According to PMDC MDCAT 2025 Syllabus and subject weightage: Total MCQS 180
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The number of atoms in 44 g of CO₂ is:
A) 3.01 × 10²³
B) 6.02 × 10²³
C) 1.81 × 10²⁴
D) 2.41 × 10²⁴
The limiting reagent in a reaction is the substance:
A) Present in excess
B) Completely consumed first
C) With smallest molar mass
D) That increases yield
The photon of which color has maximum energy?
A) Red
B) Blue
C) Green
D) Yellow
The maximum number of electrons in n = 5 shell is:
A) 25
B) 32
C) 50
D) 72
The number of subshells in the third shell is:
A) 2
B) 3
C) 4
D) 5
The average kinetic energy of a gas is directly proportional to its:
A) Pressure
B) Volume
C) Temperature (in K)
D) Density
The gas that deviates least from ideal behavior is:
A) CO₂
B) NH₃
C) H₂
D) SO₂
According to Dalton’s law, the total pressure of a mixture of gases equals:
A) Product of individual pressures
B) Sum of partial pressures
C) Ratio of pressures
D) Difference of pressures
The rate of evaporation increases by:
A) Increasing surface area
B) Increasing humidity
C) Decreasing temperature
D) Increasing pressure
The intermolecular forces in water are mainly:
A) Van der Waals forces
B) Ionic bonds
C) Hydrogen bonds
D) Metallic bonds
Ionic solids are generally:
A) Soft with low melting point
B) Hard with high melting point
C) Flexible and ductile
D) Poor conductors in molten state
The lattice energy decreases when:
A) Charge on ions increases
B) Ionic size increases
C) Ionic radius decreases
D) Interionic distance decreases
The equilibrium constant for a reaction is large when:
A) Products predominate
B) Reactants predominate
C) Rate is slow
D) Catalyst is absent
For an endothermic reaction, an increase in temperature:
A) Shifts equilibrium to right
B) Shifts equilibrium to left
C) Has no effect
D) Decreases rate of reaction
The pH of pure water at 25 °C is:
A) 0
B) 1
C) 7
D) 14
The product of solubilities of ions of a sparingly soluble salt is called:
A) Ionization constant
B) Solubility product
C) Dissociation constant
D) Reaction quotient
The rate of a chemical reaction is doubled for every 10 °C rise in temperature because:
A) Activation energy decreases
B) Collision frequency increases
C) Enthalpy increases
D) Molecules become heavier
The half-life of a first-order reaction is related to rate constant as:
A) t½ = k
B) t½ = k / 2
C) t½ = 0.693 / k
D) t½ = 2k
In an exothermic reaction, energy is:
A) Absorbed
B) Released
C) Stored
D) Constant
According to Hess’s law, the heat of overall reaction is:
A) Sum of individual steps
B) Average of steps
C) Independent of path
D) Both A and C
The electrode where oxidation occurs is called:
A) Cathode
B) Anode
C) Salt bridge
D) Electrolyte
In the Daniell cell, the flow of electrons is from:
A) Cu to Zn
B) Zn to Cu
C) Anode to cathode through solution
D) None
The shape of BeCl₂ molecule is:
A) Linear
B) Bent
C) Trigonal planar
D) Tetrahedral
The molecule having sp² hybridization is:
A) CH₄
B) BF₃
C) C₂H₂
D) NH₃
The dipole moment of CO₂ is:
A) 0 D
B) 1 D
C) 2 D
D) 3 D
The periodic table is based on:
A) Increasing atomic mass
B) Increasing atomic number
C) Decreasing atomic weight
D) Number of valence electrons only
The alkali metal having lowest melting point is:
A) Li
B) Na
C) K
D) Cs
The element forming colored ions due to unpaired d-electrons is:
A) Zn
B) Cu
C) Mg
D) Ca
Organic compounds containing –CHO group are called:
A) Ketones
B) Aldehydes
C) Alcohols
D) Acids
The molecular formula of propene is:
A) C₃H₄
B) C₃H₆
C) C₃H₈
D) C₂H₆
The reaction of ethene with bromine water gives:
A) Ethane
B) 1,2-dibromoethane
C) Bromoethene
D) Ethanol
Benzene does not undergo addition reaction easily because of:
A) High stability due to delocalized π electrons
B) Lack of double bonds
C) Resonance energy is low
D) It is non-polar
Benzene does not undergo addition reaction easily because of:
A) High stability due to delocalized π electrons
B) Lack of double bonds
C) Resonance energy is low
D) It is non-polar
Phenol on bromination in water gives:
A) Bromobenzene
B) 2,4,6-Tribromophenol
C) 4-Bromophenol
D) p-Bromobenzene
Aldehydes are oxidized to:
A) Ketones
B) Acids
C) Alcohols
D) Alkanes
The reduction of carboxylic acids produces:
A) Alcohols
B) Aldehydes
C) Esters
D) Ketones
Proteins differ from carbohydrates because they contain:
A) Nitrogen
B) Carbon
C) Hydrogen
D) Oxygen
The tertiary structure of a protein is maintained mainly by:
A) Hydrogen bonds
B) Ionic bonds
C) Disulfide bridges
D) All of these
The enzyme catalase acts on:
A) Hydrogen peroxide
B) Glucose
C) Urea
D) Starch
PVC is an abbreviation for:
A) Polyvinyl chloride
B) Polyvinyl carbamide
C) Polyvinyl cyanide
D) Polyvinyl carbonate
Polystyrene is a polymer of:
A) Styrene
B) Propene
C) Vinyl chloride
D) Butadiene
Urea is produced industrially from:
A) Ammonia and carbon dioxide
B) Methane and oxygen
C) Nitrogen and hydrogen
D) Ammonia and sulfur dioxide
In the contact process, the catalyst used is:
A) Fe
B) Pt
C) V₂O₅
D) Ni
The main raw material for glass manufacturing is:
A) SiO₂
B) CaCO₃
C) Na₂CO₃
D) All of these
The polymer formed by condensation of adipic acid and hexamethylenediamine is:
A) Nylon-6,6
B) Bakelite
C) Terylene
D) PVC
The angle between two vectors whose resultant is equal to their difference is:
A) 0°
B) 60°
C) 90°
D) 120°
If a vector A = 5i + 12j, then its magnitude is:
A) 13
B) 17
C) 12
D) 5
A body moving with constant velocity has:
A) Constant acceleration
B) Zero acceleration
C) Increasing acceleration
D) Decreasing acceleration
The slope of a displacement-time graph represents:
A) Velocity
B) Acceleration
C) Distance
D) Speed²
The maximum range of a projectile on horizontal ground occurs at:
A) 30°
B) 45°
C) 60°
D) 90°
A 2 kg object moving with velocity 5 m/s has kinetic energy:
A) 10 J
B) 20 J
C) 25 J
D) 50 J
The unit of power is equivalent to:
A) J/s
B) N·m
C) W·s
D) kg·m²/s²
A force produces acceleration in a body proportional to:
A) Mass
B) Inverse of mass
C) Square of mass
D) Density
The angular displacement of a body rotating with constant angular velocity ω in time t is:
A) ω/t
B) ωt
C) ω²t
D) ω/t²
The direction of angular velocity vector is along:
A) Tangent to circle
B) Radius
C) Axis of rotation
D) Plane of motion
The unit of angular acceleration is:
A) rad/s
B) rad/s²
C) m/s²
D) 1/s
The terminal velocity of a sphere in a viscous fluid is proportional to:
A) Radius
B) Radius²
C) Radius³
D) Density
When area of pipe decreases, according to equation of continuity, speed of fluid:
A) Decreases
B) Increases
C) Remains same
D) Becomes zero
Bernoulli’s equation does not hold true when:
A) Fluid is incompressible
B) Flow is laminar
C) Viscosity is negligible
D) Flow is turbulent
The frequency of wave is inversely proportional to:
A) Period
B) Wavelength
C) Amplitude
D) Velocity
The relation between velocity, frequency, and wavelength is:
A) v = λf
B) f = λv
C) λ = vf²
D) f = v²/λ
The phenomenon of beats occurs due to:
A) Reflection
B) Interference
C) Refraction
D) Resonance
The phase difference between velocity and displacement in SHM is:
A) 0°
B) 45°
C) 90°
D) 180°
In SHM, acceleration is directly proportional to:
A) Velocity
B) Displacement
C) Amplitude
D) Frequency
The internal energy of an ideal gas is given by:
A) nRT
B) 3/2 nRT
C) 2 nRT
D) PΔV
The work done in adiabatic compression of gas is:
A) Zero
B) Positive
C) Negative
D) Infinite
The potential at a point midway between two equal and opposite charges is:
A) Zero
B) Infinite
C) Maximum
D) Minimum
Electric field between two parallel plates with charge densities ±σ is:
A) σ/ε₀
B) σ/2ε₀
C) 2σ/ε₀
D) ε₀/σ
Capacitance does not depend on:
A) Area of plates
B) Distance between plates
C) Dielectric constant
D) Voltage applied
The drift velocity of electrons is directly proportional to:
A) Current
B) Resistance
C) Area
D) Temperature
When two resistors are connected in series, total resistance:
A) Increases
B) Decreases
C) Remains same
D) Becomes zero
The current through a 10 Ω resistor connected to 20 V source is:
A) 0.5 A
B) 1 A
C) 2 A
D) 5 A
Magnetic field lines inside a solenoid are:
A) Parallel and uniform
B) Circular and random
C) Diverging
D) Non-uniform
The SI unit of magnetic flux density is:
A) Weber
B) Tesla
C) Henry
D) Ampere
Lenz’s law is based on:
A) Law of inertia
B) Law of conservation of energy
C) Law of momentum
D) Faraday’s law
Transformer works on the principle of:
A) Electromagnetic induction
B) Electrostatic induction
C) Self-induction
D) Mutual repulsion
The average power in an AC circuit is given by:
A) VI
B) VI cosϕ
C) V²/R
D) I²R
The electromagnetic wave which has the highest frequency is:
A) X-rays
B) Gamma rays
C) UV rays
D) Radio waves
A forward-biased diode has:
A) Low resistance
B) High resistance
C) Infinite resistance
D) Zero resistance
The energy of a photon with wavelength 500 nm is approximately:
A) 2.48 eV
B) 3 eV
C) 1 eV
D) 0.5 eV
The unit of radioactivity (rate of decay) is:
A) Curie
B) Tesla
C) Weber
D) Joule
“Life is a journey filled with twists and turns.” — Figure of speech?
a) Simile
b) Metaphor
c) Personification
d) Hyperbole
The word “vivid” in context usually means:
a) Dull
b) Bright or clear
c) Weak
d) Dark
“He cried a river of tears.” This is an example of:
a) Hyperbole
b) Metaphor
c) Simile
d) Personification
Choose the synonym of “courageous”:
a) Brave
b) Lazy
c) Weak
d) Shy
Correct pronoun agreement:
a) Neither of the students brought their pen.
b) Neither of the students brought his pen.
c) Neither of the students brought your pen.
d) Neither of the students brought their pens.
Correct tense:
She usually _____ up early in the morning.
a) gets
b) got
c) get
d) getting
Identify infinitive phrase:
a) To read more is my goal.
b) Reading more is my goal.
c) He reads every day.
d) I enjoy reading more.
Faulty structure:
a) The reason is because he was late.
b) He was late, that’s the reason.
c) He was late due to traffic.
d) He arrived late because of traffic.
Correct punctuation:
a) “Can you help me”? asked the boy.
b) “Can you help me?” asked the boy.
c) “Can you help me” asked the boy?
d) “Can you help me”; asked the boy.
All painters are artists. No artist is untalented. Conclusion: Are all painters talented?
a) Yes
b) No
c) Cannot say
d) Some painters maybe not talented
If CODE = 3-15-4-5, the sum of letters in ACE = ?
a) 9
b) 9
c) 15
d) 10
I: Government reduced import duties on books. II: Book prices fell. Relationship?
a) I→II
b) II→I
c) Independent
d) Unrelated
Statement: Many students failing basic math. Actions: (1) Introduce remedial classes. (2) Remove math from curriculum.
a) Only 1 follows
b) Only 2 follows
c) Both follow
d) Neither follows
Find the missing number: 7, 10, 8, 11, 9, ?
a) 12
b) 10
c) 13
d) 11
Some pens are blue. All blue are useful. Which conclusion is valid?
a) Some useful are pens.
b) All pens are useful.
c) No pen is useful.
d) All useful are pens.
Pattern: *, #, *, #, *, ?
a) *
b) #
c) **
d) ##
Sequence: 2B, 4D, 6F, 8H, ?
a) 10J
b) 9I
c) 10I
d) 12K
“If regular sleep improves memory and Sara sleeps irregularly, what follows?”
a) Sara has poor memory for sure.
b) Sara might not reap full memory benefits.
c) Sara’s memory is excellent.
d) No relation.