DUHS MDCAT Past Papers Reconduct 2023

Fatima, whose mom is a nurse, sits behind me in class.

He met a boy whose eyes were blue.

I expect that I shall get a prize.

I want to see what had happened.

I do not know what he will do.

Having had lunch; we went back to work.

Over the rocky levels of the mountain was a streak of rust coloured air

And you did all this against your doctor’s orders!” “Which one.” he asked, laughing.

 One of them, however, said, ”She was a very old woman, who must have died shortly in any case.

“Certainly, answered the man;”here, bring me a blanket and a good-sized mallet.”

Three weights W, 2W, and 3W are connected to identical springs suspended from a rigid horizontal rod. The assembly of the rod and the weights falls freely. The positions of the weights from the rod are such that:

If the temperature of an ideal gas in a sealed, rigid container is increased to 1.5 times the initial value (in K), the density of gas:

X ml of H2 gas effuses through a hole in a container in 5 seconds. The time taken for the effusion of the same volume of O2 gas under identical conditions is:

NH₃ gas and HCl gas from the two flasks,at same temperature and pressure were injected simultaneously through pinholes of similar geometry, attached at the two ends of a 1.0 m long glass tube. At what distance from the ammonia end, the first flash of white fume would be observed?

A jar contains a gas and a few drops of water at ‘T’ Kelvin temperature. The pressure in the jar is 830 mm of Hg. The temperature of the jar is reduced by 1%. The vapour pressure of water at two temperatures are 30 and 25 mm of Hg respectively. Calculate the new pressure in the jar?

The compressibility factor Z=PV/RT for 1 mol of a real gas is greater than unity at a pressure of 1 atm and 273.15 K. The molar volume of the gas at STP will be :

When n-butane is heated in the presence of AlCl₃ / HCl it will be converted into:

The correct decreasing order of reactivity of alkenes towards hydrogen halides is:

Sabatier Senderen’s reaction is an example of:

The dehydrohalogenation of 2-bromobutane with alcoholic KOH gives :

Root pressure develops due to:

In land plants, the guard cells differ from other epidermal cells in having:

Which of the following criteria does not pertain to facilitated transport?

In a ring-girdled plant:

Which one gives the most valid and recent explanation for stomatal opening?

Transpiration and root pressure cause water to rise in plants by:

Stimulation of a muscle fiber by a motor neuron occurs at:

Sliding filament theory can be best explained as:

Glenoid cavity articulates:

Which of the following joints would allow no movements?

In the mammalian eye the ‘fovea’ is the center of the visual field where:

Destruction of the anterior horn cells of the spinal cord would result in the loss of:

Injury localized to the hypothalamus would most likely disrupt:

Which of the following regions of the brain is incorrectly paired with its function?

A gymnast is able to balance his body upside down even in the total darkness because of:

Main points of Darwin’s theory of evolution are:

A respiratory protein found in all aerobic species is:

The evolutionary view of biogeography predicts that contemporary armadillos are modified descendants of earlier species that occupied:

A mammal that lives only in America is:

Out of the 13 types of finches collected by Darwin from Galapagos:

There———many students waiting to bear the result of the test.

Synonym of Threatening

Which of the following gives the meaning of the prefix “tele”?

Which unit expresses work per unit charge?

A ——– is positively charged particle with properties similar to the a- +particle. Its mass is one fourth and charge is one half of that of a particle. It is smaller in size and carries less energy at the same velocity.

According to Bohr’s theory of Hydrogen atom, only those atomic orbits with radil “P” and atomic shell “n” around the nucleus are allowed which have the angular momenta:

During the process of nuclear disintegration, when alpha particle emission occurs, atomic no of the atom changes by and its mass number changes by

In a npn transistor, the current lE that flows in the emitter circuit is:

The volume occupied by one kilogram by weight of pure water at 3.98° C is known as:

The closeness of two measurements is evaluated by its.

The sum of all forms of molecular energies in a thermodynamic system is known as:

One kilowatt hour equivalent by a factor——– In Joules.

A Fixed mass of an ideal gas absorbs 1000 J of heat and expands under a constant pressure of 20 kPa from a volume of 25 x 10′ m’ to a volume of 50×103 m* What is the change in internal energy of the gas?

Which pair includes a vector quantity and a scalar quantity respectively?

When a transformer is connected to 120-volt ac, it supplies 300 V to a device. The current through the secondary winding then is 0.06 A and the current through the primary is 2 A. The number of turns in the primary winding is 400. The number of turns in the secondary winding is:

The process of natural decay of some heavy nuclides is because of the phenomenon.

Gamma rays are emitted from nuclei of radioactive atoms. They are nothing

48.86 can be round of,

Two springs fixed at one end are stretched by 5 cm and 10 cm, respectively, when masses 0.5 kg and 1 kg are suspended at their lower ends. When displaced slightly from their mean positions and released, they will oscillate with time periods in the ratio

A 3-cm length of wire is moved at right angles across a uniform magnetic field with a speed of 2.0 m/s. If the flux density is 5.0 teslas, what is the magnitude of the induced e.m.f?

The phenomenon in which certain elements emit invisible radiations is called:

Which of the following best describes the emission spectrum of atomic hydrogen?

The series limit for the Balmer series of hydrogen spectrum occurs at 3664A. Calculate ionization energy of hydrogen atom.

In photodiode, the bias voltage is applied in bias form:

760.0 have

The internal energy of an ideal gas depends upon its:

What will be the position of the object, when a convex lens of focal length 20 cm, is used to form an erect image which is twice as large as the object.

A body of mass 4 kg attached to a spring is displaced through 0.04 m from its equilibrium position and then, if the spring constant is 400 N/m find the time period of vibration?

Find the gravitational force of attraction between two balls each weighing 10 kg. when placed at a distance of 1 meter apart.

A fixed mass of gas in a thermally insulated container is compressed. After compression, the temperature of the gas will have:

A cyclist moving towards right with an acceleration of 4m/ Sec2 at t = 0, he as traveled 5m moving towards the right at 15m/Sec. what be his position at t=2 seconds?

Two forces equal in magnitude but opposite in direction and not acting along the same line constitute a couple

The solar day is the time interval between two successive appearances of the    sun overhead. The time that is referred to rotation of the earth about its axis is called:

When an electron and its anti particle position come close enough to each    other, they Completely convert into radiation energy in the form of photons, this process    Is called:

In simple harmonic motion, a particle is oscillating in such a way that its total    energy remains conserved. When this particle reaches its two extreme positions, its    potential energy at extreme positions becomes:

The lightest element which exhibits radioactivity is:

Incident rays of light parallel to the principal axis of a convex lens, after refraction by the lens, will:

When the number of significant figures in a measurement are indicated is shows the level of

The ground state of an atom corresponds to a state of:

The radius of third bohr orbit is:

A conductor carrying a current I has length L. when it is placed in a magnetic field, Bat 90° it experiences a force

When a 7000 N elevator moves from street level to the top of a building 300m above the street level, what is the change in gravitational potential energy?

Light can be polarized by:

A person having a mass of 60 Kilograms exerts a horizontal force of 200 newtons in pushing a 90 kilogram object a distance of 6 meters along a horizontal floor. He does this at constant velocity in 3 seconds. The weight of this person is approximately, in newtons: (g=9.8m/s°)

A stone is thrown horizontally from 2.4 m above the ground at 35 m/s . The wall is 14 m away and 1 m high. At what height the stone will reach? Where will the stone land?

A handball is tossed vertically upward with a velocity of 19.6 m/s. approximately how high will it rise?

The process in which light bends around an obstacle is called:

If a car collides with a housefly, what will be the magnitude of the force experienced by the housefly?

There are different types of waves that exist in this universe. Which of the following waves do Not need any material medium to travel?

In electromagnetic spectrum of radiations, the wavelength spectrum that is visible to humans lies in the range of:

In free states, the mass of the nucleus is always:

The quantum numbers +1/2 and -1/2 for the electron spin represent:

Which of the following has the smallest size?

Matter is made up of:

Atomic number of C is 6 and H is 1. How many electrons are present in 1.6 grams of methane?

How many electrons can have the value n=2, I=1 and s – ½ in the configuration 1S2?, 2S2?,2p3?

In which of the following compound carbon uses sp” hybrid orbitals for bond formation?

The K.E the molecules of an ideal gas at absolute zero will be.

For a gas obeying Boyl’s Law if pressure doubled the volume becomes.

Magnesium oxide is used in the making of the lining of the blast furnace.It is extracted from seawater as follows. Aqueous seawater is added to seawater. Ca(OH)2(aq)+MgCl2 (aq)——–>Mg (OH)2(s) + CaCl2 (aq). The magnesium hydroxide is then filtered off and roasted. Which of the following comparisons between calcium and magnesium explains why magnesium hydroxide forms?

Strontium lies between calcium and barium in group lIA in the Periodic Table. Which of the following properties could be predicted for strontium?

The unit cell with crystallographic dimensions a = b= c, a = B = y = 90° is:

H2O has higher boiling point than HF because?

NH2 (amine) is an example of:

When describing the isotopes of the same element, the most accurate statement is that they have:

If constant temperature conditions are applied to a gas container, then the volume of the mass of that gas tends to increases by:

Which one of the following does not give iodoform test?

Lithium and beryllium are unique in such a way that they have higher charge   densities which produce strong polarizing effects due to:

Which of the following reactions is NOT shown in ketones?

CH3 CH2 CH2 CH2 COCH3 Is the functional isomer of

Which of the following has the maximum number of unpaired electrons?

The geometry of H2S and its dipole moment are:   Ans Angular and non-zero

Consider the following reaction N2 + O2 —–> 2NO Kc = 0.1 at 2000° C. If original concentrations of N2 And O2 Were 0.1 M each. Calculate the concentrations of NO at equilibrium.

If the difference between electronegativity values between two atoms is less than 1.7, the bond is necessarily.

JJ Thomson determined the:

What volume in dm3 of KCL is obtained in the following equation: 2KCIO3 – -> 2 KCI + 3O2.

Common name of Octadecanoic acid is:

Shape of the orbital occupied by an electron is defined by:

Electronic Configuration of M** Ion is 2,8,14 and its atomic weight is 56 amu. The number of neutrons is its nucleus are:

Compound was found to contain nitrogen and oxygen in the ration 28 g: 80g. the formula of the compound is:

A correct formula must:

Absolute zero is considered to be the temperature at which.

One Calorie is equal to:

Which one of the following is the pure carbon compound and used as reducing agent in industries?

The normal pH of blood is:

The melting point of NaCi is very high 801°,it is reduced to 600°C, it is by in Down’s process

How many chain isomers are shown by C5G12 ?

The boiling point of water is highest than other hydrides because water molecules can form:

When electricity is passed through water in the presence of an acid oxygen is produced.

When electricity is passed through water in the presence of an acid oxygen is produced.

Which alkyl halide has the lowest reactivity for a particular alkyl group?

Which of the following properties depends upon the amount of matter present in the system?

A substance of definite composition by weight consists of atoms of two or more different elements is called as:

Ice cream is an example of:

Which part of the cell does glycolysis occur in?

The system responsible for fighting the pathogens is:

The category of organisms which are able to make their own food is called:

Which of the following basic structural level of proteins is indicated by an association of two alpha and two beta chains in the hemoglobin molecule?

The branch of science dealing with the classification of life forms is called:

The diseases arises due to age is:

Referring to sexual reproduction, humans are:

All of the following protect the body against the entrance of germs except:

The first step in nitrogen cycle is:

Which bones meet at the elbow joint and what kind of movement they allow?

Identify the correctly matched pair relating to a term and its meaning/ function/ example:

Cystic fibrosis patients lack a gene that codes for a transmembrane carrier of:

The technique used for identification of criminals is called:

The process by which one molecule of Glucose splits up into molecules of pyruvate is called

Which one of the following organelles is required for aerobic respiration?

The abundant inhibitory neurotransmitter found in the CNS is called?

The attraction between water molecules and cell wall of xylem is termed as :

Which process can take place in the presence and absence of oxygen?

The particular array of chromosomes that an individual is called its.

Phenotype is.

identify the bones in which the connecting joints are freely moveable joint:

Lock & key model of enzyme action proposed by Emil Fischer suggested that.

Which of the following is an unsaturated fatty acid?

Which property of water helps to maintain the integrity of cell membranes?

Alleles both have an effect on the phenotype heterozygous organism

Which of the types of cell are found in the secondary xylem of angiosperms?

What happens to the volume of the thorax and the air pressure in the lungs during breathing in?

The scientific name of Thorn apple is:

Which one of the following “myogenic” types of muscle?

Select a method which cause the oxidation of constituent of a bacterial cell wall

Pseudopodia are found in:

Movement of ions and large molecules with the help of protein molecules in

Which of the following statements is true about savannah?

in roots the apoplast pathway of water is disrupted when water reaches.

Which of the following is true about amoeba?

The complete, mature and infection virus particle is known as.

Class elasmobranch have an exoskeleton of

The eggs of a chick is laid at which of the following stages?

How would an ammonium group affect on benzene ring for subsequent reactions?

The excretion of hypertonic urine in humans is associated best with the—-