Introduction to Chemistry: A Comprehensive Guide for BEng Students

Question 1

Which branch of chemistry focuses primarily on the study and synthesis of carbon-based compounds?

Accepted Answer

Organic chemistry

Answer

Physical chemistry

Answer

Inorganic chemistry

Answer

Analytical chemistry

Question 2

Which of the following is an example of a physical change?

Accepted Answer

Dissolution of sugar in water

Answer

Combustion of wood

Answer

Oxidation of iron

Answer

Neutralization of an acid by a base

Question 3

What is the chemical formula for water?

Accepted Answer

H2O

Answer

CH4

Answer

CO2

Answer

NH3

Question 4

What is the definition of chemical equilibrium?

Accepted Answer

A reversible reaction where the forward and reverse reactions occur at equal rates

Answer

A reaction that proceeds only in one direction

Answer

A reaction that produces more reactants than products

Answer

A reaction that is unaffected by external conditions

Question 5

Which SI unit is used to measure pressure?

Accepted Answer

Pascal

Answer

Atmospheres

Answer

Torr

Answer

Bar

Question 6

What is the approximate pH of a neutral solution?

Accepted Answer

7

Answer

0

Answer

14

Answer

10

Question 7

Which of the following substances is classified as a strong acid?

Accepted Answer

Hydrochloric acid

Answer

Acetic acid

Answer

Carbonic acid

Answer

Ammonia

Question 8

Calculate the molar mass of sodium chloride (NaCl).

Accepted Answer

58.5 g/mol

Answer

23 g/mol

Answer

35.5 g/mol

Answer

117 g/mol

Question 9

Which of the following is a property of matter and NOT a measurement?

Accepted Answer

Hardness

Answer

Mass

Answer

Volume

Answer

Density

Question 10

What type of change occurs when the composition of a substance remains the same but its physical form changes?

Accepted Answer

Physical change

Answer

Chemical change

Answer

Sublimation

Answer

Deposition

Question 11

Which of the following is a branch of chemistry that deals with the study of the interactions between electromagnetic radiation and matter?

Accepted Answer

Physical chemistry

Answer

Organic chemistry

Answer

Inorganic chemistry

Answer

Analytical chemistry

Question 12

What is the base unit of mass in the International System of Units (SI)?

Accepted Answer

Kilogram

Answer

Gram

Answer

Pound

Answer

Ounce

Question 13

Which state of matter has a definite shape and volume?

Accepted Answer

Solid

Answer

Liquid

Answer

Gas

Answer

Plasma

Question 14

What is the term for the smallest particle of an element that retains the chemical properties of that element?

Accepted Answer

Atom

Answer

Molecule

Answer

Ion

Answer

Compound

Question 15

Which of the following elements is classified as a metalloid?

Accepted Answer

Silicon

Answer

Carbon

Answer

Iron

Answer

Gold

Question 16

Identify the option that represents a chemical change.

Accepted Answer

Burning of wood

Answer

Melting of ice

Answer

Boiling of water

Answer

Dissolving of sugar in water

Question 17

Which option accurately defines Chemistry?

Accepted Answer

The study of matter and its properties

Answer

The study of living organisms

Answer

The study of the Earth and its atmosphere

Answer

The study of the universe

Question 18

What is the smallest indivisible unit of an element?

Accepted Answer

Atom

Answer

Molecule

Answer

Ion

Answer

Compound

Question 19

Identify the subatomic particle that carries a negative charge.

Accepted Answer

Electron

Answer

Proton

Answer

Neutron

Answer

Quark

Question 20

What is the chemical formula representing the compound formed between sodium and chlorine?

Accepted Answer

NaCl

Answer

Na2Cl

Answer

ClNa

Answer

Cl2Na

Question 21

Regarding the nature of matter, which statement is incorrect?

Accepted Answer

Matter can be infinitely divided without changing its properties.

Answer

Matter possesses mass and volume, making it tangible.

Answer

Matter undergoes transformations known as physical and chemical changes.

Answer

Matter consists of tiny particles, referred to as atoms.

Question 22

When ice melts at room temperature, what type of change occurs?

Accepted Answer

Physical change

Answer

Biochemical change

Answer

Nuclear change

Answer

Chemical change

Question 23

Which example best illustrates a chemical change?

Accepted Answer

Burning of wood

Answer

Dissolving salt in water

Answer

Boiling of water

Answer

Melting of ice

Question 24

Within an atom, what is the primary function of the nucleus?

Accepted Answer

Houses protons and neutrons, contributing to the atomic mass.

Answer

Dictates the chemical properties and reactivity of the atom.

Answer

Contains electrons, determining the electrical charge of the atom.

Answer

Accounts for most of the atom's volume and shape.

Question 25

Which element belongs to the group of noble gases?

Accepted Answer

Neon

Answer

Oxygen

Answer

Carbon

Question 26

The periodic table of elements is primarily organized according to which property?

Accepted Answer

Increasing atomic number

Answer

Increasing atomic mass

Answer

Increasing electronegativity

Question 27

Which element is classified as a metal?

Accepted Answer

Sodium

Answer

Oxygen

Answer

Sulfur

Answer

Chlorine