MCQ in General Chemistry Part 19 | ECE Board Exam

This is the Multiple Choice Questions Part 19 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 19 of the Series

⇐ MCQ in General Chemistry Part 18 | ECE Board Exam

Choose the letter of the best answer in each question.

901. What is the most common element in the universe?

A. Oxygen

B. Hydrogen

C. Carbon

D. Helium

902. Which metal is liquid at room temperature?

A. Gold

B. Mercury

C. Aluminum

D. Silver

903. What is the term for the amount of space a substance occupies?

A. Density

B. Volume

C. Mass

D. Weight

904. Which gas is used in fire extinguishers?

A. Oxygen

B. Carbon dioxide

C. Helium

D. Nitrogen

905. What is the chemical formula for glucose?

A. C₆H₁₂O₆

B. H₂O

C. CO₂

D. CH₄

906. What type of solution has a pH greater than 7?

A. Acidic

B. Basic

C. Neutral

D. Saturated

907. Which process describes a liquid turning into a solid?

A. Condensation

B. Freezing

C. Evaporation

D. Sublimation

908. What is the atomic symbol for tin?

A. Tn

B. Ti

C. Sn

D. Pb

909. What is the main element in organic chemistry?

A. Hydrogen

B. Carbon

C. Oxygen

D. Nitrogen

910. What is the SI unit for pressure?

A. Joule

B. Pascal

C. Newton

D. Watt

911. What is the process of solid turning directly into gas?

A. Evaporation

B. Condensation

C. Sublimation

D. Freezing

912. Which group in the periodic table contains noble gases?

A. Group I

B. Group IV

C. Group VII

D. Group VIII

913. What is the main component of sand?

A. Sodium chloride

B. Calcium carbonate

C. Silicon dioxide

D. Magnesium oxide

914. What is the chemical name of table sugar?

A. Sucrose

B. Glucose

C. Fructose

D. Lactose

915. Which gas is used in neon lights?

A. Argon

B. Neon

C. Krypton

D. Xenon

916. What is the primary metal in brass?

A. Copper

B. Aluminum

C. Iron

D. Silver

917. Which metal is the best conductor of electricity?

A. Copper

B. Silver

C. Gold

D. Aluminum

918. What is the lightest noble gas?

A. Neon

B. Argon

C. Krypton

D. Helium

919. Which metal is commonly used in thermometers?

A. Mercury

B. Lead

C. Iron

D. Aluminum

920. What is the chemical formula for sulfur dioxide?

A. SO₂

B. CO₂

C. NO₂

D. H₂S

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

A. Oxygen

B. Nitrogen

C. Carbon dioxide

D. Hydrogen

922. What is the name of the process by which plants make their own food?

A. Respiration

B. Fermentation

C. Photosynthesis

D. Digestion

923. Which element is commonly used in batteries?

A. Lead

B. Zinc

C. Lithium

D. Copper

924. Which gas is responsible for the greenhouse effect?

A. Nitrogen

B. Carbon dioxide

C. Oxygen

D. Helium

925. What is the chemical formula for calcium carbonate, a common component of limestone?

A. CaO

B. CaCl₂

C. CaCO₃

D. Ca(OH)₂

926. What is the name of the positively charged subatomic particle?

A. Electron

B. Neutron

C. Proton

D. Atom

927. Which element has the highest electrical conductivity?

A. Copper

B. Silver

C. Gold

D. Aluminum

928. What is the SI unit of energy?

A. Watt

B. Newton

C. Joule

D. Pascal

929. Which type of radiation has the highest energy?

A. Alpha

B. Beta

C. Gamma

D. Infrared

930. Which of the following is a noble gas?

A. Hydrogen

B. Helium

C. Oxygen

D. Nitrogen

931. What is the main element in steel?

A. Aluminum

B. Iron

C. Copper

D. Tin

932. Which of these is a property of acids?

A. They turn litmus paper blue

B. They have a bitter taste

C. They react with metals to produce hydrogen gas

D. They feel slippery

933. Which law states that mass cannot be created or destroyed in a chemical reaction?

A. Boyle’s Law

B. Law of Conservation of Mass

C. Dalton’s Law

D. Charles’ Law

934. What is the most common isotope of hydrogen?

A. Protium

B. Deuterium

C. Tritium

D. Helium

935. Which type of chemical bond involves the transfer of electrons?

A. Covalent

B. Ionic

C. Metallic

D. Hydrogen

936. What do you call a reaction where energy is absorbed?

A. Exothermic

B. Endothermic

C. Combustion

D. Redox

937. What is the most electronegative element?

A. Oxygen

B. Fluorine

C. Chlorine

D. Nitrogen

938. Which gas is known as “marsh gas”?

A. Oxygen

B. Carbon dioxide

C. Methane

D. Nitrogen

939. What is the chemical symbol for tungsten?

A. Tu

B. Tn

C. W

D. Ta

940. What is the pH of pure water?

A. 5

B. 7

C. 9

D. 11

941. Which gas is used in respiration?

A. Carbon dioxide

B. Oxygen

C. Nitrogen

D. Argon

942. What is the name of the process where a liquid changes to gas at a temperature below its boiling point?

A. Evaporation

B. Condensation

C. Freezing

D. Deposition

943. What is the molar mass of water (H₂O)?

A. 16 g/mol

B. 18 g/mol

C. 20 g/mol

D. 22 g/mol

944. What is the oxidation state of hydrogen in water?

A. 0

B. -1

C. +1

D. +2

945. What is the main component of natural gas?

A. Carbon dioxide

B. Methane

C. Propane

D. Butane

946. Which of the following is a heterogeneous mixture?

A. Saltwater

B. Air

C. Sand and water

D. Vinegar

947. What is the SI unit for temperature?

A. Celsius

B. Fahrenheit

C. Kelvin

D. Joule

948. What is the formula for sulfuric acid?

A. HCl

B. H₂SO₄

C. HNO₃

D. H₃PO₄

949. Which of the following metals is the least reactive?

A. Sodium

B. Calcium

C. Gold

D. Aluminum

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

A. Oxidation

B. Decomposition

C. Neutralization

D. Precipitation

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