Genchem

A visually appealing illustration of atoms and molecules interacting, with colorful graphics representing various chemistry concepts like atomic structure, chemical reactions, and laboratory equipment.

Mastering General Chemistry

Test your knowledge of general chemistry concepts with our engaging quiz!

This quiz covers a wide range of fundamental topics including atomic theory, subatomic particles, and chemical reactions. Challenge yourself and see how well you understand the principles of chemistry!

Multiple Choice Questions
Covers key chemistry concepts
Perfect for students and enthusiasts

50 Questions12 MinutesCreated by ExperimentingAtom27

Which one is true about Bohrs atomic theory?

A. The atom contains a massive center known as nucleus.

B. The electrons are confined in specific regions in space.

C. The atom is solid and can no longer be reduced to smaller size.

D. The atom is like a bread with raisins sprinkled all over the surface.

Who proposed that the atom is chiefly empty space with a massive or solid center?

A. Rutherford

B. Thompson

C. Goldstein

D. Chadwick

Which one is most true about the subatomic particles of an atom?

A. There are atoms with no neutrons.

B. All atoms possess all subatomic particles

C. The nucleus is generally neutral, no charge.

D. In general, the number of protons and electrons determines the mass of atoms.

Which orbital has a principal quantum number of 3 and an azimuthal quantum number of 2?

A. 3s

B. 3d

C. 4f

D. 3f

How many electrons occupy the 2p orbitals in atoms where 2p orbitals are completely filled?

A. 2

B. 6

C.10

D. 12

What would happen if an atom releases a beta particle?

A. The atomic number will be decreased by 1

B. The mass of the atom will be increased by 1

C. The atomic number will be increased by 1

D. The mass of the atom will be decreased by 1

The region outside the nucleus where an electron can most probably be found is the___.

A. Electron cloud

B. S sublevel

C. Electron configuration

D. S quantum number

Which of the following electronic configurations is not possible or not correct?

A. 1s2 2s2 2p5

B. 1s2 2s2 2p6 3s2

C. 1s2 2s2 2p6 3s2 3p5

D. 1s2 2s2 2p2 3s2 3p1

Which set of quantum numbers is not a valid combination?

A. n = 1, l = 0, m = 0, s = +1

B. n = 2, l = 1, m = +1, s = +1❄2

C. n = 2, l = 0, m = +1, s = +1

D. n = 2, l = 0, m = 0, s = -1❄2

Hardness, temperature, color, size, and smoothness are all________.

A. States of matter.

B. Physical properties of matter.

C. Malleable and hard

D. Electrical and heat conductivity

Two extensive properties of iron would be?

A. Weight and shape

B. Length and ductility

C. Malleable and hard

D. Electrical and heat conductivity

Which one is an element?

A. A glass of mercury

B. A mixture of salt and pepper

C. Rain drops

D. Smoke from a car.

Matter made up of only ONE type of particle or atom?

A. Substance

B. Mixture

C. Solution

D. Heterogeneous mixture

Chlorine is more apt to exist as a negative ion than is sodium. This is because _____.

A. Chlorine is bigger than sodium

B. Chlorine has a greater ionization energy than sodium does

C. Chlorine has a greater electronegativity than sodium does

D. Chlorine is a gas and sodium is a solid

Which of the following would produce a solution?

A. Mixing alcohol and water

B. Mixing alcohol and cotton

C. Shaking a bottle of soft drink, “Coke”.

D. Shaking marbles in a bottle of smoke.

Which one would best refer to a substance?

A. It is a type of matter that can be separated to its components by mechanical means.

B. Matter that is composed of only one type of element.

C. A material that maybe made of an element or several elements that possess its own set of properties.

D. A homogenous material.

Which of the following involve the combination of several reactants to produce a few products?

A. synthesis

B. decomposition

C. Single replacement

D. Double replacement

All of the following are mixtures except_______.

A. 18K gold ring

B. Kalamansi juice

C. 70% isopropyl alcohol

D. Table sugar

Mixtures are divided into two classes. What are they?

A. Compounds and substances

B. Heterogeneous and compounds

C. Homogenous and heterogeneous

D. Homogenous and elements

. In a chemical reaction, mass is conserved. This means that the__________.

A. Mass of the products is always twice the mass of the reactants

B. Mass of the products stays the same during a chemical reaction

C. Mass of the reactants stays the same during a chemical reaction

D. Type and number of atoms in the reactants equals that of the atoms in the products

The chemical equation Fe + H2SO4 → FeSO4 + H2 is an example of______reaction.

A. synthesis

B. decomposition

C. Single replacement

D. Double replacement

The chemical equation 2 KClO3 → 2 KCl + 3 O2 is an example of__________ reaction.

A. synthesis

B. decomposition

C. Single replacement

D. Double replacement

In a chemical reaction__________.

A. New atoms are formed which combine to make the products

B. Some atoms disappear while others multiply to form the products

C. The atoms of the reactants always stay together to form the products

D. The atoms of the reactants unbond, rearrange, and then rebond to form the products

Chemical equations must be balanced to satisfy the _____.

A. Law of definite proportions

B. Law of multiple proportions

C. Law of conservation of mass

D. Principle of Avogadro

When the following equation is balanced, what is the coefficient for HCl? Mg(s) + HCl(aq) → MgCl2 (aq) + H2(g)

A. 1

B. 2

C. 3

D. 4

What are the missing coefficients for the skeleton equation below? __N2 + __H2 → __NH3

A. 1,1,2

B. 1,3,3

C. 3,1,2

D. 1,3,2

What are the missing coefficients for the skeleton equation below? __Al2 (SO4)3(aq) + __KOH(aq) → __Al(OH)3(aq) + __K2SO4(aq)

A. 1,3,2,3

B. 2,12,4,6

C. 4,6,2,3

D. 1,6,2,3

Atomic radius generally increases as we move __________.

A. Down a group and from right to left across a period

B. Up a group and from left to right across a period

C. Down a group and from left to right across a period

D. Up a group and from right to left across a period

Which of the following correctly lists the five atoms in order of increasing size (smallest to largest)?

A. F < K < Ge < Br < Rb

B. F < Ge < Br < K < Rb

C. F < K < Br < Ge < Rb

D. F < Br < Ge < K < Rb

. Electronegativity ____ from left to right within a period and ____ from top to bottom within a group.

A. decreases, increases

B. increases, increases

C. increases, decreases

D. Stays the same, increases

The list that correctly indicates the order of metallic character is __________.

A. B > N > C

B. F > Cl > S

C. Si > P > S

D. P > S > Se

Which of the following set of elements is written in order of their increasing metallic character?

A. Na Li K

B. C Q N

C. Mg Al Si

D. Be Mg Ca

An element has 12 protons. The group and period to which this element belongs to is

A. 2nd group, 3rd period

B. 2nd group, 2nd period

C. 3rd group, 2nd period

D. 3rd group, 3rd period

What was Dmitri Mendeleev's greatest contribution to the history of the periodic table?

A. He arranged all of the known elements by their atomic number

B. He realised that there was a pattern of reactivity repeated every 8 elements

C. He predicted the existence (and properties) of new elements

D. He identified the "law of triads" which became the groups

Which of the following is correct order of atomic size ?

A. Cl < F < Br < I

B. F < Cl < Br < I

C. I < Br < Cl < F

D. Br < I < Cl < F

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