KMU CAT PAST PAPERS AND SYLLABUS
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
Acetic acid
Water
Ethyl alcohol
diethyl ether
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Explanation
Acetic acid (CH3COOH) has the highest boiling point among the given options due to its strong capacity for hydrogen bonding.
Acetic acid (CH3COOH) has the highest boiling point among the given options due to the presence of strong intermolecular forces called hydrogen bonding.
The carboxyl group (-COOH) in acetic acid allows for hydrogen bonding with other acetic acid molecules,
This results in a significantly higher boiling point compared to the other compounds.
ڈوپلر کا اثر _____ پر لاگو ہے؟
Sound waves
Light waves
Transverse waves
Both sound and light waves
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Explanation
The Doppler effect is applicable to all types of waves, including sound waves, light waves, and even water waves.
It describes the change in frequency or wavelength of a wave when there is relative motion between the wave source and the observer.
ریڑھ کی ہڈی میں کتنے جوڑے ریڑھ کی ہڈی میں ہیں؟
31 pairs
24 pairs
36 pairs
None of these
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Explanation
There are 31 pairs of spinal nerves ( 62 nerves ) that originate from the spinal cord. These include 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal nerve pairs.
حقیقی گیسیں _____ پر مثالی رویے سے انحراف ظاہر کرتی ہیں؟
Low temperature and high pressure
High temperature and low pressure
Low temperature and low pressure
High temperature and high pressure
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Explanation
Real gases show deviation from ideal behavior at low temperature and high pressure.
Due to increased intermolecular forces and reduced volume available for gas molecules, which contradicts the assumptions of ideal gas behavior .
ہائیڈروجن کا کون سا آاسوٹوپ تابکار ہے؟
Tritium
Protium
Deuterium
None of these
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Explanation
Tritium (³H) is the only radioactive isotope of hydrogen, emitting beta radiation. It has one proton and two neutrons, making it unstable and radioactive .
f
s
p
None of these
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Explanation
p-orbitals have a dumbbell shape with two lobes on opposite sides of the nucleus.
s -orbitals are spherical.
d -orbitals are clover-shaped.
f -orbitals are more complex.
C₃H₆O₂
C₂H₄O₂
C₂H₆O₂
None of these
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Explanation
Empirical formula calculation :
C: 40 ÷ 12 ≈ 3.33 → 2 (adjusted for simplest whole numbers)
H: 6.7 ÷ 1 ≈ 6.7 → 4
O: 53.3 ÷ 16 ≈ 3.33 → 2
→ Empirical formula ≈ C₂H₄O₂
Relative molecular mass check:
C₂H₄O₂ = 2×12 + 4×1 + 2×16 = 60 → fits the given range 55–65 .
2.0 moles of hydrogen chloride
0.5 moles of water
1.0 moles of carbon dioxide 1.0 moles of methane
None of these
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Explanation
Number of atoms = moles × Avogadro’s number × atoms per molecule.
HCl: 2.0 moles × 2 atoms = 4.0 moles of atoms H₂O: 0.5 moles × 3 atoms = 1.5 moles of atoms CO₂: 1.0 mole × 3 atoms = 3.0 moles of atoms CH₄: 1.0 mole × 5 atoms = 4.0 moles of atoms HCl and CH₄ both have 4 moles of atoms, but the given answer refers to HCl .
40%
80%
30%
None of these
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Explanation
Calcium carbonate (CaCO₃) has molar mass 100 g/mol (Ca = 40, C = 12, O₃ = 48).
%Ca = (40/100) × 100 = 40%.
Second order reaction
Not possible
Zero order reaction
None of these
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Explanation
In a zero-order reaction , the rate is independent of the concentration of reactants.
The rate depends only on the rate constant, i.e., Rate = k .
