What is the maximum number of electrons that can fit into a “p” orbital?

In oxidation-reduction or redox reactions, the component supplying the electrons is called the

The word “atom” comes from the Greek word “atomos” which means

The horizontal arrangement of elements of increasing atomic number in a periodic table is called:

Sound waves with frequencies greater than 20,000 Hz are

Lux is the unit of which physical quantity?

The mass that enters into a chemical reaction remains the unchanged as a result of the reaction. In precise form: mass is neither created nor destroyed. This is known as:

The root mean square speed of the molecules of a gas is

When an increase in speed doubles the kinetic energy of a moving body, its momentum

The mass of a proton is about how many times the mass of an electron?

In a burning candle, the coldest part of the flame is

Which of the following statements is correct concerning the passage of white light into a glass prism?

If a more active element replaces a less active one in a compound, the reaction is:

Unit of pressure in vacuum technology is:

What is impulse?

The chemical name for baking soda i

Under normal state, an atom is said to be

The anions and cations which are unaffected by the reaction in solution are called

The dry air is composed of ___ percent of nitrogen

It is hotter over the top of a fire than at the same distance on the sides because of:

According to this law, “The force between two charges varies directly as the magnitude of each charge and inversely as the square of the distance between them.”

A thermometer for measuring very low temperature is called:

The emission of electrons from matter by electromagnetic radiation of certain energy is known as:

The number of orbiting electrons is normally ________the number of protons in the nucleus of an atom.

The ratio of the density of the test liquid to the density of a reference liquid is called:

What is the S.I. unit of electric field strength?

The energy stored in a stretched elastic material such as spring is

What kind of chemical bond will form in binary compounds where the electronegativity difference between atoms is less than 1.5?

If the number of gas molecule is doubled in a certain volume of gas the pressure

It describes the luminous flux incidence per unit area and is expressed in lumens per square meter.

The isotope of hydrogen is

Sound waves with frequencies less than 2 Hz are

Sound above the frequency of 20,000 Hz is called

The power of a lens is measured in

When a source of sound approaches you, you detect an increase in its

The gases that rarely take part in a chemical reaction are called

The word proton comes from the Greek word “proteios” meaning

Light has both a wave nature and a particle nature. Light behaves primarily as a particle when it

The mass of an alpha α particle is how many times more than that of the electron?

What drives a nail into wood when struck by a hammer?

When common salt is sprinkled on ice the temperature of ice

Sound waves in air are

A positive ion is called

Which is the most abundant element in the human body?

The minimum temperature which can be measured with a mercury thermometer is

Which group of the periodic table is known as the alkali metals?

A singer holds a high note and shatters a distant crystal glass. This phenomenon best demonstrates

If a single reactant is transformed by heat or electricity into two or more products, the type of reaction is

The earth’s crust consists of ___ % of oxygen.

The pairs of electrons not shared in the covalent bond are called

Cohesion is the attraction between like _______.

The chemical formula which shows the relative number of atoms of all the elements present in a compound is called

Rutherford model of an atom had failed to explain

The components resulting from the reactions are called

A wave in which the particles of the material move up and down as the wave goes from left to right is called a

A mercury thermometer is constructed at

The isotopes of an element differ in the number of

In burning a candle, the flame is

The density of water is

Bending of light beams around the corner of an obstacle is called:

Heat will flow from one body to another in thermal contact with it, when they differ in

Imagine you’re standing on the surface of a shrinking planet. If it shrinks to one-tenth its original radius with no change in mass, on the shrunken surface you’d weigh

An instrument for measuring focal length of a lens is called:

When the two waves of the same frequency speed and amplitude traveling in opposite directions are superimposed,

Which group of the periodic table is known as the noble gases?

Which of the following is true? the density of water

A covalent bond between atoms of identical electronegativity is called

Electron was discovered by

A formula which describes only the numbers of each element in the molecule is called

The concept that electrons revolve around the nucleus in specific paths called orbits or energy levels was proposed by

What kind of chemical bond will form in binary compounds where the electronegativity difference between atoms is greater than 2.0

When the pitch of a note is raised then, its

These are compounds containing water molecules loosely bound to the other components.

Sound travel faster in which of the following medium?

Atoms or ions which have the same electronic configuration

At what temperature do both the centigrade and Fahrenheit thermometers show the same reading?

The horizontal arrangement of elements of increasing atomic number in a periodic table is called

The amount of heat which is absorbed during the change of state of a substance without rise in its temperature is called its

What is measured in the Richter Scale?

The portion above a candle flame is hotter than at the sides. This is due to

What kind of chemical bond will form in binary compounds where the electronegativity difference between atoms is less than 1.5?

A virtual image formed by a mirror (any type) is

The vertical arrangement of elements in the periodic table is called

The elements that a compound is composed of are present in fixed and precise proportion by mass. This is known as:

The forces that hold atoms together are called

A spacecraft on its way from Earth to the Moon is pulled equally by Earth and the Moon when it is

An instrument that separates particles of different isotopic composition and measure their individual relative masses.

Name the phenomenon in which a ray of light suffers change of direction when it enter another medium:

When a substance is heated, its

The chemical formula which shows the exact numbers of atoms of all the elements present in a compound is called

Name the device for detecting and measuring small amount of thermal energy:

A negative ion is called

The liberation of heat by the passage of a current through an electric conductor due to its resistance is known as:

In oxidation-reduction or redox reactions, the component receiving the electrons is called

The atoms having different atomic numbers but the same mass number are called

A reaction in which heat is absorbed is called

Which of these is not a unit of energy

The emission of light by a material because of its high temperature is known as:

Which of the following thermometers is best suited for measuring a temperature of nearly 1500oC?

The instrument, which measures temperature by radiation, is called