Ionic Compounds Chemistry: Polyatomic Ions Quiz
This Polyatomic Ions Quiz is designed to test your knowledge of polyatomic ions, essential components in chemistry. Polyatomic ions are groups of atoms with an overall electrical charge, forming an integral part of numerous chemical compounds.
A polyatomic ion is seen as a molecule that has been ionized by gaining or losing electrons. In a polyatomic ion, the group of covalently bonded atoms carries a net charge because the total number of electrons in the molecule is not equal to the total number of protons in the molecule. This quiz offers an opportunity to enhance your knowledge and proficiency in Read morehandling polyatomic ions. Get ready to explore the world of chemical compounds and molecular formulas in this engaging and educational quiz on polyatomic ions!
Polyatomic Ions Questions and Answers
- 1.
What is the chemical name of NH4+?
- A.
Ammonium
- B.
Nitrite
- C.
Nitrate
- D.
Hydroxide
- E.
Acetate
Correct Answer
A. AmmoniumExplanation
NH4+ is known as the ammonium ion. In chemistry, it's a positively charged polyatomic ion (ion with more than one atom). It's formed by the protonation of ammonia (NH3). The other options in the list - Nitrite (NO2-), Nitrate (NO3-), Hydroxide (OH-), and Acetate (CH3COO-) are names of different ions and don't correspond to the given chemical formula, NH4+.Rate this question:
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- 2.
What is the chemical name of CrO42-?
- A.
Phosphate
- B.
Carbonate
- C.
Chromate
- D.
Sulfite
- E.
Sulfate
Correct Answer
C. ChromateExplanation
The chemical with the molecular formula CrO₄²⁻ is known as Chromate. This polyatomic ion consists of one chromium atom bonded to four oxygen atoms, and its negative charge indicates a net charge of -2. In chemical reactions, chromate ions play a role in various processes, contributing to the diversity of chemical compounds.Rate this question:
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- 3.
What is the chemical name of NO2?
Correct Answer
nitrogen dioxide, Nitrogen Dioxide, Nitrogen dioxideExplanation
Nitrogen Dioxide (NO2) is a chemical compound consisting of one nitrogen atom and two oxygen atoms. It is a significant pollutant produced by vehicles, industrial processes, and the combustion of fossil fuels. NO2 is known for its reddish-brown color and strong, acrid smell. It plays a crucial role in the formation of smog and acid rain, making it an important compound in environmental chemistry and air quality management.Rate this question:
- 4.
Acetate can be shown as C2H3O2- or CH3COO-.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Acetate can indeed be represented as C2H3O2- or CH3COO-. These are both valid chemical formulas for the acetate ion, which is a negatively charged ion. The formula C2H3O2- shows the molecular composition of acetate, with two carbon atoms, three hydrogen atoms, and two oxygen atoms. The formula CH3COO- represents the structural formula of acetate, showing the arrangement of atoms in the molecule. Both formulas are commonly used to represent acetate in chemical reactions and equations. Therefore, the statement is true.Rate this question:
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- 5.
What is the chemical name of CO32-?
- A.
Chromate
- B.
Phosphate
- C.
Nitrite
- D.
Carbonate
- E.
Sulfate
Correct Answer
D. CarbonateExplanation
The chemical formula CO₃²⁻ corresponds to the carbonate ion. Carbonate is a polyatomic ion composed of one carbon atom bonded to three oxygen atoms, carrying a charge of -2. It is a versatile ion found in various compounds, including common substances like calcium carbonate, which is a key component of limestone and chalk.Rate this question:
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- 6.
OH- can be described as which polyatomic ion?
- A.
Hydroxite
- B.
Phosphate
- C.
Hydroxide
- D.
Helium
- E.
Deoxyribose
Correct Answer
C. HydroxideExplanation
OH- is the chemical formula for the hydroxide ion. It consists of one oxygen atom bonded to one hydrogen atom and carries a negative charge. The hydroxide ion is commonly found in bases and plays a crucial role in many chemical reactions. Therefore, the correct description for OH- is hydroxide.Rate this question:
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- 7.
Is NO3- nitrite or nitrate?
Correct Answer
nitrate, NitrateExplanation
NO3- is the chemical formula for nitrate. Nitrate is an ion that consists of one nitrogen atom bonded to three oxygen atoms. It has a -1 charge, which is indicated by the negative sign. Nitrite, on the other hand, has the chemical formula NO2- and consists of one nitrogen atom bonded to two oxygen atoms. Therefore, the correct answer is nitrate, not nitrite.Rate this question:
- 8.
What elements are contained in the ion phosphate?
- A.
1 phosphorus, 4 oxygen, and a 3- charge
- B.
1 phosphorus, 4 oxygen, and a 2- charge
- C.
2 phosphorus, 4 oxygen, and a 3- charge
- D.
1 phosphorus, 5 oxygen, and a 2- charge
- E.
2 phosphorus, 4 oxygen, and a 3- charge
Correct Answer
A. 1 pHospHorus, 4 oxygen, and a 3- chargeExplanation
The ion phosphate (PO₄³⁻) contains 1 phosphorus atom and 4 oxygen atoms, each carrying a charge of 2⁻, resulting in a total charge of 3⁻ for the phosphate ion.
So, the correct representation is: 1 phosphorus, 4 oxygen, to the third power negative.Rate this question:
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- 9.
Does SO32- represent sulfate or sulfite?
- A.
Sulfite
- B.
Sulfate
- C.
Both
- D.
Neither
Correct Answer
A. SulfiteExplanation
The correct answer is sulfite. SO32- represents sulfite because it has a 2- charge, indicating that it has gained two electrons. Sulfite is a polyatomic ion composed of one sulfur atom and three oxygen atoms. It is commonly used as a preservative in food and beverages. Sulfate, on the other hand, is represented by SO42- and has a 2- charge. It is also a polyatomic ion but consists of four oxygen atoms bonded to a sulfur atom.Rate this question:
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- 10.
What is the chemical difference between sulfate and sulfite?
- A.
There is no difference, they are the same thing.
- B.
Sulfate has one more oxygen than sulfite.
- C.
Sulfate has a positive charge while sulfite has a negative charge.
- D.
Sulfite has one less sulfur than sulfate.
- E.
Sulfate goes to the third power, while sulfite goes to the second.
Correct Answer
B. Sulfate has one more oxygen than sulfite.Explanation
Sulfate and sulfite are both chemical compounds that contain sulfur and oxygen. The main difference between them is the number of oxygen atoms present. Sulfate has one more oxygen atom than sulfite. This difference in oxygen atoms affects their chemical properties and reactivity. Sulfate ions have a negative charge, while sulfite ions have a charge of -2. Therefore, the correct answer is that sulfate has one more oxygen than sulfite.Rate this question:
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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
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Current Version
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Sep 21, 2024Quiz Edited by
ProProfs Editorial Team
Expert Reviewed by
Zohra Sattar Waxali -
Sep 15, 2009Quiz Created by
Crifiris
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