In the periodic table, which group contains elements that are highly reactive and tend to form salts with metals?

Group II (Alkaline earth metals)

A sample contains 22 g of carbon dioxide. This is equal to

One molar volume of carbon dioxide

Chemistry Trivia: Atoms And Molecules Quiz

Reviewed by Zohra Sattar Waxali

Zohra Sattar Waxali, PhD (Chemistry) |

Chemistry

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Dr. Zohra Sattar Waxali earned her doctorate in chemistry and biochemistry from Northwestern University, specializing in the metallomes of cardiac cells and stem cells, and their impact on biological function. Her research encompasses the development of arsenoplatin chemotherapeutics, stapled peptide estrogen receptor inhibitors, and antimicrobial natural products.

, PhD (Chemistry)

By Tanmay Shankar

Tanmay Shankar

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1/15 Questions

Which of the following correctly represents 360g of water?a) 2 moles of waterb) 20 moles of waterc) 6.022 x 10²³ molecules of waterd) 1.2044 x 10²⁵ molecules of water
- A)
- A) and d)
- B) and c)
- B) and d)

About This Quiz

Get ready to explore the fundamental concepts of atoms and molecules with our comprehensive quiz! This interactive challenge is designed to enhance your understanding of the building blocks of chemistry, from the structure of atoms to the complexities of molecular bonding.
Perfect for students preparing for exams, chemistry enthusiasts, or anyone curious about the microscopic world of atoms and See moremolecules, this quiz covers a range of topics that will test your knowledge and sharpen your skills.
Each question is carefully crafted to reinforce your understanding of these core concepts. Whether you're exploring the periodic table or deciphering molecular formulas, this quiz is your gateway to mastering chemistry basics. Dive in and see how well you can score!

Chemistry Trivia: Atoms And Molecules Quiz - Quiz

2.

Which of the following is NOT a subatomic particle found in an atom?
- Proton
- Neutron
- Electron
- Photon
Correct Answer

A. Photon

Explanation

Photons are elementary particles of light and electromagnetic radiation, not subatomic particles found within atoms. Protons, neutrons, and electrons are the fundamental building blocks of atoms, with protons and neutrons residing in the nucleus and electrons orbiting the nucleus.

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0
3.

Which of the following types of chemical bonds involves the sharing of electron pairs between atoms?
- Ionic bond
- Hydrogen bond
- Covalent bond
- Metallic bond
Correct Answer

A. Covalent bond

Explanation

A covalent bond is a type of chemical bond that involves the sharing of electron pairs between atoms. These pairs of electrons are known as shared pairs or bonding pairs, and they create a stable balance of attractive and repulsive forces between atoms. Ionic bonds, on the other hand, involve the transfer of electrons between atoms, resulting in charged ions. Hydrogen bonds are weak attractions between a hydrogen atom in one molecule and an electronegative atom in another. Metallic bonds involve the sharing of free electrons among a lattice of metal atoms.

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4.

Which molecular shape best describes a molecule with four bonded pairs and no lone pairs on the central atom?
- Linear
- Trigonal planar
- Bent
- Tetrahedral
Correct Answer

A. Tetrahedral

Explanation

A molecule with four bonded pairs and no lone pairs on the central atom forms a tetrahedral shape. This is because the four pairs of electrons around the central atom repel each other equally, resulting in a tetrahedral geometry with bond angles of 109.5°. Linear molecules have two bonded pairs with no lone pairs. Trigonal planar shapes occur with three bonded pairs and no lone pairs. Bent shapes involve lone pairs, causing the bonded atoms to deviate from a straight line.

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5.

All samples of carbon dioxide contain carbon and oxygen in the mass ratio of 3:8. This is in agreement with the Law of ___________.
- Conservation of Mass
- Constant Proportion
- Multiple Proportion
- Reciprocal Proportion
Correct Answer

A. Constant Proportion

Explanation

The given statement suggests that all samples of carbon dioxide have a consistent mass ratio of carbon to oxygen, which is 3:8. This is in agreement with the Law of Constant Proportion, which states that a given compound always contains the same elements in the same proportions by mass. This law is a fundamental principle in chemistry and helps to explain the consistent composition of compounds.

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6.

In the periodic table, which group contains elements that are highly reactive and tend to form salts with metals?
- Group I (Alkali metals)
- Group II (Alkaline earth metals)
- Group VIIA (Halogens)
- Group VIII (Noble gases)
Correct Answer

A. Group VIIA (Halogens)

Explanation

Group VIIA, known as the halogens, includes fluorine, chlorine, bromine, iodine, and astatine. These elements are highly reactive and often combine with metals to form salts. For example, sodium chloride (table salt) is a combination of sodium (a metal) and chlorine (a halogen). Alkali metals (Group I) and alkaline earth metals (Group II) are also reactive but do not form salts with other metals. Noble gases (Group VIII) are largely unreactive due to their stable electron configurations.

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7.

Avogadro's number represents the number of atoms in ________.
- 12 grams of 12C
- 320 grams of sulphur
- 32 grams of oxygen
- 1 gram of 12C
Correct Answer

A. 12 grams of 12C

Explanation

Avogadro's number represents the number of atoms in 12 grams of 12C. This is because the atomic mass of carbon is 12 atomic mass units (AMU), and Avogadro's number is defined as the number of atoms in 12 grams of carbon-12. Therefore, the answer is 12 grams of 12C.

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8.

A sample contains 22 g of carbon dioxide. This is equal to
- One molar volume of carbon dioxide
- One mole of carbon dioxide
- Half mole of carbon dioxide
- Two moles of carbon dioxide
Correct Answer

A. Half mole of carbon dioxide

Explanation

The molar mass of carbon dioxide (CO2) is approximately 44 g/mol. Therefore, 22 g of carbon dioxide is equal to half a mole (0.5 mol) of carbon dioxide.

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9.

Select the ionic compound from the following
- Sulphur molecule,
- Phosphorous molecule,
- Methane,
- Copper nitrate,
Correct Answer

A. Copper nitrate,

Explanation

Copper nitrate is the correct answer because it is an ionic compound. Ionic compounds are formed when a metal and non-metal combine through an electrostatic attraction between positively and negatively charged ions. In the case of copper nitrate, copper is a metal and nitrate is a polyatomic ion consisting of nitrogen and oxygen. Therefore, copper nitrate is an ionic compound.

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1
10.

Chose the option which does not change when a chemical reaction takes place
- Volume
- Mass
- Physical properties
- Chemical properties
Correct Answer

A. Mass

Explanation

Mass is a measure of the amount of matter in an object and is a fundamental property that remains constant during a chemical reaction. In a chemical reaction, the atoms of the reactants rearrange to form new products, but the total mass of the reactants is always equal to the total mass of the products. This is known as the law of conservation of mass. Therefore, mass does not change when a chemical reaction takes place.

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11.

Select the option which does not represent molar mass of a substance?
- 1 mole of HCl
- 6.022 x molecules of helium
- 16 gm of
- 44 gm of
Correct Answer

A. 16 gm of

Explanation

Option B, "6.022 × 10²³ molecules of helium," does not directly represent the molar mass of a substance. While this number (Avogadro's number) signifies the number of particles in one mole, it does not specify the molar mass itself. In contrast, options A, C, and D all directly represent the molar mass of their respective substances: HCl (36.5 g/mol), CH₄ (16 g/mol), and CO₂ (44 g/mol). Therefore, Option B does not represent the molar mass of a substance.

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12.

Which term describes a molecule consisting of two or more atoms held together by chemical bonds?
- Element
- Isotope
- Ion
- Molecule
Correct Answer

A. Molecule

Explanation

A molecule is a group of two or more atoms held together by chemical bonds. These atoms can be the same (as in O₂ or H₂) or different (as in H₂O or CO₂). An element refers to a pure substance composed of only one type of atom. Isotopes are variants of a particular chemical element that differ in neutron number. An ion is an atom or molecule that has gained or lost one or more electrons, thus acquiring an electrical charge.

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13.

Which of the following substances has the highest molar mass?
- NH₃
- H₂O
- CO₂
- CH₄
Correct Answer

A. CO₂

Explanation

Among the given substances, NH₃ (ammonia) has a molar mass of about 17 g/mol, H₂O (water) is approximately 18 g/mol, CO₂ (carbon dioxide) is around 44 g/mol, and CH₄ (methane) is roughly 16 g/mol. CO₂ has the highest molar mass among these substances at 44 g/mol.

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14.

The chemical symbol for nitrogen gas is
- Ni
- N+
- N
Correct Answer

A.

Explanation

The correct answer is N. Nitrogen gas is represented by the chemical symbol N. The symbol Ni represents the element nickel, while N+ is not a valid chemical symbol.

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15.

Which one of the following would weigh the highest?
- 0.2 mole of sucrose( )
- 2 moles of
- 2 moles of
- 10 moles of
Correct Answer

A. 2 moles of

Explanation

Multiplying the molar mass by the number of moles of each compound will calculate the mass of each sample. 2 moles of calcium carbonate weigh the most. Calcium carbonate’s molar mass is 100 g/mol, so 2 moles of calcium carbonate weigh 200 g.

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Zohra Sattar Waxali |PhD (Chemistry) |

Chemistry

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Chemistry Trivia: Atoms And Molecules Quiz

Which of the following correctly represents 360g of water?a) 2 moles of waterb) 20 moles of waterc) 6.022 x 1023 molecules of waterd) 1.2044 x 1025 molecules of water

Quiz Preview

Which of the following is NOT a subatomic particle found in an atom?

Which of the following types of chemical bonds involves the sharing of electron pairs between atoms?

Which molecular shape best describes a molecule with four bonded pairs and no lone pairs on the central atom?

All samples of carbon dioxide contain carbon and oxygen in the mass ratio of 3:8. This is in agreement with the Law of ___________.

In the periodic table, which group contains elements that are highly reactive and tend to form salts with metals?

Avogadro's number represents the number of atoms in ________.​

A sample contains 22 g of carbon dioxide. This is equal to​

Select the ionic compound from the following

Chose the option which does not change when a chemical reaction takes place

Select the option which does not represent molar mass of a substance?

Which term describes a molecule consisting of two or more atoms held together by chemical bonds?

Which of the following substances has the highest molar mass?

The chemical symbol for nitrogen gas is​

Which one of the following would weigh the highest?

Which of the following correctly represents 360g of water?a) 2 moles of waterb) 20 moles of waterc) 6.022 x 10²³ molecules of waterd) 1.2044 x 10²⁵ molecules of water

Avogadro's number represents the number of atoms in ________.

A sample contains 22 g of carbon dioxide. This is equal to

The chemical symbol for nitrogen gas is