KMU CAT 2022 original Test

Acetone (CH₃–CO–CH₃) is propanone (3‑carbon ketone).

Vertebrate bones are primarily composed of calcium phosphate (as hydroxyapatite), providing rigidity and strength to the skeletal system.

Urine exits the body through the urethra, the final passageway after leaving the bladder. The sequence is: kidney → ureter → bladder → urethra.

A mutation is a permanent alteration in the DNA sequence that makes up a gene. These changes can occur due to errors in DNA replication or environmental factors. Mutations can be beneficial, neutral, or harmful to an organism.

Microwaves match water’s resonant frequency → Efficient heating.

Mean square current = (Peak current/√2)² = (√2/√2)² = 1 A (Note: question seems to have a typo).

The embryo implants in the endometrium, which is the inner mucous lining of the uterus. This tissue thickens during the menstrual cycle to prepare for potential implantation. It provides nourishment to the developing embryo in early pregnancy.

Trimethylene glycol (HO–CH₂–CH₂–CH₂–OH) is a vicinal diol (OH on adjacent carbons).

Bones along the body’s long axis (skull, vertebrae, ribs, sternum) form the axial skeleton, distinguishing it from the appendicular skeleton (limbs and girdles).

Antimony (Sb) is diamagnetic, unlike ferromagnetic Fe, Co, and Ni (repeated question).

Cooling gas reduces molecular motion → Decreases entropy.

C₂H₆O has 2 isomers: ethanol (CH₃CH₂OH) and dimethyl ether (CH₃OCH₃).

Allama Muhammad Iqbal, the poet‑philosopher and spiritual father of Pakistan, passed away on 21st April 1938 in Lahore. His death anniversary is observed as Iqbal Day in Pakistan to honor his contributions to the Pakistan Movement.

The correct idiom is “tooth and nail” meaning to fight fiercely or with great determination. The sentence suggests Pakistan needs to fight extremely hard to win the test series against India.

Photoelectric effect (electron emission) reverses X‑ray production (electron deceleration).

DNA fragments have sticky ends due to unpaired bases left after restriction enzyme cuts. These complementary single‑stranded overhangs allow fragments from different sources to join together through base pairing during recombinant DNA technology.

The smallpox vaccine, developed by Edward Jenner in 1796, was the first scientifically approved vaccine. Jenner used cowpox virus to provide immunity against smallpox, laying the foundation for modern vaccinology.

When dot product of nonzero vectors is zero (perpendicular), cross product magnitude = AB.

All options (waste prevention, atom economy, safer synthesis) are core principles of green chemistry.

Electron‑deficient species are electrophiles (accept electron pairs).

The correct preposition is “to” – “Add some milk and sugar to your tea.” This follows standard English usage where we add ingredients “to” food or drinks during preparation.

Barium is paramagnetic; Iron, Nickel, Cobalt are ferromagnetic.

The BCG (Bacille Calmette‑Guérin) vaccine is used to prevent Tuberculosis (TB). It stimulates immunity against Mycobacterium tuberculosis, the bacterium causing TB.

Pepsin works optimally at pH ~ 2 (stomach’s acidic environment) for protein digestion.

The lyrics of Pakistan’s national anthem “Pak Sarzamin” were written by Hafeez Jalandhri in 1952. The music was composed by Ahmed G. Chagla, and it was officially adopted in 1954.

Urdu was officially declared the national language of Pakistan in April 1954 through a constitutional amendment. This decision aimed to unify the linguistically diverse nation under one national language while recognizing regional languages.

With 2 nucleotides per codon and 4 possible bases (A, T/U, C, G), the number of possible codons is 4² = 16. Normal 3‑nucleotide codons allow for 4³ = 64 possible combinations, which is sufficient for all amino acids.

Photon is a boson (spin = 1); others are fermions (spin = ½).

Oxytocin is secreted by the posterior pituitary, not the anterior pituitary.

CH₃Cl has tetrahedral geometry (sp³ hybridisation, 109.5° bond angles).

Estrogen causes the mammary glands to enlarge at puberty.

The brain develops from ectodermal tissue, the outermost embryonic germ layer. Ectoderm also forms the nervous system, skin, and sensory organs. In contrast, muscles and bones develop from mesoderm.

The correct verb is “was” because the subject “number” is singular, even though it refers to multiple people. We say “The number was amazing” but “The friends and family members were amazing.”

Antimony (Sb) is not ferromagnetic; only Fe, Co, and Ni exhibit ferromagnetism.

Fischer‑Tropsch synthesis uses CO and H₂ to produce alkanes: nCO + (2n+1)H₂ → CₙH₂ₙ₊₂ + nH₂O.

Petroleum is called “black gold” due to its high economic value and dark colour.

Potassium dichromate (K₂Cr₂O₇) acts as a strong oxidizing agent in redox reactions.

Iodine (I₂) is the strongest reducing agent among halogens due to its lowest electronegativity.

Hazrat Musa (Moses) is called “Kalimullah” (Speaker of Allah) because he had the unique privilege of direct conversation with Allah at Mount Sinai, as mentioned in the Quran (4:164).

Reverse‑biased PN junction blocks current → acts as OFF switch.

A reflex action is initiated by a sensory nerve detecting a stimulus and sending signals to the spinal cord for an automatic response.

Homology refers to similarities in characteristics due to shared ancestry. These traits may have different functions in different species (like human arms and bat wings) but share underlying anatomical structures from a common ancestor.

Circular motion has constant speed but changing direction → Variable acceleration.

A submetacentric chromosome has arms of unequal length due to the centromere being slightly off‑center. In contrast, metacentric chromosomes have equal arms, acrocentric have one very short arm, and telocentric have the centromere at the end.

Natality means the number of births or measurement of births that have happened within a specified area or region in a specified period of time.

Resistance (R) ∝ length² → when length doubles (2L), R becomes 4 times (4r).

Clemmensen method (Zn‑Hg/HCl) reduces carbonyl (C=O) to CH₂.

Urea (NH₂CONH₂) was the first organic compound synthesised by Wöhler (1828).

Impulse = Force × Time → SI unit = Newton‑second (N·s).

Lithosere is a type of ecological succession that begins on bare rock surfaces. Pioneer species like lichens first colonize the rocks, breaking them down to form soil over time, allowing other plants to gradually establish themselves.

Silicon (Si) and Aluminium (Al) are the two most abundant elements in Earth’s crust.

Surah Al‑Fatiha is called the “Mother of the Quran” (Umm al‑Kitab) because it summarizes the Quran’s core message and is recited in every unit of Muslim prayer (Salah).

Potassium ferrocyanide (K₄[Fe(CN)₆]) is a complex salt with coordination bonds.

Benzyl alcohol (C₆H₅–CH₂OH) is aromatic due to benzene ring.

Pakistan’s first constitution was approved on 29th February 1956 and came into effect on 23rd March 1956, declaring Pakistan as an Islamic Republic. This ended Pakistan’s status as a British Dominion.

Prophet Muhammad (PBUH) lived in Madinah for approximately 10 years after the Hijra (622‑632 CE). This period marked the establishment of the first Islamic state and community.

Dehydrohalogenation requires alcoholic KOH to eliminate HX and form alkenes.

NMR spectroscopy provides most structural information (carbon skeleton, functional groups, connectivity via chemical shifts and splitting).

The appendix, coccyx, and nictitating membrane are vestigial structures – remnants of organs that had important functions in ancestors but are now reduced in size and function. They provide evidence for evolution through comparative anatomy.

The cartilaginous rings in the trachea provide structural support, keep the airway open, and prevent collapsing during inhalation and exhalation, ensuring uninterrupted airflow.

Prolactin is the hormone responsible for milk secretion after childbirth (parturition).

The correct way of writing units follows the International System of Units (SI) conventions. Option (d) uses proper notation with negative exponents for derived units (kg per cubic metre). Other options have formatting issues (missing spaces between numbers and units, incorrect symbols).

There are divergent (differing or varying) views on giving bonuses to employees. Different stakeholders like management, employees, and shareholders often have contrasting perspectives on bonus distribution policies.

Fischer‑Tropsch process converts coal/syngas (CO + H₂) to liquid hydrocarbons.

Drosophila melanogaster (fruit fly) uses an XY‑XX sex determination system similar to humans. Males are XY while females are XX. However, in Drosophila, sex is determined by the ratio of X chromosomes to autosomes rather than the presence of a Y chromosome.

Haemoglobin exhibits quaternary structure (4 polypeptide subunits: 2α + 2β chains).

Chloroacetic acid (Cl–CH₂–COOH) is strongest due to electron‑withdrawing Cl increasing acidity (pKa ~ 2.9).

Formaldehyde (HCHO) is most reactive due to minimal steric hindrance and strong electrophilic carbonyl carbon.

Metal hydrides (e.g., NaBH₄, LiAlH₄) reduce carbonyl to alcohols.

Ampère’s circuital law applies to any closed loop path enclosing current.

The first Ghazwa (military expedition) of Islam was the Battle of Abwa/Waddan in 2 AH (623 CE). It was led by Prophet Muhammad (PBUH) against the Quraysh and their allies.

Remote controls use infrared light (EM waves) travelling at light speed.

Water has highest boiling point due to extensive hydrogen bonding (100°C vs acetic acid’s 118°C, but water’s H‑bonds are stronger).

The lateral walls of the chest cavity are formed by the ribs and intercostal muscles, which assist in breathing by expanding and contracting the thoracic cavity.

Neurons (nerve fibers) are distinguished from muscle fibers by the presence of dendrites, which receive signals, unlike muscle fibers that contain myofibrils for contraction.

E‑field SI unit = Volt/metre (also correct: Newton/Coulomb).

KE ∝ v² → When speed doubles, KE increases by 4 times.

Habituation is the decrease in response to repeated or continuous stimulation.

In ideal transformers, power (P = VI) remains constant (ignoring losses).

“Would” is used here to describe a past habitual action. The sentence indicates that during her university days, she had a regular habit of waking up early in the morning.

Excess HCl adds to acetylene (C₂H₂) to form 1,1‑dichloroethane (Markovnikov addition).

Carbocation: positively charged carbon with 3 bonds (sp² hybridised).

Energy flows through an ecosystem in one direction – from the sun to producers (plants), then to consumers (herbivores, carnivores). This flow is non‑cyclic and irreversible as energy is lost as heat at each trophic level according to the 10% law.

Prolactin is the primary hormone responsible for initiating and maintaining milk production after childbirth. While oxytocin helps with milk ejection, prolactin directly stimulates mammary glands to produce milk. Its levels rise during pregnancy and remain high while breastfeeding.

Humans have 31 pairs of spinal nerves (total 62), categorized into cervical (8), thoracic (12), lumbar (5), sacral (5), and coccygeal (1).

In butterflies, females are typically homogametic (XX) while males are heterogametic (X0 or XY depending on species). This is the reverse of some species where females are ZW and males are ZZ.

Oxytocin is secreted by the posterior pituitary gland.

Mass defect: Nucleus mass < sum of nucleon masses due to binding energy release.

The anterior pituitary secretes gonadotropic hormones (FSH and LH), which regulate reproductive functions.

The kidneys regulate water balance by adjusting urine concentration through processes like reabsorption and filtration, making them the primary control mechanism.

Increasing brightness (intensity) increases photon count, not energy/speed/frequency.

The Loop of Henle in the nephron creates a concentration gradient in the kidney medulla, allowing water reabsorption and urine concentration via countercurrent multiplication.

Prophet Sulaiman (Solomon) was granted the miraculous ability to communicate with animals and jinn by Allah. This special gift is mentioned in the Quran (Surah An‑Naml 27:16‑19).

The telencephalon refers to the cerebral hemispheres, which include the cortex, basal ganglia, and limbic system.

Chlorofluorocarbons (CFCs) release chlorine radicals that catalytically destroy ozone.

Imprinting is a form of innate behavior (e.g., ducklings following their mother) and does not involve trial‑and‑error learning.

The clavicle (collarbone) is part of the pectoral girdle (along with the scapula), connecting the upper limbs to the axial skeleton.

Opening both pipe ends changes fundamental frequency from v/4L to v/2L → 2f.

The first Indo‑Pakistan war was fought in 1947‑1948 immediately after partition over the princely state of Jammu and Kashmir. This conflict began in October 1947 when tribal militias invaded Kashmir, leading to Indian intervention.

Nail polish removers primarily contain propanone (acetone, CH₃–CO–CH₃) as solvent.