A reduction reaction always involves the: w) loss of electrons x) gain of electrons y) addition of oxygen z) removal of oxygen

A reduction reaction always involves the: w) loss of electrons x) gain of electrons y) addition of oxygen z) removal of oxygen
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ANSWER: X -- GAIN OF ELECTRONS
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Oxidation is a process which involves the 1. Loss of electrons 2. Gain of oxygen 3. Gain of electrons 4. Loss of oxygen The correct answers are: (a) 1 and 2 (b) 2 and 4 (c) 2 and 3 (d) 3 and 4

Description : Oxidation is a process which involves the 1. Loss of electrons 2. Gain of oxygen 3. Gain of electrons 4. Loss of oxygen The correct answers are: (a) 1 and 2 (b) 2 and 4 (c) 2 and 3 (d) 3 and 4

Last Answer : Ans:(c)

A metal ball on an insulated stand is touched by a positively charged glass rod. What happens to the metal ball? Does it w) gain protons and lose electrons x) gain protons y) gain more protons than electrons z) lose electrons

Description : A metal ball on an insulated stand is touched by a positively charged glass rod. What happens to the metal ball? Does it w) gain protons and lose electrons x) gain protons y) gain more protons than electrons z) lose electrons

Last Answer : ANSWER: Z -- LOSE ELECTRONS

What is the process by which an atom gains electrons? w) Reduction x) Neutralization y) Electrolysis z) Oxidation

Description : What is the process by which an atom gains electrons? w) Reduction x) Neutralization y) Electrolysis z) Oxidation

Last Answer : ANSWER: W -- REDUCTION

Molecular oxygen is said to be paramagnetic. This indicates that molecular oxygen: w) is a gas at room temperature x) forms molecules containing two oxygen atoms y) has an approximate molecular weight of 32 z) has unpaired electrons

Description : Molecular oxygen is said to be paramagnetic. This indicates that molecular oxygen: w) is a gas at room temperature x) forms molecules containing two oxygen atoms y) has an approximate molecular weight of 32 z) has unpaired electrons

Last Answer : ANSWER: Z -- HAS UNPAIRED ELECTRONS

Unpaired electrons are present in ground-state ato of: w) Helium x) Calcium y) Oxygen z) Magnesium

Description : Unpaired electrons are present in ground-state ato of: w) Helium x) Calcium y) Oxygen z) Magnesium

Last Answer : ANSWER: Y -- OXYGEN

Which one of the following atoms has two unpaired electrons in its ground state: w) Sodium x) Calcium y) Oxygen z) Aluminum

Description : Which one of the following atoms has two unpaired electrons in its ground state: w) Sodium x) Calcium y) Oxygen z) Aluminum

Last Answer : ANSWER: Y -- OXYGEN

A cobalt chloride solution soaked into a piece of cotton can be used as an indicator for changes in humidity levels. Pink indicates a high-humidity environment and blue a low-humidity environment. What are these color changes caused by: w) The ionization and reduction of the cobalt plus two slash cobalt plus three couple. x) The vaporization and redeposition of cobalt chloride. y) The loss and readsorption of the cobalt's waters of hydration. z) This is an illustration of the Schrodinger principle.

Description : A cobalt chloride solution soaked into a piece of cotton can be used as an indicator for changes in humidity levels. Pink indicates a high-humidity environment and blue a low-humidity environment. What ... the cobalt's waters of hydration. z) This is an illustration of the Schrodinger principle.  

Last Answer : ANSWER: Y -- THE LOSS AND READSORPTION OF THE COBALT'S WATERS OF HYDRATION.

Chemical reaction that involves the gain of electrons?

Description : Chemical reaction that involves the gain of electrons?

Last Answer : Reduction

What property of a metal describes the onset of plastic deformation in a tensile test? w) tensile strength x) elongation y) yield strength z) reduction in area

Description : What property of a metal describes the onset of plastic deformation in a tensile test? w) tensile strength x) elongation y) yield strength z) reduction in area

Last Answer : ANSWER: Y -- YIELD STRENGTH

Which of the following reactions involve NEITHER oxidation nor reduction? w) burning antimony in chlorine x) decomposition of potassium chlorate y) reaction of sodium with water z) reaction of potassium hydroxide with nitric acid

Description : Which of the following reactions involve NEITHER oxidation nor reduction? w) burning antimony in chlorine x) decomposition of potassium chlorate y) reaction of sodium with water z) reaction of potassium hydroxide with nitric acid

Last Answer : ANSWER: Z -- REACTION OF POTASSIUM HYDROXIDE WITH NITRIC ACID  

The dominant charge carriers in p-type semiconductors are: w) neutrons x) electrons y) protons z) holes

Description : The dominant charge carriers in p-type semiconductors are: w) neutrons x) electrons y) protons z) holes

Last Answer : ANSWER: Z -- HOLES

The magnitude of the quarks' electric charge is: w) zero. x) greater than the electron's charge. y) equal to the electron's charge. z) less than the electron's charge.

Description : The magnitude of the quarks' electric charge is: w) zero. x) greater than the electron's charge. y) equal to the electron's charge. z) less than the electron's charge.

Last Answer : ANSWER: Z -- LESS THAN THE ELECTRON'S CHARGE. 

Photoelectric electricity is produced directly from solar energy when which of the following are absorbed in a semiconductor to create an electric current? w) protons x) electrons y) neutrons z) photons

Description : Photoelectric electricity is produced directly from solar energy when which of the following are absorbed in a semiconductor to create an electric current? w) protons x) electrons y) neutrons z) photons

Last Answer : ANSWER: Z -- PHOTONS

When radiation breaks an electron pair bond in a molecule and each fragment of the molecule gets one of the bond electrons, the molecular fragments that are formed are called: w) ions x) free radicals y) stable molecules z) gases

Description : When radiation breaks an electron pair bond in a molecule and each fragment of the molecule gets one of the bond electrons, the molecular fragments that are formed are called: w) ions x) free radicals y) stable molecules z) gases

Last Answer : ANSWER: X -- FREE RADICALS

A space ship traveling toward Mars at 0.6 times the speed of light c shoots an ELECTRON beam at Mars. If the electrons travel at 0.6 c RELATIVE TO THE SPACE SHIP, at what speed do the electrons impact the surface of Mars? w) 0.6 c x) 0.88 c y) 1.2 c z) 1.34 c

Description : A space ship traveling toward Mars at 0.6 times the speed of light c shoots an ELECTRON beam at Mars. If the electrons travel at 0.6 c RELATIVE TO THE SPACE SHIP, at what speed do the electrons impact the surface of Mars? w) 0.6 c x) 0.88 c y) 1.2 c z) 1.34 c

Last Answer : ANSWER: X -- 0.88 c

A characteristic of the noble gases is that they all: w) have eight electrons in the outer shell x) have low stability y) form many compounds z) have filled outer electron shells

Description : A characteristic of the noble gases is that they all: w) have eight electrons in the outer shell x) have low stability y) form many compounds z) have filled outer electron shells

Last Answer : ANSWER: Z -- HAVE FILLED OUTER ELECTRON SHELLS

An element has the following numbers of electrons in its shells: 2-8-8-2. Which of the following is true? The element: w) is a nonmetal x) forms an ion with a charge of +2 y) can accept two electrons z) forms a negative ion

Description : An element has the following numbers of electrons in its shells: 2-8-8-2. Which of the following is true? The element: w) is a nonmetal x) forms an ion with a charge of +2 y) can accept two electrons z) forms a negative ion

Last Answer : ANSWER: X -- FORMS AN ION WITH A CHARGE OF +2

If two atoms exert equal attractions for electrons, they can form: w) a nonpolar covalent bond x) an ionic bond y) a polar covalent bond z) no bond

Description : If two atoms exert equal attractions for electrons, they can form: w) a nonpolar covalent bond x) an ionic bond y) a polar covalent bond z) no bond

Last Answer : ANSWER: W -- A NONPOLAR COVALENT BOND

A high voltage applied to a gas discharge tube containing neon gas at very low pressure causes a current to flow through the tube. Which one of the following are the particles that flow towards the cathode? Are they w) electrons x) protons y) negatively charged neon ions z) positively charged neon ions

Description : A high voltage applied to a gas discharge tube containing neon gas at very low pressure causes a current to flow through the tube. Which one of the following are the particles that flow towards the ... Are they w) electrons x) protons y) negatively charged neon ions z) positively charged neon ions

Last Answer : ANSWER: Z -- POSITIVELY CHARGED NEON IONS

In N-type semiconductors the majority of the carriers are: w) holes x) electrons y) protons z) neutrons

Description : In N-type semiconductors the majority of the carriers are: w) holes x) electrons y) protons z) neutrons 

Last Answer : ANSWER: X -- ELECTRONS

The wave nature of electrons was EXPERIMENTALLY verified by: w) Einstein x) Davisson and Germer y) Balmer z) Bohr.

Description : The wave nature of electrons was EXPERIMENTALLY verified by: w) Einstein x) Davisson and Germer y) Balmer z) Bohr.

Last Answer : ANSWER: X -- DAVISSON AND GERMER

Which one of the following particles travels at the speed of light? w) neutrons x) electrons y) photons z) muons

Description : Which one of the following particles travels at the speed of light? w) neutrons x) electrons y) photons z) muons

Last Answer : ANSWER: Y -- PHOTONS 

Isotopes of an element have different numbers of: w) electrons x) protons y) neutrons z) leptons

Description : Isotopes of an element have different numbers of: w) electrons x) protons y) neutrons z) leptons

Last Answer : ANSWER: Y -- NEUTRONS

The photomultiplier tube in the scintillation counter multiplies one of the following. Does it multiply: w) scintillations x) electrons y) ions z) photons

Description : The photomultiplier tube in the scintillation counter multiplies one of the following. Does it multiply: w) scintillations x) electrons y) ions z) photons

Last Answer : ANSWER: X -- ELECTRONS

A P-type semiconductor is doped to produce one of the following. Will it produce: w) both holes and electrons x) positive electrons y) negative electrons z) holes

Description : A P-type semiconductor is doped to produce one of the following. Will it produce: w) both holes and electrons x) positive electrons y) negative electrons z) holes

Last Answer : ANSWER: Z -- HOLES

The idea that electrons revolved in orbits around the nucleus of an atom without radiating energy away from the atom was postulated by: w) Thompson x) Bohr y) Rutherford z) Einstein

Description : The idea that electrons revolved in orbits around the nucleus of an atom without radiating energy away from the atom was postulated by: w) Thompson x) Bohr y) Rutherford z) Einstein

Last Answer : ANSWER: X -- BOHR

During an INELASTIC collision, the colliding bodies w) lose kinetic energy x) keep the same amount of kinetic energy y) gains kinetic energy z) first lose, then gain kinetic energy

Description : During an INELASTIC collision, the colliding bodies w) lose kinetic energy x) keep the same amount of kinetic energy y) gains kinetic energy z) first lose, then gain kinetic energy

Last Answer : ANSWER: W -- LOSE KINETIC ENERGY

When a charge moves through an electric circuit in the direction of an electric force it does one of the following four things. Does it: w) lose potential energy and gain kinetic energy x) gain potential energy and lose kinetic energy y) lose both potential and kinetic energy z) gain both potential and kinetic energy

Description : When a charge moves through an electric circuit in the direction of an electric force it does one of the following four things. Does it: w) lose potential energy and gain kinetic energy x) ... lose kinetic energy y) lose both potential and kinetic energy z) gain both potential and kinetic energy

Last Answer : ANSWER: W -- LOSE POTENTIAL ENERGY AND GAIN KINETIC ENERGY

Regulation of some enzymes by covalent modification involves addition or removal of (A) Acetate (B) Sulphate (C) Phosphate (D) Coenzyme

Description : Regulation of some enzymes by covalent modification involves addition or removal of (A) Acetate (B) Sulphate (C) Phosphate (D) Coenzyme

Last Answer : Answer : C

What happens in a reduction reaction? (1) addition of Oxygen (2) addition of Nitrogen (3) addition of Hydrogen (4) None of the above

Description : What happens in a reduction reaction? (1) addition of Oxygen (2) addition of Nitrogen (3) addition of Hydrogen (4) None of the above

Last Answer : (3) addition of Hydrogen Explanation: In terms of Oxygen transfer, oxidation is gain of oxygen; reduction is loss of oxygen. However, in terms of hydrogen transfer, oxidation is loss of hydrogen, reduction is gain of hydrogen.

Chemical reaction that involves the loss of electrons?

Description : Chemical reaction that involves the loss of electrons?

Last Answer : Oxidation

What is the molecular mass of a gas that effuses through a small hole at twice the rate as oxygen gas at the same temperature. (The molecular mass of O2 is 32.) w) 8.0 atomic mass units x) 16 atomic mass units y) 48 atomic mass units z) 64 atomic mass units

Description : What is the molecular mass of a gas that effuses through a small hole at twice the rate as oxygen gas at the same temperature. (The molecular mass of O2 is 32.) w) 8.0 atomic mass units x) 16 atomic mass units y) 48 atomic mass units z) 64 atomic mass units

Last Answer : ANSWER: W -- 8.0 ATOMIC MASS UNITS

Alpha particles are nuclei of: w) hydrogen x) helium y) oxygen z) nitrogen

Description : Alpha particles are nuclei of: w) hydrogen x) helium y) oxygen z) nitrogen

Last Answer : ANSWER: X -- HELIUM

If the resultant force acting on a body of constant mass is zero, the body's acceleration is: w) increasing x) decreasing y) always zero z) negative.

Description : If the resultant force acting on a body of constant mass is zero, the body's acceleration is: w) increasing x) decreasing y) always zero z) negative.

Last Answer : ANSWER: Y -- ALWAYS ZERO 

A body which is attached to a spring undergoes simple harmonic motion. The magnitude of the body's acceleration is: w) constant x) proportional to its displacement from its equilibrium position y) zero z) always increasing.

Description : A body which is attached to a spring undergoes simple harmonic motion. The magnitude of the body's acceleration is: w) constant x) proportional to its displacement from its equilibrium position y) zero z) always increasing.

Last Answer : ANSWER: X -- PROPORTIONAL TO ITS DISPLACEMENT FROM ITS EQUILIBRIUM POSITION 

An object in equilibrium always has zero: w) velocity x) momentum y) mass z) acceleration.

Description : An object in equilibrium always has zero: w) velocity x) momentum y) mass z) acceleration.

Last Answer : ANSWER: Z -- ACCELERATION

Liquid "X" is at equilibrium with its vapor in a cylinder and piston apparatus. When the volume of the space above the liquid is 50 ml and the temperature 25!, the vapor pressure of "X" is 120 torr. What will the vapor pressure of "X" be when the volume above the liquid is 100 ml and the temperature 25!C? Some liquid is always present. w) 30 torr x) 60 torr y) 120 torr z) 240 torr

Description : Liquid "X" is at equilibrium with its vapor in a cylinder and piston apparatus. When the volume of the space above the liquid is 50 ml and the temperature 25!, the vapor pressure of "X" is 120 torr. What will the ... 25!C? Some liquid is always present. w) 30 torr x) 60 torr y) 120 torr z) 240 torr

Last Answer : ANSWER: Y -- 120 TORR

When a solid material is heated, it always: w) emits a discrete radiation spectrum x) glows red y) emits a continuous radiation spectrum z) emits only visible radiation

Description : When a solid material is heated, it always: w) emits a discrete radiation spectrum x) glows red y) emits a continuous radiation spectrum z) emits only visible radiation

Last Answer : ANSWER: Y -- EMITS A CONTINUOUS RADIATION SPECTRUM

A virtual image always appears: w) larger than object x) inverted y) erect z) same size as object

Description : A virtual image always appears: w) larger than object x) inverted y) erect z) same size as object

Last Answer : ANSWER: Y -- ERECT

In an elastic collision, the RELATIVE velocities of separation of the two bodies after impact compared with the relative velocity of approach before impact is: w) always greater x) always smaller y) always the same z) first greater, then smaller

Description : In an elastic collision, the RELATIVE velocities of separation of the two bodies after impact compared with the relative velocity of approach before impact is: w) always greater x) always smaller y) always the same z) first greater, then smaller

Last Answer : ANSWER: Y -- ALWAYS THE SAME

An electromagnetic wave is ALWAYS: w) longitudinal x) polarized y) spherical z) transverse.

Description : An electromagnetic wave is ALWAYS: w) longitudinal x) polarized y) spherical z) transverse.

Last Answer : ANSWER: Z -- TRANSVERSE

In a collision, which of the following four quantities is always conserved? w) momentum x) kinetic energy y) torque z) moment of inertia

Description : In a collision, which of the following four quantities is always conserved? w) momentum x) kinetic energy y) torque z) moment of inertia

Last Answer : ANSWER: W -- MOMENTUM

A real image always appears: w) larger than object x) inverted y) erect z) same size as object

Description : A real image always appears: w) larger than object x) inverted y) erect z) same size as object

Last Answer : ANSWER: X -- INVERTED

The neutrons in an atom: w) are part of the nuclear charge x) rotate about the nucleus in elliptical orbits y) vary in number with different isotopes z) are always equal in number to the total number of protons

Description : The neutrons in an atom: w) are part of the nuclear charge x) rotate about the nucleus in elliptical orbits y) vary in number with different isotopes z) are always equal in number to the total number of protons

Last Answer : ANSWER: Y -- VARY IN NUMBER WITH DIFFERENT ISOTOPES 

If the resultant force acting on a body of constant mass is zero, the body's momentum is: w) increasing x) decreasing y) always zero z) constant

Description : If the resultant force acting on a body of constant mass is zero, the body's momentum is: w) increasing x) decreasing y) always zero z) constant

Last Answer : ANSWER: Z -- CONSTANT

As defined in physics, work is: w) a scalar quantity x) always a positive quantity y) a vector quantity z) always zero

Description : As defined in physics, work is: w) a scalar quantity x) always a positive quantity y) a vector quantity z) always zero

Last Answer : ANSWER: W -- A SCALAR QUANTITY

The work done by a friction force is: w) always positive x) always negative y) always zero z) either positive or negative depending upon the situation.

Description : The work done by a friction force is: w) always positive x) always negative y) always zero z) either positive or negative depending upon the situation. 

Last Answer : ANSWER: X -- ALWAYS NEGATIVE

In commercial vulcanization, crosslinking is introduced by the addition of: w) sulfur x) toluene y) silicon z) phosphorus

Description : In commercial vulcanization, crosslinking is introduced by the addition of: w) sulfur x) toluene y) silicon z) phosphorus

Last Answer : ANSWER: W -- SULFUR

For a DC motor, what major component in addition to the field winding and the armature winding is necessary? w) a commutator x) a stator y) a battery z) a rotor

Description : For a DC motor, what major component in addition to the field winding and the armature winding is necessary? w) a commutator x) a stator y) a battery z) a rotor

Last Answer : ANSWER: W -- A COMMUTATOR

In the fission of U235, what is the average number of neutrons produced in the fission reaction? w) 1.5 x) 2.5 y) 3.5 z) 4.5

Description : In the fission of U235, what is the average number of neutrons produced in the fission reaction? w) 1.5 x) 2.5 y) 3.5 z) 4.5

Last Answer : ANSWER: X -- 2.5