}, \begin{pmatrix} 0 & 1 \ 1 & 1 \end{pmatrix}, \begin{pmatrix} 1 & 0 \ 0 & 1 \end{pmatrix}\right\}$
$\left\{\begin{pmatrix} 1 & 0 \ 0 & 0 \end{pmatrix}, \begin{pmatrix} 0 & 1 \ 1 & 0 \end{pmatrix}, \begin{pmatrix} 0 & 0 \ 0 & 1 \end{pmatrix}\right\}$✔️
$\left\{\begin{pmatrix} 1 & 1 \ 0 & 0 \end{pmatrix}, \begin{pmatrix} 0 & 0 \ 1 & 1 \end{pmatrix}, \begin{pmatrix} 1 & 0 \ 0 & 1 \end{pmatrix}\right\}$

Correct Answer Logic:

Option C gives standard basis for symmetric matrices. Option A has only 2 matrices (dimension 3 needed). Option B matrices are linearly dependent. Option D contains non-symmetric matrices.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3326

Question 4412

The enzyme 'Carbonic Anhydrase' is crucial in microbiology for:

Staining bacteria
Metabolism and $CO_2$ transport✔️
Sterilization
Building cell walls

Correct Answer Logic:

It catalyzes the reversible reaction between $CO_2$ and water.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3439

Question 4413

The 'Primary Structure' of a protein is determined by the:

Sequence of amino acids✔️
Alpha helices
Beta sheets
Disulfide bonds

Correct Answer Logic:

This sequence is coded by the DNA.

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Math Physics Chemistry Biology QUESTION #523

Question 4414

Syphilis is caused by

Neisseria gonorrhoeae
Cats worm
Treponema pallidum✔️
Herpes simplex

Correct Answer Logic:

Treponema pallidum causes syphilis

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Electrical Engineering QUESTION #2188

Question 4415

For an FM signal with carrier $f_c = 100\,\text{MHz}$, modulating frequency $f_m = 10\,\text{kHz}$, and peak frequency deviation $\Delta f = 75\,\text{kHz}$, the modulation index $\beta$ and Carson's rule bandwidth are:

$\beta = 7.5$, $BW = 170\,\text{kHz}$✔️
$\beta = 7.5$, $BW = 150\,\text{kHz}$
$\beta = 0.133$, $BW = 20\,\text{kHz}$
$\beta = 7.5$, $BW = 75\,\text{kHz}$

Correct Answer Logic:

$\beta = \Delta f/f_m = 75/10 = 7.5$. Carson's rule: $BW = 2(\Delta f + f_m) = 2(75+10) = 2\times85 = 170\,\text{kHz}$.

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Islamic Studies QUESTION #7896

Question 4416

How many times has the word 'Qul' been repeated in the Holy Quran?

332✔️
432
532
632

Correct Answer Logic:

The word 'Qul' (Say) appears 332 times in the Holy Quran. This imperative verb is used to command the Prophet (PBUH) to convey Allah's message to people. Many Surahs begin with 'Qul,' such as Surah Al-Ikhlas, Surah Al-Falaq, and Surah An-Nas.

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Therapeutics and Patient Care QUESTION #3893

Question 4417

Which of the following statements about the management of gout is INCORRECT?

Allopurinol should not be used to treat acute attacks
Thiazide diuretics can precipitate gout
Paracetamol is the preferred medication for an acute attack✔️
A common side-effect of colchicine is diarrhoea

Correct Answer Logic:

Paracetamol has no anti-inflammatory activity and is not the preferred treatment for acute gout. NSAIDs, colchicine, or corticosteroids are first-line options for acute gout attacks.

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Nursing QUESTION #9175

Question 4418

A community health nurse calculates the Crude Birth Rate (CBR) of a district. The correct formula is:
\\text{CBR} = ?

\\frac{\\text{Number of live births}}{\\text{Mid-year population}} \\times 1000✔️
\\frac{\\text{Number of live births}}{\\text{Number of women aged 15-49}} \\times 1000
\\frac{\\text{Total deaths}}{\\text{Mid-year population}} \\times 1000
\\frac{\\text{Number of live births}}{\\text{Total births including stillbirths}} \\times 1000

Correct Answer Logic:

The Crude Birth Rate (CBR) is calculated as:

\\text{CBR} = \\frac{\\text{Number of live births in a year}}{\\text{Mid-year total population}} \\times 1000

It is expressed per 1,000 population. Pakistan's CBR is approximately 26–28 per 1,000 population.

Comparison with other fertility measures:

General Fertility Rate (GFR) uses women aged 15–49 as denominator
Total Fertility Rate (TFR) is the average number of children a woman would have in her lifetime
Option 3 is the formula for Crude Death Rate (CDR)

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Chemistry QUESTION #5560

Question 4419

Which of the following compounds is NOT an antacid?

Aluminium hydroxide
Cimetidine
Phenelzine✔️
Ranitidine

Correct Answer Logic:

Antacids neutralize excess stomach acid. Aluminium hydroxide $Al(OH)_3$ is a classic antacid. Cimetidine and Ranitidine are $H_2$-receptor antagonists that reduce acid secretion — also classified as antacids. Phenelzine is a monoamine oxidase inhibitor (MAOI) used as an antidepressant, NOT an antacid.

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CISA QUESTION #1764

Question 4420

Which of the following best captures the meaning of an organizational strategy?

Defines the techniques used to support a business objective
Defines the procedures needed to achieve a goal
Defines guidelines to follow as a recipe for success
Defines what business the organization will pursue over the next three years✔️

Correct Answer Logic:

Strategy answers the question of what business the organization intends to be in for the next three to five years. Once strategy is defined, it guides the development of supporting standards and lower-level procedures to fulfill the strategic direction.

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