9th Grade Science: Chemical Bonding Quiz

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Questions and Answers

What is the role of zinc in a voltaic cell?

It serves as the cathode.

It balances the overall charge.

It serves as the anode. (correct)

It serves as the site of reduction.

Which of the following compounds is classified as ionic?

Borane (BH3)

Water (H2O)

Sodium chloride (NaCl) (correct)

Hydrogen gas (H2)

What is formed during the reaction of sodium chloride?

An ionic compound. (correct)

A metallic bond.

A molecular compound.

A covalent compound.

Which type of bond exists in water (H2O)?

Covalent bond Signup and view all the answers

What does a voltmeter measure in a voltaic cell?

Potential difference Signup and view all the answers

What leads to the formation of covalent compounds?

The sharing of valence electrons. Signup and view all the answers

Which of the following is a characteristic property of ionic compounds?

They conduct electricity when dissolved in water. Signup and view all the answers

Which of these compounds is formed by sharing electrons?

Sulfur dioxide (SO2) Signup and view all the answers

What characteristic primarily differentiates ionic compounds from covalent compounds?

Ionic compounds result from the transfer of electrons. Signup and view all the answers

Which physical state is typically associated with ionic compounds at room temperature?

Crystalline solid Signup and view all the answers

What is a typical property of covalent compounds concerning their melting points?

They usually have low melting points. Signup and view all the answers

What defines the electrical conductivity of ionic compounds in solution (aqueous state)?

They conduct electricity. Signup and view all the answers

Which of the following is true concerning the flammability of ionic compounds?

They are mostly nonflammable. Signup and view all the answers

What is the solubility behavior of ionic compounds in water?

They generally have high solubility. Signup and view all the answers

How does the texture of ionic compounds generally compare to that of covalent compounds?

Ionic compounds are hard and brittle. Signup and view all the answers

Which property is typically lower in ionic compounds compared to covalent compounds?

Melting point Signup and view all the answers

What primarily determines the polarity of compounds?

The difference of elements involved Signup and view all the answers

Compounds that involve metal and nonmetal with an electronegativity difference greater than what value will form an ionic compound?

1.9 Signup and view all the answers

Compounds with an electronegativity difference between 0.5 and 1.9 typically result in what type of covalent bond?

Polar covalent Signup and view all the answers

What characteristic is generally true for ionic compounds compared to covalent compounds?

Higher melting and boiling points Signup and view all the answers

Which type of compounds are known to be harder and more brittle?

Ionic compounds Signup and view all the answers

In a solution, which type of compounds can conduct electricity?

Ionic compounds Signup and view all the answers

Which substances tend to be more flammable?

Covalent compounds Signup and view all the answers

Which of the following is a characteristic of covalent compounds in solid form?

Poor conductors of electricity Signup and view all the answers

Which of the following compounds is NOT ionic?

C10H8 Signup and view all the answers

In a voltaic cell, which statement correctly describes the electrodes?

One electrode is positive and one is negative. Signup and view all the answers

What is true about the reactions occurring in a voltaic cell?

The reactions produce electric current. Signup and view all the answers

Which of the following pairings correctly identifies the roles of the electrodes in a voltaic cell?

Anode – oxidation: cathode – reduction Signup and view all the answers

Which compound is considered an electrolyte used to replenish ions in the body?

Calcium Signup and view all the answers

Which of the following correctly identifies the relationship between anode and cathode?

Electrons flow from the anode to the cathode. Signup and view all the answers

Which property distinguishes between ionic and covalent compounds?

Electrical conductivity in aqueous solution Signup and view all the answers

Which statement is TRUE regarding ionic and covalent compounds?

Ionic compounds often dissolve well in water. Signup and view all the answers

What kind of substance is represented by the structure if it forms by sharing electrons?

Covalent compound Signup and view all the answers

Which properties are characteristic of covalent compounds?

They are soft and flexible. Signup and view all the answers

What is the nature of the substances with high melting points and crystalline structure?

Ionic compounds with high melting points Signup and view all the answers

Why do covalent compounds generally not conduct electricity when dissolved in water?

Covalent compounds dissolve into molecules. Signup and view all the answers

Which of the following substances does NOT conduct electricity?

Salt granules Signup and view all the answers

Which type of matter can exist in solid, liquid, and gas forms at normal conditions?

Gasoline Signup and view all the answers

Which elements will most likely form a nonpolar covalent compound?

Oxygen and Oxygen Signup and view all the answers

Which of the following statements about covalent compounds is incorrect?

They have high melting points. Signup and view all the answers

What process leads to the formation of water?

Interaction of two hydrogen atoms with one oxygen atom Signup and view all the answers

Which characteristic is true about ionic compounds?

Conduct electricity when dissolved in water Signup and view all the answers

Why are covalent compounds generally insoluble in water?

They are nonpolar and do not dissolve in polar solvents Signup and view all the answers

Which of the following compounds is identified as covalent?

Monosodium Glutamate Signup and view all the answers

What is the primary reason ionic compounds have high melting points?

Strong attraction between oppositely charged ions Signup and view all the answers

Which characteristic is not typical of covalent compounds?

High boiling point Signup and view all the answers

How can you determine if a compound is ionic?

By the transfer of electrons between metals and non-metals Signup and view all the answers

Which statement is false regarding the properties of sugars?

Sugar conducts electricity when in solid form Signup and view all the answers

Study Notes

Module Title

Science Quarter 2-Matter, Module 2: Chemical Bonding: Properties of Compounds

Module Information

Grade level 9
First Edition, 2020
Published by the Department of Education

Development Team

Merry Chris T. Tabligan, Writer
Loreta E. Santos, Editor
Various reviewers, editors, language specialists, designers, and layout artists
Various management team members

Learning Competency

Recognize different types of compounds (ionic or covalent) based on their properties such as melting point, hardness, polarity, and electrical and thermal conductivity. (S9MT-IIb-14)
After studying this module, students will be able to :
- identify and describe ionic and covalent compounds based on their chemical formula and chemical names
- list and explain the different physical properties of ionic and covalent compounds
- distinguish ionic from covalent compounds based on their physical properties
- give examples of natural phenomena utilizing the unique physical properties of ionic and covalent compounds

Introductory Message

The Self-Learning Module (SLM) is a tool for students to continue their learning at home.
Pre-tests and post-tests are included in each module to assess prior and current knowledge
Notes to the teacher are provided for facilitators and parents.
Do not write in this module unless it is for answering the tasks. Use a separate sheet of paper to answer the tests and exercises. Always read instructions carefully.

What I Need to Know

This module is organized to assist students with the learning competency of recognizing various chemical compounds (ionic or covalent).
The arrangement of lessons follows the standard sequence of the course but can be changed according to your textbook
The module focuses on the competency of identifying various chemical compounds.

Other Information

Specific activities and questions on various concepts about chemical compounds are included in the module, to help students achieve the learning competency.
Understanding the composition differences helps explain the different properties in the various compounds.

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Description

Test your understanding of chemical bonding concepts in 9th grade science. This quiz focuses on identifying and describing ionic and covalent compounds based on their properties. Gain insights into their physical characteristics, such as melting point and conductivity, while recognizing the differences between these two types of compounds.