MCQ in General Chemistry Part 17 | ECE Board Exam

This is the Multiple Choice Questions Part 17 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 17 of the Series

⇐ MCQ in General Chemistry Part 16 | ECE Board Exam

Choose the letter of the best answer in each question.

801. The elements in Group 0 in the periodic table are called _________.

A. Alkali metals

B. Halogens

C. Noble gases

D. Transition metals

802. Which of the following groups in the periodic table contains the most weakly electronegative elements?

A. Group IA

B. Group IIIA

C. Group VIA

D. Group VIIA

803. The oxidation state of elements in their natural form is always:

A. +1

B. -1

C. 0

D. +2

804. What is the process in which a gas changes into a solid without passing through the liquid phase?

A. Evaporation

B. Sublimation

C. Deposition

D. Condensation

805. What do you call the energy required to remove an electron from an atom?

A. Ionization energy

B. Activation energy

C. Binding energy

D. Potential energy

806. The scientist who formulated the modern atomic theory is:

A. John Dalton

B. Dmitri Mendeleev

C. Marie Curie

D. Niels Bohr

807. What is the main component of natural gas?

A. Butane

B. Methane

C. Propane

D. Ethane

808. Which of the following has the lowest density?

A. Solids

B. Liquids

C. Gases

D. Plasmas

809. What type of chemical reaction occurs when an acid and a base react to form salt and water?

A. Combustion

B. Neutralization

C. Oxidation

D. Decomposition

810. Which gas is used in light bulbs to prevent filament oxidation?

A. Oxygen

B. Nitrogen

C. Argon

D. Hydrogen

811. The atomic mass of an element is approximately equal to the sum of:

A. Protons and electrons

B. Neutrons and electrons

C. Protons and neutrons

D. Electrons and orbitals

812. Which of the following is the lightest noble gas?

A. Neon

B. Argon

C. Helium

D. Krypton

813. The pH of pure water at 25°C is:

A. 0

B. 7

C. 10

D. 14

814. What is the most abundant gas in Earth’s atmosphere?

A. Oxygen

B. Carbon dioxide

C. Nitrogen

D. Hydrogen

815. Which metal is commonly used in making batteries?

A. Copper

B. Zinc

C. Aluminum

D. Gold

816. The most common oxidation state of oxygen is:

A. +1

B. +2

C. -1

D. -2

817. What is the only metal that is liquid at room temperature?

A. Mercury

B. Lead

C. Gallium

D. Tin

818. What is the chemical formula for ammonia?

A. NH3

B. NH4

C. N2H4

D. NO3

819. Which chemical compound is responsible for the green color of plants?

A. Chlorophyll

B. Hemoglobin

C. Carotene

D. Melanin

820. The mass number of an atom is equal to:

A. Number of protons + neutrons

B. Number of protons + electrons

C. Number of electrons only

D. Number of protons only

821. Which acid is found in the human stomach?

A. Sulfuric acid

B. Hydrochloric acid

C. Acetic acid

D. Nitric acid

822. The law that states mass cannot be created or destroyed in a chemical reaction is:

A. Boyle’s Law

B. Avogadro’s Law

C. Law of Conservation of Mass

D. Charles’ Law

823. Which of the following metals has the highest electrical conductivity?

A. Aluminum

B. Copper

C. Silver

D. Gold

824. The scientist who discovered the electron is:

A. J.J. Thomson

B. Ernest Rutherford

C. Niels Bohr

D. Isaac Newton

825. What is the chemical formula of sulfuric acid?

A. HCl

B. H2SO4

C. HNO3

D. H2CO3

826. The second most abundant element in Earth’s crust is:

A. Oxygen

B. Silicon

C. Aluminum

D. Iron

827. The process of heating an ore to extract a metal is called:

A. Electrolysis

B. Smelting

C. Refining

D. Alloying

828. What is the chemical symbol for potassium?

A. K

B. P

C. Pt

D. Po

829. The atomic number of aluminum is:

A. 12

B. 13

C. 14

D. 15

830. A compound that consists of only carbon and hydrogen is called a:

A. Hydroxide

B. Hydrocarbon

C. Carbohydrate

D. Halide

831. The most reactive group of nonmetals in the periodic table is:

A. Alkali metals

B. Halogens

C. Noble gases

D. Transition metals

832. Which of the following elements is NOT an alkali metal?

A. Sodium

B. Potassium

C. Magnesium

D. Lithium

833. The SI unit of amount of substance is:

A. Gram

B. Mole

C. Liter

D. Kilogram

834. A substance that contains only one type of atom is called:

A. Compound

B. Mixture

C. Element

D. Alloy

835. What is the common name for H2O2?

A. Water

B. Hydrogen peroxide

C. Hydroxide

D. Heavy water

836. The atomic number of oxygen is:

A. 6

B. 7

C. 8

D. 9

837. What do you call a solution that resists changes in pH?

A. Base

B. Buffer

C. Acid

D. Electrolyte

838. Which of the following metals is the best conductor of heat?

A. Iron

B. Copper

C. Silver

D. Aluminum

839. The process of separating a solid from a liquid by heating is called:

A. Filtration

B. Decantation

C. Evaporation

D. Condensation

840. Which of the following is an example of an exothermic reaction?

A. Ice melting

B. Boiling water

C. Combustion

D. Electrolysis of water

841. What type of chemical bond is formed when electrons are transferred between atoms?

A. Covalent

B. Ionic

C. Metallic

D. Hydrogen

842. Which noble gas has the highest atomic number?

A. Helium

B. Neon

C. Radon

D. Krypton

843. What is the molecular formula of glucose?

A. CH4

B. C6H12O6

C. H2O2

D. CO2

844. Which element is a key component of steel?

A. Aluminum

B. Copper

C. Iron

D. Silver

845. The measure of a fluid’s resistance to flow is called:

A. Density

B. Viscosity

C. Surface tension

D. Buoyancy

846. Which of the following is NOT a greenhouse gas?

A. Carbon dioxide

B. Methane

C. Oxygen

D. Nitrous oxide

847. What type of bond is present in NaCl?

A. Covalent

B. Ionic

C. Hydrogen

D. Metallic

848. Which process is used to produce pure water by heating and condensing it?

A. Filtration

B. Evaporation

C. Distillation

D. Sedimentation

849. The process of breaking down a compound into its elements using electricity is called:

A. Oxidation

B. Electrolysis

C. Neutralization

D. Sublimation

850. What is the chemical formula of calcium carbonate?

A. CaO

B. Ca(OH)2

C. CaCO3

D. CaCl2

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