Balochistan MDCAT Past Paper 2023 for Medical and dental colleges admission test preparation online.
Balochistan MDCAT Past Paper 2023 MCQs
Which one is a variable capacitor
- Ceramic trimmer capacitor
- Variable capacitor
- Silver capacitor
- Air gap capacitor
Kinetic energy is product of two vectors. It is
- Cross product mass and velocity
- Cross product of velocities
- Dot product of mass and velocity
- Dot product of velocitie
In earth’s gravitational field, the absolute potential at any point in space is
- ( G Me ) / 2Re
- ( G Me ) / Re
- ( G mMe ) / Re
- ( G mMe ) / Re^2
Kinetic energy is product of two vectors. It is
- Cross product mass and velocity
- Cross product of velocities
- Dot product of mass and velocity
- Dot product of velocities
Which one is a variable capacitor
- Ceramic trimmer capacitor
- Variable capacitor
- Silver capacitor
- Air gap capacitor
De Broglie received the Nobel Prize in the year
- 1927
- 1905
- 1929
- 1937
Doppler effect can be observed by
- Longitudinal waves
- Electromagnetic waves
- Both Longitudinal & Electromagnetic waves
- Sound only
The direction of centripetal acceleration in a circle
- Parallel to the circle
- Tangent to the circle
- Opposite to the centripetal force
- Parallel to the centripetal force
When a nucleus emits beta particle. its mass number remains constant but charge number increases by:
- 4
- 2
- 3
- 1
If the initial velocity ‘u’ of the projectile is doubled, height ‘H’ of the projectile becomes
- H/4
- H/2
- 4H
- 2H
If Cv denotes molar speak heat at constant volume and ΔT is the change in temperature then CvΔT gives:
- Pressure
- Volume
- Internal energy
- Entropy
A circuit that converts pulsating voltage of the rectifier to smooth voltage is known as
- Filter
- Generator
- Choke
- Transformer
Two point charges, each of magnitude q are separated by a distance 2d. At a point mid-way between
- E=0, V≠0
- E≠0, V≠0
- E≠0, V=0
- E=0, V=0
In British Engineering system, 1 Horse Power is:
- 550 ft Pound/sec
- 746 ft Pound/sec
- 550 kilowatt hour
- 550 watt
Electric field lines are
- Solid lines
- Actual lines
- Imaginary lines
- Always curve lines
High frequency vibration is of:
- 1000 Hz
- 10 kHz
- 1 KHz
- 0.1 MHz
The magnetic flux through an area A in a uniform magnetic field B is given as
- BA sinθ
- BA tanθ
- B.A
- BA Cos2θ
The angle subtended at the center of a circle by an arc equal to 1/60th of a degree is called
- One minute
- One second
- One steradian
- One radian
What is the SI unit of conductivity
- selmen m
- mho – m-1
- Ohm^-1 – m
- mho-1 – m-1
The longest wavelength of Lyman series Is equal to
- 9 / RH
- 144 /7RH
- 4/3RH
- 1/RH
How much energy is converted in a resistor of 5 ohm carrying a current of 2.0 after 10 seconds
- 4.0 J
- 200 J
- 25 J
- 100 J
Which of the following has the largest energy
- A photon of wavelength 50 μm
- A photon of wavelength 200 nm
- A photon of wavelength 2 pm
- A photon of wavelength 1 nm
If the value of acceleration due to gravity (g) is reduced to half, the time of flight “T” of projectile become
- 4T
- 2T
- T/4
- T/2
When the transverse wave passes. the particles of the medium Oscillate
- With different frequencies
- Parallel to the direction of wave travel
- With different harmonics
- Perpendicular to the direction of wave travel
Which one of the following bulbs has the least resistance if the current is kept constant
- 100 watt
- 400 watt
- 200 watt
- 300 watt
When a gas is compressed isothermally, the product of its pressure and volume during the process is
- Proportional to entropy
- Zero
- Constant
- Not constant
The magnetic field depends upon
- Strength, mass and distance
- Strength. distance and direction
- Strength, mass and direction
- Strength, mass and nature of magnetic materials
Which product is formed when RMgX reacts with CO2
- Ketone
- Carboxylic acid
- Ethers
- Aldehyde
Temperature increase in an exothermic reversible reaction, shift the equilibrium to
- Product side
- Increase in both
- Reactant side
- Remains unchanged
Sp2 hybrid carbon atom is present in
- Methanal
- Propanol
- Ethanol
- Methanol
Which of the following carbon atom is sp2 hybridized
- Hexane
- Diamond
- Cyclopropane
- Graphite
The equilibrium stage that is not affected by temperature is called
- Dynamic equilibrium
- Unstable equilibrium
- Natwal equilibrium
- Static equilibrium
When aqueous solution of NaCI is electrolyzed
- H2 is evolved at the cathode
- CI2 is evolved at the cathode
- Na+ is deposited at the cathode
- Na appears at the anode
What is the common name of 1,2,3-propanetriol
- Glycol
- Glycerol
- Butyl alcohol
- Propyl alcohol
Which order of reaction obeys the expression t1/2 = 1/Ka
- Second
- First
- Zero
- Third
Which of the following is not an endothermic reaction
- Decomposition of water
- Dehydrogenation of ethane or ethylene
- Combustion of methane
- Conversion of graphite to diamond
What is the reactivity state of Phenols
- More reactive
- Nonreactive
- Neutral
- Less reactive
Which of the following acid can show cis-trans isomerism
- Lactic acid
- Maleic acid
- Succinic acid
- Malonic acid
Air at sea level is dense. This Is practical application of
- Boyles law
- Charles law
- Avogadro’s law
- Dalton law
Which of the following statement is true about Grignard reagent ( RMgX)
- RMgX Is prepared in ether
- RMgX does not react with Water
- RMgX inactive In ethanol
- RMgX is prepared In aqueous medium
Methanol is prepared from carbon monoxide and hydrogen. The catalyst used for this reaction is
- Cr203 + ZnO
- ZnO + Cu0
- ZnO + Co02
- ZnO + Ag20
Why do transition elements form alloys so easily
- Atomic size
- Hard elements
- Very light
- Orbital configuration
For every reaction occurring in human body there is at least one type of
- Vitamin
- Enzyme
- Protein
- Amino acid
The solubility of KCIO3 Is decreased by adding
- Not effected
- KCI
- H20
- KClO3
At room temperature. Glycerin bolls at 290 C. What is the boiling point of glycerin under vacuum distillation at 50 torr
- 210 C
- 310 C
- 300 C
- 320 C
Which of the following acids has the smallest dissociation constant
- FCH2CH2COOH
- CH3CHFCOOH
- BrCH2CH2COOH
- CH3CHBrCOOH
Which functional group is characteristic of ester
- R-CO-OR
- R-CO-OH
- R-CO-R
- R-O-R
The hydrocarbon which has isolated ring and is aromatic
- Triphenylmethane
- Phenanthrene
- Diphenyl ether
- Anthracene
Coulomb’s law is only true for point charges whose sizes are
- Large
- Very small
- Very large
- Medium
The polar part of the soap and detergents dissolve in meet molecules due to:
- Dipole – dipole forces
- Dipole – induced dipole forces
- London Dispersion forces
- Hydrogen bonding
The solubility of carboxylic acid in water gradually decreases with
- Increases in molecular mass
- Increases the amount of acid
- Decreases in molecular mass
- Decreases the amount of water
Which of the following is not true about Canal rays
- Show deflection under electric & magnetic fields
- Do not cause mechanical motion
- 9.54 x 10^7 C/kg
- 1.6726 x 10^-27 kg
Hess’s law state the same thing as
- First law of thermodynamics
- Second law of thermodynamics
- Henry’s law
- Third law of thermochemistry
How many moles of a gas occupy 30.57 L at 55 °C and 0.83 atm
- 0.62 mol
- 0.94 mol
- 0.84 mol
- 0.1 mol
What is the weight of oxygen that is required for the complete combustion of 3.2 kg of methane
- 12.8 kg
- 3.2 kg
- 15.4 kg
- 6.4 kg
What is the quantum number for the unpaired electron of chlorine atom (n, l, m )
- 3, 0, 0
- 2, 1, 0
- 3, 1, 1
- 2, 1, 1
Which ionic radii is the smallest one
- Na+
- Mg+
- Mg++
- Al+++
The overall charge on transition state in SN2 reaction is
- Partially positive
- Neutral
- Negative
- Positive
In which method the rate of reaction involving ions can be studied
- Electrical conductivity method
- Spectrometry
- Optical rotation method
- Refractometric method
Number of primary carbon atoms present in isobutane is
- Two
- Four
- Three
- One