MCQ in General Chemistry Part 16 | ECE Board Exam

This is the Multiple Choice Questions Part 16 of the Series in General Chemistry as one of the General Engineering and Applied Sciences (GEAS) topics. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize yourself with each and every question compiled here taken from various sources including past Board Questions in General Engineering and Applied Sciences (GEAS) field.

Continue Practice Exam Test Questions Part 16 of the Series

⇐ MCQ in General Chemistry Part 15 | ECE Board Exam

Choose the letter of the best answer in each question.

751. Acids will turn litmus paper to what color?

A. Blue

B. Red

C. Green

D. Yellow

752. The electrolyte in a lead-acid battery is a solution of water and _________.

A. Hydrochloric acid

B. Nitric acid

C. Sulfuric acid

D. Sodium chloride

753. Which of the following refers to a measure of the quantity of an element or compound?

A. Mole

B. Atomic number

C. Valency

D. Avogadro’s number

754. When the charge of an atom becomes unbalanced, the charged atom is called _______.

A. Proton

B. Electron

C. Neutron

D. Ion

755. What type of reaction involves breaking down a compound into simpler substances due to heat or energy?

A. Combination

B. Decomposition

C. Neutralization

D. Single displacement

756. What do you call the elements in the first two groups in the periodic table?

A. Noble gases

B. Light metals

C. Transition metals

D. Heavy metals

757. The number of protons in the nucleus of an atom is called the _______.

A. Atomic mass

B. Atomic number

C. Valency

D. Mole

758. What do you call the electrons in the outermost shell of an atom?

A. Core electrons

B. Free electrons

C. Valence electrons

D. Internal electrons

759. What is the smallest part of matter?

A. Atom

B. Molecule

C. Particle

D. Proton

760. Which group in the periodic table contains the most strongly electronegative elements?

A. Group IIA

B. Group IIIA

C. Group VIA

D. Group VIIA

761. What process occurs when excess solute settles at the bottom of a saturated solution?

A. Evaporation

B. Precipitation

C. Condensation

D. Sublimation

762. Why do chemical reactions generally proceed faster at higher temperatures?

A. Molecules slow down

B. Activation energy increases

C. More frequent and energetic collisions occur

D. The reaction becomes endothermic

763. Which subatomic particle has no charge?

A. Proton

B. Electron

C. Neutron

D. Ion

764. What is the maximum number of electrons that can be accommodated in the valence shell of an atom?

A. 2

B. 4

C. 6

D. 8

765. How are metals containing atoms with less than four valence electrons classified?

A. Conductor

B. Semiconductor

C. Insulator

D. Dielectric

766. Sublimation is a direct phase change from:

A. Liquid to gas

B. Solid to gas

C. Gas to liquid

D. Solid to liquid

767. What is the term for the attraction between like molecules?

A. Adhesion

B. Cohesion

C. Surface tension

D. Capillary action

768. Halogens belong to which group in the periodic table?

A. Group IIIA

B. Group IVB

C. Group VIA

D. Group VIIA

769. What type of bonding is responsible for weak intermolecular attractions, such as in noble gases?

A. Covalent bonding

B. Ionic bonding

C. Van der Waals bonding

D. Metallic bonding

770. What is the negatively charged component of an atom?

A. Proton

B. Neutron

C. Electron

D. Ion

771. During a complete or partial neutralization of acids, what is the ionic compound formed?

A. Base

B. Salt

C. Metal

D. Water

772. What type of bond results from the sharing of electrons by two atoms?

A. Ionic bond

B. Covalent bond

C. Metallic bond

D. Hydrogen bond

773. Which of the following elements is unstable in its pure form?

A. Gold (Au)

B. Sodium (Na)

C. Carbon (C)

D. Iron (Fe)

774. What do you call materials that do not conduct electric current?

A. Conductor

B. Semiconductor

C. Insulator

D. Electrolyte

775. The opposite of alkali is:

A. Base

B. Acid

C. Salt

D. Neutral

776. The amount of electricity a battery can produce is controlled by:

A. The type of electrodes

B. The temperature

C. The strength of the acid

D. The voltage

777. Which one refers to the number of gram-moles of solute per liter of solution?

A. Molarity

B. Normality

C. Molality

D. Density

778. If an atom contains more than four valence electrons, the material is classified as a/an:

A. Conductor

B. Semiconductor

C. Insulator

D. Dielectric

779. Applying a greater pressure causes pure solvent to leave the solution. What is this process called?

A. Filtration

B. Reverse osmosis

C. Distillation

D. Evaporation

780. What type of bonding occurs in metals when metal atoms lose electrons and the metallic ions are attracted to a “sea” of delocalized electrons?

A. Ionic bonding

B. Covalent bonding

C. Hydrogen bonding

D. Metallic bonding

781. Which of the following elements is NOT radioactive?

A. Uranium (U)

B. Cobalt (Co)

C. Radium (Ra)

D. Plutonium (Pu)

782. Which of the following refers to nucleic acid that stores genetic information?

A. RNA

B. ATP

C. DNA

D. Protein

783. During chemical reactions, bonds between atoms are broken and new bonds are usually formed. What do you call the starting substances?

A. Products

B. Reactants

C. Catalysts

D. Elements

784. What do you call solutions having the same osmotic pressure?

A. Hypertonic solutions

B. Isotonic solutions

C. Hypotonic solutions

D. Saturated solutions

785. What is the term used to describe hydrocarbons containing only single covalent bonds between carbon atoms?

A. Alkanes

B. Alkenes

C. Alkynes

D. Aromatic compounds

786. Which of the following will occur if a substance is oxidized?

A. It gains electrons

B. It loses electrons

C. It absorbs energy

D. It becomes neutral

787. Another name for dielectric material is:

A. Semiconductor

B. Conductor

C. Insulator

D. Electrolyte

788. Which of the following refers to the change from gaseous to liquid phase?

A. Evaporation

B. Condensation

C. Sublimation

D. Fusion

789. One of the following statements is incorrect. Which one?

A. The mass of a neutron is approximately equal to a proton.

B. The mass of an electron is negligible compared to a proton.

C. The mass of an electron is heavier than that of a proton.

D. Protons and neutrons are found in the nucleus.

790. A deuteron is:

A. An electron pair

B. A nucleus containing one neutron and one proton

C. A hydrogen ion

D. A neutral particle

791. What is the pH range of a base?

A. 0 – 7

B. 7 – 14

C. 4 – 7

D. 6 – 8

792. When different phases (solid, liquid, or gas) are present in a heterogeneous mixture, the method of separation used is:

A. Filtration

B. Crystallization

C. Distillation

D. Evaporation

793. What is the conversion of liquid into gaseous state?

A. Condensation

B. Sublimation

C. Evaporation

D. Melting

794. What refers to the property of a substance that changes when the amount of the substance changes?

A. Intensive property

B. Extensive property

C. Physical property

D. Chemical property

795. The air we breathe is an example of a:

A. Compound

B. Mixture

C. Element

D. Pure substance

796. What is the atomic number of helium?

A. 1

B. 2

C. 8

D. 10

797. How are all B families and group VIII in the periodic table classified?

A. Alkali metals

B. Transition metals

C. Noble gases

D. Metalloids

798. What is the strongest type of chemical bond?

A. Ionic bond

B. Covalent bond

C. Hydrogen bond

D. Metallic bond

799. The formula for Dinitrogen Pentoxide is:

A. NO2

B. N2O5

C. N2O3

D. N2O4

800. What is the smallest whole unit of an element?

A. Molecule

B. Proton

C. Atom

D. Ion

Complete List of MCQs in General Engineering and Applied Science per topic