MCQs of Chemistry Tests with Answers

MCQs of Chemistry Tests with Answers

Online Chemistry tests preparation for LCC, AFNS in Army, PAF Tests, Navy Officers Tests, General, Marine, Technical Sailor and Navy Civilian Tests are given here. All mcqs of Chemistry tests with answers are given so that you may get 100% success in the initial tests of Pak Army, Navy and PAF Tests.

  • The smallest particle of an element that retains its chemical properties is called a ________.   (Atom)
  • The central, dense region of an atom that contains protons and neutrons is called the ________.  (Nucleus)
  • The number of protons in the nucleus of an atom is called the ________ number. (Atomic)
  • The sum of the number of protons and neutrons in an atom is called the ________ number.  (Mass)
  • Negatively charged particles that orbit the nucleus of an atom are called ________. (Electrons)
  • The region around the nucleus where electrons are likely to be found is called an ________.  (Electron cloud)
  • The total number of protons and neutrons in the nucleus of an atom is called the ________ number.  (Mass)
  • Atoms of the same element that have different numbers of neutrons are called ________.  (Isotopes)
  • The weighted average mass of all naturally occurring isotopes of an element is called the ________ mass.  (Atomic)
  • The number of electrons in an atom that are in the outermost energy level is called the ________ number.  (Valence)
  • The distribution of electrons into energy levels, sublevels, and orbitals in an atom is described by ________.  (Electron configuration)
  • The maximum number of electrons that can occupy a specific energy level is given by the ________ rule.  (Aufbau)
  • The principle that states that no two electrons in an atom can have the same set of quantum numbers is called the ________ principle.  (Pauli exclusion)
  • The principle that states that orbitals of equal energy are occupied by one electron each before pairing occurs is known as ________ principle.  (Hund’s)
  • The phenomenon in which an atom gains or loses electrons to form charged particles is called ________.   (Ionization)
  • The attractive force that holds atoms together in a compound is called ________. (Chemical bond)

See more MCQs of Chemistry Tests for Initial tests below.

MCQs of Chemistry Tests Online Tests Practice

More MCQs of Chemistry tests are given to pass initial tests of Pak Military forces jobs.

  • Chemical bonds formed by the complete transfer of electrons from one atom to another are called ________ bonds.  (Ionic)
  • Chemical bonds formed by the sharing of electrons between atoms are called ________ bonds.  (Covalent)
  • The force of attraction between the oppositely charged ions in an ionic compound is called ________.  (Electrostatic attraction)
  • The sharing of electrons unequally between atoms in a covalent bond leads to the formation of ________.  (Polar covalent bonds)
  • A chemical bond in which electrons are shared equally between atoms is called a ________ bond.  (Nonpolar covalent)
  • The attractive forces between molecules in a substance are called ________ bonds. (Intermolecular)
  • The breaking of chemical bonds and the formation of new bonds to create a different substance is called a ________.  (Chemical reaction)
  • The number written in front of a chemical formula to balance a chemical equation is called a ________.  (Coefficient)
  • The substance that speeds up a chemical reaction without being consumed in the process is called a ________.  (Catalyst)
  • The reaction that absorbs heat energy from the surroundings is called an ________ reaction.  (Endothermic)
  • The reaction that releases heat energy into the surroundings is called an ________ reaction.  (Exothermic)
  • The process by which a solid changes directly into a gas without passing through the liquid state is called ________.  (Sublimation)
  • The process by which a gas changes directly into a solid without passing through the liquid state is called ________.  (Deposition)
  • The reaction in which two or more substances combine to form a single product is called a ________ reaction.  (Combination)
  • The state of matter with definite shape and volume is ________.  (Solid)
  • The state of matter with definite volume but no definite shape is ________.  (Liquid)
  • The state of matter with no definite shape or volume is ________. (Gas)
  • The state of matter that exists at extremely high temperatures where atoms are ionized is ________. (Plasma)
  • The process of a solid changing directly into a gas without passing through the liquid state is called ________.  (Sublimation)
  • The process of a gas changing directly into a solid without passing through the liquid state is called ________. (Deposition)
  • The state of matter that exhibits properties of both a solid and a liquid is ________. (Liquid crystal)
  • The state of matter composed of neutral atoms with low temperatures close to absolute zero is ________. (Bose-Einstein condensate)
  • The state of matter that exhibits properties of both a superconductor and a superfluid is ________.  (Superfluid)
  • The state of matter that consists of particles that are larger than individual molecules but smaller than bulk matter is ________.  (Colloid)
  • The process of a liquid changing into a gas at the surface is called ________. (Evaporation)
  • The process of a liquid changing into a gas throughout its volume is called ________. (Boiling)
  • The state of matter in which the particles are arranged in a regular, repeating pattern is ________.  (Crystalline)
  • The state of matter in which the particles are randomly arranged with no long-range order is ________.  (Amorphous)
  • The state of matter in which the particles are spread apart and have low density is ________.   (Gaseous)
  • A mixture that has a uniform composition and appears as a single phase is called a ________.  (Solution)
  • The substance that is present in the largest amount in a solution is called the ________.  (Solvent)
  • The substance that is dissolved in a solution is called the ________. (Solute)
  • The maximum amount of solute that can dissolve in a given amount of solvent at a specific temperature is called ________.  (Solubility)
  • A solution that contains the maximum amount of solute that can be dissolved at a specific temperature is called a ________ solution.  (Saturated)

See more MCQs of Chemistry Tests for Initial tests below.

Solved MCQs of Chemistry Tests for Forces Tests

More MCQs of Chemistry Tests are given as past experiences of the students who have passed the examination.

  • A solution that contains less solute than the maximum amount that can be dissolved at a specific temperature is called a ________ solution. (Unsaturated)
  • A solution that contains more solute than can normally be dissolved at a specific temperature is called a ________ solution.  (Supersaturated)
  • The process of dissolving a solid in a liquid to form a solution is called ________. (Dissolution)
  • The ability of a solvent to dissolve a particular solute is determined by the ________ forces between the solute and solvent particles. (Intermolecular)
  • The process of separating the components of a mixture based on differences in their boiling points is called ________.  (Distillation)
  • The process of separating the components of a mixture based on differences in their solubilities is called ________.  (Extraction)
  • A homogeneous mixture of two or more metals is called a ________.  (Alloy)
  • A mixture in which the particles of the solute are larger and can be seen with the naked eye is called a ________.  (Suspension)
  • A mixture in which the particles of the solute are intermediate in size between a solution and a suspension is called a ________.  (Colloid)
  • The separation technique that involves passing a mixture through a medium with pores to separate particles based on size is called ________. (Filtration)
  • The process of dissolving a gas in a liquid is called ________.  (Dissolution)
  • The solubility of most solids in water ________ with an increase in temperature. (Increases)
  • The solubility of most gases in water ________ with an increase in temperature. (Decreases)
  • The mathematical relationship between the solubility of a gas in a liquid and the pressure of the gas above the liquid is described by ________ law. (Henry’s)
  • According to Henry’s law, the solubility of a gas in a liquid is directly proportional to the ________ of the gas above the liquid.  (Partial pressure)
  • The law that states that the total pressure of a gas mixture is the sum of the partial pressures of each individual gas in the mixture is called ________ law. (Dalton’s)
  • The mathematical relationship between the pressure, volume, and temperature of a gas is described by ________ law.  (Ideal gas)
  • According to the ideal gas law, the product of pressure and volume is directly proportional to the ________ and ________ of the gas.  (Temperature, amount (moles))
  • The law that states that the volume of a gas is inversely proportional to its pressure at constant temperature is called ________ law.  (Boyle’s)
  • According to Boyle’s law, if the pressure of a gas increases, its volume ________. (Decreases)
  • The law that states that the volume of a gas is directly proportional to its temperature at constant pressure is called ________ law.  (Charles’s)
  • According to Charles’s law, if the temperature of a gas increases, its volume ________.  (Increases)
  • The law that states that the pressure of a gas is directly proportional to its temperature at constant volume is called ________ law. (Gay-Lussac’s)
  • According to Gay-Lussac’s law, if the temperature of a gas increases, its pressure ________.  (Increases)
  • The element with the atomic number 1 and symbol H is ________.  (Hydrogen)
  • The element with the atomic number 6 and symbol C is ________.  (Carbon)
  • The element with the atomic number 8 and symbol O is ________. (Oxygen)
  • The element with the atomic number 17 and symbol Cl is ________.  (Chlorine)
  • The element with the atomic number 26 and symbol Fe is ________. (Iron)
  • The compound with the chemical formula H2O is ________.  (Water)
  • The compound with the chemical formula NaCl is ________.  (Sodium chloride)
  • The compound with the chemical formula CO2 is ________.  (Carbon dioxide)
  • The compound with the chemical formula CH4 is ________.  (Methane)
  • The compound with the chemical formula C6H12O6 is ________.  (Glucose)
  • The compound with the chemical formula NH3 is ________.  (Ammonia)
  • The compound with the chemical formula H2SO4 is ________.  (Sulfuric acid)
  • The compound with the chemical formula CaCO3 is ________.  (Calcium carbonate)
  • The compound with the chemical formula HCl is ________. (Hydrochloric acid)

See more MCQs of Chemistry Tests for Initial tests below.

MCQs of Chemistry Tests for AFNS, LCC, and Navy Initial Tests

See more MCQs of Chemistry tests which will help you to pass the initial tests of Pak Army, Navy and PAF.

  • The compound with the chemical formula NaOH is ________.  (Sodium hydroxide)
  • The element with the atomic number 79 and symbol Au is ________.  ( Gold)
  • The element in Group 17 and Period 2 of the periodic table is ________.  (Fluorine)
  • The element in Period 3 and Group 1 of the periodic table is ________.  (Sodium)
  • The element with the highest electronegativity value on the periodic table is ________.  (Fluorine)
  • The element in the f-block of the periodic table that is commonly used in nuclear power plants is ________. (Uranium)
  • The element in Period 4 and Group 14 that is a semiconductor is ________.  (Silicon)
  • The element with the electron configuration [He]2s22p3 is ________. (Phosphorus)
  • The element with the highest ionization energy on the periodic table is ________. (Helium)
  • The element with the highest melting point on the periodic table is ________. (Tungsten)
  • The element in Period 5 and Group 17 that is a halogen is ________.  (Iodine)
  • An organic compound that contains only carbon and hydrogen is called a ________. (Hydrocarbon)
  • The process of breaking a large molecule into smaller fragments by heating it is called ________.  (Pyrolysis)
  • The functional group characterized by a carbon-oxygen double bond is called a ________.  (Carbonyl)
  • The reaction in which a nucleophile attacks an electrophile, resulting in the formation of a new covalent bond, is called ________.  (Nucleophilic substitution)
  • The reaction in which a compound is broken down into smaller molecules by the addition of water is called ________.  (Hydrolysis)
  • The reaction in which a compound is formed by the combination of two or more reactants with the elimination of a small molecule, such as water, is called ________.  (Condensation)
  • The reaction in which a compound is converted into a different compound through the addition of a functional group is called ________.  (Functional group transformation)
  • The compound formed by the reaction of an acid with an alcohol is called an ________.  (Ester)
  • The compound formed by the reaction of an acid with a base is called a ________. (Salt)
  • The reaction in which a compound is converted into a different compound through the addition of a halogen is called ________.  (Halogenation)
  • The reaction in which a compound is converted into a different compound through the addition of hydrogen is called ________.  (Hydrogenation)
  • The process of separating a mixture of compounds based on their differing affinities for a stationary phase and a mobile phase is called ________. (Chromatography)
  • The compound that donates a pair of electrons to form a covalent bond with an electrophile is called a ________.  (Nucleophile)
  • The compound that accepts a pair of electrons to form a covalent bond with a nucleophile is called an ________.  (Electrophile)
  • The study of the three-dimensional arrangement of atoms in molecules and the effects of this arrangement on chemical reactivity is called ________. (Stereochemistry)

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