SURPRISE EXAM Flashcards
sp2 hybridization will be found for carbon in
A. CH4
B. C2H4
C. C2H2
D. CH3OH
B. C2H4
Which of the following is responsible for abnormally high boil-in point of water?
A. Covalent Bonding
B. Hydrogen Bonding
C. High Polarity
D. Large Dielectric Constant
Hydrogen Bonding
Which of the following bonds is the least polar?
A. B-Cl
B. H-I
C. C-Cl
D. C-I
D. C-I
The diene CH2=CH-CH=CH2 has double bonds that are
A. Conjugated
B. Cumulated
C. Propagated
D. Isolated
A.Conjugated
The method of preparing an ether as shown is known as CH2=CHCH2CI+NaOCH2CH=> CH2=CHCH2OCH2CH3 + NaCl
A. Williamson Reaction
B. Dehydration
C. Wurtz Reaction
D. Sodium Substitution
A. Williamson Reaction
Glycols differ from alcohols in that they
A. contain a carboxyl group
B contains more than one hydroxyl group
C. Contain a halide group
D. Participate in the Sandmeyer Reaction
B. contains more than one hydroxyl group
An ester is made by reacting
A. an amine and an alcohol
B. two different alcohols
C. An alcohol and an acid
D. An acid and a base
C. An alcohol and an acid
An example of a dipole molecule
A. CH4
B. H2
C. NaCl
D. H2O
D. H2O
Which of the following is true when the C=C and CEC bords are compared?
A. The triple bond is shorter than the double bond
B. The double bond vibrates at a lower frequency than the triple bond
C. The double bond energy is lower than the triple bond energy
D. Both are composed of sigma and pi bonds
E. All of the above are true
E. All of the above are true
Describe the geometry of CH2Cl2, dichloromethane?
A. linear, polar
B. tetarahedral, nonpolar
C. Tetrahedral, polar
D. Linear, nonpolar
C. Tetrahedral, polar
Which one of the following statements is correct?
A. All essential amino acids are glycogenic
B. Ornithine and citruline are found in tissue proteins
C. Cysteine is an essential amino acid in individuals consuming a diet devoid of methionine
D. In the presence of adequate dietary sources of tyrosine, phenylamine is not an essential amino
C. Cysteine is an essential amino acid in individuals consuming a diet devoid of methionine
To find the angles of a triangle, given only the lengths of the sides, one would use
A. The law of cosines
B. the law of sines
C. the law of tangents
D. the inverse-square lav
A. The law of cosines
- For turbulent flow of a fluid in a pipe, all of the following are true exccpt:
A. The average velocity will be nearly the same as at the pipe center.
B. The energy lost to turbulence and friction varies with kinetic energy.
C. Pipe roughness affects the friction factor.
D. The Reynolds number will be less than 2300.
D. The Reynolds number will be less than 2300.
The ideal Otto cycle consists of which of the following processes?
A. two constant-volume and two isentropic process
B. Two constant-pressure and two isentropic process
C. two constant-volume and two isothermal process
D. two constant-pressure and two isothermal process
A. two constant-volume and two isentropic process
What is the origin of the energy conservation equation. Used in flow system?
A. Newton’s first law of motion
B. Newton’s second law of motion
C. The first law of thermodynamics
D. The second law of thermodynamics
C. The first law of thermodynamics
Which of the following is the basis for Bernoulli’s law for fluid flow?
A. The principle of conservation of mass
B. The principle of conservation of energy
C. The continuity equation
D. Fourier’s law
B. The principle of conservation of energy
A membrane separation process where three component from a liquid phase which is heated, permeates through the membrane and is removed unde low pressure
A. Revere osmossis
B. Dialysis
C. Pervaporation
D. Micro-filtration
C. Pervaporation
Which of the followwing is unit of luminous intensity?
A. Candela
B. Weber
C. Tesla
D. Becquerel
A. Candela
Which of the following is the unit of a magnetic flux?
A. Gray
B. Weber
C. Lumen
D. Lux
B. Weber
The prefix equivalent to 10^-15 is?
A. Nano
B. Pico
C. Femto
D. Atto
C. Femto
The absolute viscosity of a fluid varies with pressure and temperature and is defined as a function of
A. Density and angular deformation rate
B. Density and shear stress
C. Density and shear stress and angular deformation rate
D. Shear stress and angular deformation rate
D. Shear stress and angular deformation rate
Choose the correct statement about family of elements in the periodic table
A. The atoms of all elements in a family have the same number of shells of electrons.
B. All elements in a family have the same physical state
C. All elements in a family have the same chemical reactivity
D. The atoms of all elements in family have the same number of valence electrons.
D. The atoms of all elements in family have the same number of valence electrons.
It is a general method of process control that is especially well suited for difficult, multiinput, multioutput (MIMO) control problems where there are significant interactions between the manipulated inputs and the controlled outputs.
A. adaptive control
B. cascade control
C. fuzzy logic control
D. model predictive control
D. model predictive control
A process control method which is routinely used in most modern computer control system.
A. adaptive control
B. cascade control
C. fuzzy logic control
D. model predictive control
B. cascade control
In substances that sublime, the intermolecular forces of attraction are
A. weak and the vapor pressure is low
B. weak and the vapor pressure is high
C. Strong and thee vapor pressure is low
D. Strong and the vapor pressure is high
B. weak and the vapor pressure is high
Very fine precipites are most easily separated by
A. distillation
B. Filtration
C. Centrifugation
D. Evaporation
C. Centrifugation
Very fine suspended and colloidal impurities in water are removed by a process called
A. Softening
B. Disinfection
C. Coagulation
D. plain sedimentation
C. Coagulation
The colored gas most associated with smog is
A. an oxide of nitrogen
B. An oxide of sulfur
C. An oxide of hydrogen
D. A chloride of slfur
E. A nitride of nitrogen
A. an oxide of nitrogen
A protein is
A. A polysaccharide
B. Deoxyribonucleic acid
C. A polymer of amino acids
D. Soluble because of the carbonyl groups
C. A polymer of amino acids
- The bonding in the benzene molecule, C6H6, in any of its resonance structures, contains
A. 6 sigma bonds and 6 pi bonds
B. 12 sigma bonds and 6 pi bonds
C. 12 sigma bonds and 3 pi bonds
D. 6 sigma bonds and 12 pi bonds
E. Only sigma bonds
C. 12 sigma bonds and 3 pi bonds
Which of the following is most likely to form hydrogen bonds?
A. an alkyne
B. an alcohol
C. an aldehyde
D. a ketone
E. an ether
B. An alcohol
The following compounds have the same number of carbon atoms. Which is expected to have the lowest boiling point?
A. an alkyne
B. an alcohol
C. an aldehyde
D. ketone
E. an ether
A. an alkyne
Which of the following always have a constant percentage of carbon in all of their compounds? (Assume that there are no other functional groups on the molecule)
A. alkenes
B. alcohols
C. Aldehydes
D. Ketones
E. esters
A. alkenes
CH2O is the empirical formula for
A. amino acids
B. proteins
C. Carbohydrates
D. aldehydes
E. DNA and RNA
C. Carbohydrates
Modern automobiles use a catalytic converter to
A. increase horsepower by burning more gasoline
B. complete the combustion of unburned gases
C. convert pollutants into water
D. Absorb pollutantss from the exhaust
E. Cool the exhaust gases
B. complete the combustion of unburned gases
A fluid is flowing on a surface, which contains a component that leaches out to the fluid. Assuming that all the 3 regions of mass transfer are present, in which of these regions is diffusion controlling?
A. Knudsen region
B. buffer region
C. turbulent region
D. viscous sublayer
D. viscous sublayer
In unsteady state mass transfer, the quantity DABt/rm2 is referred to as
A. unaccomplished change
B. relative resistance
C. Relative time
D. Relative position
C. Relative time
If Kx>Ky, then the controlling phase is
A. the liquid phase
B. the gas phase
C. The interface
D. In either film
A. the liquid phase
In two-phase mass transfer, equilibrium may exist
A. at the interface
B. in the gas phas
C. in the liquid phase
D. in either film
A. at the interface
Which is not true at the interphase cf a gas scrubbing operation?
A. the solute concentration of the gas is less than that of the bulk
B. the solute concentration of the liquid is less than that of the bulk
C. the solute concentration of the liquid and gas phase are equal
D. the solute concentration of the gas is greater than the liquid
A. the solute concentration of the gas is less than that of the bulk
In extraction, as the temperature increases, the area of homogeneity (area covered by bimodal curve)
A. decreases
B. increases
C. Remains the same
A. decreases
The suitable evaporator for concentration of foaming
A. long tube evaporator
B. vacuum evaporator
C. short tube evaporator
D. falling film evaporator
A. long tube evaporator
- Macroscopic transfer of mass between moving fluid and surface which is of different concentration is called
A. molecular diffusion
B. convective mass transfer
C. Unsteady stat diffusion
D. All of these
B. convective mass transfer
For packed column the main purpose of packing is to
A. strengthen the column
B. increase the pressure drop in the tower
C. increase the surface area
D. reduce the flow rate across the column
C. increase the surface area
In a gas absorption operation, when the operating line crosses the equilibrium curve
A. the NTU zero
B. the gas flow rate is maximum
C. the liquid flow rate is maximum
D. the number of stages is infinite
D. the number of stages is infinite
The overhead product composition decreases with time in
A. batch distillation with reflux
B. continuous distillation without reflux
C. continuous distillation with reflux
D. distillation operating at total reflux
A. batch distillation with reflux
For a binary mixture with low relativity, continuous rectification to get pure products will require
A. low reflux ratio
B. Less number trays
C. small cross section
D. High reflux ratio
D. High reflux ratio
Chemisorption is
A. the same as van der Waals
B. An irreversible phenomenon
C. characterized by adsorption of heat
D. always in equilibrium
B. An irreversible phenomenon
The current through a metal conductor is proportional to the potential difference between its ends.
A. Coulomb’s law
B. Lens’s law
C. Faraday’s law
D. Ohm’s law
D. Ohm’s law
An electrically neutral object has
A. No charge at all
B. Equal amount of negative and positive charge
C. been stripped of all electrons
D. Been stripped of all protons
B. Equal amount of negative and positive charge
The second is the duration of radiation of what radioactive element?
A. Magnesium
B. Krypton
C. Cesium
D. Platinum
C. Cesium
The sum of the currents that enter a junction equals the sum of the currents that leave the junction.
A. Coulomb’s law
B. Faraday’s law
C. Kirchhoff’s Rule
D. Gaussian theory
C. Kirchhoff’s Rule
The energy content of a charged capacitor resides in its
A. Plates
B. Potential difference
C. Charge
D. Electric fieldd
D. Electric fieldd
The electron volt is a unit of
A. Charge
B. Potencial difference
C. Energy
D. Momentum
C. Energy
The product of force and the time during which it acts is known as:
A. Momentum
B. Velocity
C. Power
D. Impulse
D. Impulse
An upward force (bouyant force) is equal to the weight of the fluid that is being displaced. This principle lies on:
A. Dalton
B. Bernoulli
C. Archimedes
D. Pappus
C. Archimedes
Sound waves does not travel in
A. Air
B. Material medium
C. Vacuum
D. Water
C. Vacuum
The time rate of change of velocity
A. Speed
B. Motion
C. Acceleration
D. Power
C. Acceleration
On a distance-time graph, a horizontal line corresponds to motion at
A. Zero speed
B. Increasing speed
C. Constant speed
D. Decreasing speed
C. Zero speed
On a distance-time graph, a straight line sloping upward to the right corresponds to motion at
A. Zero speed
B. Increasing speed
C. Constant speed
D. Decreasing speed
C. Constant speed
As an airplane climbs
A. Its mass increases
B. Its mass decreases
C. Its weight increases
D. Its weight decreases
D. Its weight decreases
When a horse pulls a wagon, the force that causes the horse to move forward is the force
A. he exerts on the wagon
B. the wagon exerts on him
C. he exerts on the ground
D. the ground exerts on him
D. the ground exerts on him
The action and reaction forces referred to in Newton’s third law of motion
A. Act on the same object
B. Act on different object
C. Need not be equal in magnitude and need not have the same line of action
D. Must be equal in magnitude but need not have the same line in action
B. Act on different object
When an object exerts a normal force on a surface, the force is
A. Equal to the objects weight
B. Frictional in origin
C. Parallel to the surface
D. Perpendicular the surface
D. Perpendicular the surface
To set an object in motion on a surface usually requires
A. less force than to keep it in motion
B. the same force as that needed to keep it in motion
C. More force than to keep it in motion
D. Only as much force as needed to overcome inertia
C. More force than to keep it in motion
The frictional force between two surfaces in contact does not depend on
A. the normal force pressing one against the other
B. The areas of the surfaces
C. If the surfaces are stationary or in relative motion
D. Whether or not a lubricant is used
B. The areas of the surfaces
Which of the following is not a unit of power?
A. Joule-second
B. Watt
C. Newton-meter per sec
D. Horsepower
A. Joule-second
An object at rest may have
A. velocity
B. momentum
C. Kinetic Energy
D. Potential energy
D. Potential energy
An object in motion need not have
A. velocity
B. momentum
C. Kinetic energy
D. Potential energy
D. Potential energy
