114 Questions
What is the primary product of fermentation?
Ethanol
What is the reactant in the fermentation reaction example?
Glucose
What is a common indicator of a chemical reaction?
A change in color
What is the product of the ammonium dichromate volcano reaction?
All of the above
What is a field of science that involves the use of chemistry?
Environmental science
What is a common task of chemists?
Discovering new compounds
What was Marie Curie known for?
Her research on radioactivity
What is a unique achievement of Marie Curie?
She was the first woman to win a Nobel Prize
What is the gas produced in the reaction between baking soda and vinegar?
Carbon dioxide
What is the purpose of the vinegar in the eggshell removal activity?
To dissolve the eggshell
What happens to particles during a chemical reaction?
They break their bonds and form new bonds
What is a reactant in a chemical reaction?
A substance that takes part in and undergoes change during a chemical reaction
What is the product of the reaction between carbon and oxygen?
Carbon dioxide
What is the chemical equation for the reaction between carbon and oxygen?
C + O2 → CO2
What is the result of a chemical reaction?
The formation of new compounds
What is fermentation?
A metabolic process that produces chemical changes
What is the definition of a compound?
A substance made up of two or more different elements
What is the product of the reaction between hydrogen and oxygen?
Water
What occurs during a chemical reaction?
Breaking and forming chemical bonds
What is a reaction flask or reaction vessel?
A container used to carry out a chemical reaction
What is an indication of a chemical reaction?
The formation of gas
What is a precipitate?
A solid material formed during a reaction
What sense can help us identify chemical reactions?
Sight, smell, heat, and sound
What type of reaction releases heat?
Exothermic reaction
What is an example of a chemical reaction that produces a distinct smell?
Formation of hydrogen sulfide gas
What do bubbles in the reaction flask indicate?
Formation of gas
What occurs when the acetic acid in vinegar reacts with the calcium carbonate in the eggshell?
The eggshell dissolves, releasing carbon dioxide gas and forming calcium acetate
Which of the following best describes what happens to the bonds in a chemical reaction?
Old bonds are broken, and new bonds are formed
What is the purpose of coefficients in a chemical equation?
To indicate the number of units of each substance involved in the reaction
What is the term for the substance formed as a result of a chemical reaction?
Product
What is an example of a compound?
Water (H2O)
Which of the following chemical reactions releases heat?
Reaction between carbon and oxygen
What is the term for a symbolic representation of a chemical reaction?
Chemical Equation
What is the result of the reaction between hydrogen gas and oxygen gas?
Water and heat
What is the term for the process of breaking bonds in the reactants and forming new bonds in the products?
Rearrangement of Atoms
What is the term for a substance that takes part in and undergoes change during a chemical reaction?
Reactant
What is the primary transformation that occurs during a chemical reaction?
Breaking and forming chemical bonds
Which of the following is NOT a sign of a chemical reaction?
Boiling of the reactants
What is the term for the solid material that forms in a reaction flask during a chemical reaction?
Precipitate
Which sense can help us identify chemical reactions through a distinct smell?
Smell
What is the term for a container used to carry out a chemical reaction?
Reaction vessel
What type of reaction involves the release of heat?
Exothermic reaction
What is the result of a chemical reaction in terms of the chemical composition of the reactants?
The reactants are transformed into new substances
What is a common error to avoid when identifying gas formation in a reaction flask?
Confusing it with boiling
What is the primary purpose of fermentation in food production?
To preserve food and create new products
What is the role of yeast in the fermentation reaction?
To convert sugars into alcohol and carbon dioxide
What is a common characteristic of chemical reactions?
They can produce unique and noticeable changes
What is the profession of individuals who discover new compounds and develop new materials?
Chemists
What is the significance of Marie Curie's research?
She was a pioneer in the study of radioactivity
What is the equation for the fermentation reaction?
C_6H_{12}O_6 → 2C_2H_5OH + 2CO_2
What is the product of the ammonium dichromate volcano reaction?
Nitrogen gas, water, and dark green chromium oxide
What is the significance of the ammonium dichromate volcano reaction?
It is a demonstration of a chemical reaction
What is the primary indicator of a chemical reaction in the reaction flask?
A change in colour
What is the term for the solid material that forms in a reaction flask during a chemical reaction?
A precipitate
What is the purpose of using our senses to identify chemical reactions?
To detect changes in the properties of the substances involved
What is the term for a container used to carry out a chemical reaction?
A reaction flask or reaction vessel
What is the result of a chemical reaction in terms of the chemical composition of the reactants?
A change in chemical composition
What is an example of a chemical reaction that involves the formation of a gas?
The reaction between baking soda and vinegar
What is the term for a process in which substances are transformed into new substances with different chemical properties?
A chemical reaction
What is an example of a chemical reaction that produces a distinct smell?
The reaction that produces hydrogen sulfide gas
What is the primary role of microorganisms like yeast in fermentation?
To convert sugars into alcohol and carbon dioxide
What is a common indicator of a chemical reaction, as observed in the ammonium dichromate volcano reaction?
A change in color and the production of gas
What is the significance of Marie Curie's research in the field of chemistry?
She was a pioneer in the study of radioactivity
What is the primary application of fermentation in food production?
To preserve food and produce fermented foods and beverages
What is the result of the chemical reaction between glucose and yeast in fermentation?
The production of ethanol and carbon dioxide
What is the primary role of chemists in their field of work?
To discover new compounds and develop new materials
What is a common application of chemistry in different fields?
In various fields, including medicine, environmental science, and materials science
What is the result of the reaction between the acetic acid in vinegar and the calcium carbonate in the eggshell?
The production of carbon dioxide gas and water
What is the chemical equation for the fermentation reaction?
C6H12O6 → 2C2H5OH + 2CO2
What is the role of coefficients in a chemical equation?
To indicate the number of units of each substance involved in the reaction
What is the outcome of a chemical reaction in terms of the chemical composition of the reactants?
The reactants are transformed into products with different properties
What is the process of breaking bonds in the reactants and forming new bonds in the products?
Rearrangement of atoms
What is the term for the substance that takes part in and undergoes change during a chemical reaction?
Reactant
What is the purpose of the eggshell removal activity?
To remove the shell of a raw egg without breaking it
What is the term for the symbolic representation of a chemical reaction?
Chemical equation
What occurs during a chemical reaction in terms of the bonds between atoms?
The bonds between atoms are broken and new bonds are formed
What is the result of the reaction between hydrogen gas and oxygen gas?
The production of water
What is the primary transformation that occurs during a chemical reaction?
The rearrangement of atoms to form new compounds
What is the primary difference between a chemical reaction and boiling?
The formation of gas bubbles
Which of the following senses is NOT typically used to identify a chemical reaction?
Taste
What is the term for the process of breaking and forming chemical bonds during a chemical reaction?
Chemical transformation
What is the primary purpose of a reaction flask or reaction vessel?
To contain and carry out a chemical reaction
Which of the following is an example of a chemical reaction that produces a solid?
The reaction between calcium carbonate and acetic acid
What is the term for the substances that undergo a transformation during a chemical reaction?
Reactants
Which of the following is a common indicator of an exothermic reaction?
The release of heat
What is the term for the new substances formed during a chemical reaction?
Products
What is the primary mechanism by which the acetic acid in vinegar reacts with the calcium carbonate in the eggshell?
Acid-base reaction
What is the role of coefficients in a chemical equation?
To indicate the number of units of each substance involved
What is the significance of the reaction between hydrogen gas and oxygen gas?
It produces water, which is essential for life
What is the primary characteristic of a chemical reaction?
It involves the rearrangement of atoms
What is the term for the process of breaking bonds in the reactants and forming new bonds in the products?
Chemical transformation
What is the primary purpose of a chemical equation?
To represent the reactants and products in a chemical reaction
What is the term for a substance that is formed as a result of a chemical reaction?
Product
What is the primary difference between a reactant and a product?
A reactant is a substance that is consumed, while a product is a substance that is formed
What is the term for the container used to carry out a chemical reaction?
Reaction vessel
What is the primary characteristic of a combustion reaction?
It involves the release of heat
What is the primary purpose of the fermentation reaction in the production of ethanol?
To convert sugars into a molecule that can be used as a fuel
Which of the following is a characteristic of chemical reactions that can be observed?
All of the above
What is the primary role of microorganisms such as yeast in the fermentation reaction?
To convert glucose into ethanol and carbon dioxide
Which of the following careers involves the use of chemistry to develop new materials?
Materials scientist
What is the chemical equation for the reaction between ammonium dichromate and oxygen?
(NH_4)_2Cr_2O_7 → N_2 + 4H_2O + Cr_2O_3
What is the primary application of chemistry in the field of medicine?
Developing new medical treatments
Which of the following is a characteristic of the reaction between ammonium dichromate and oxygen?
It produces bright orange sparks
What is the significance of Marie Curie's research in the field of chemistry?
She was the first woman to win a Nobel Prize in chemistry
What is the byproduct of fermentation, in addition to ethanol?
Carbon dioxide
Which of the following is a characteristic of a chemical reaction?
Formation of gas or a change in color
What is the role of chemists in their careers?
To discover new compounds, develop new materials, and find ways to improve existing products
What is the significance of Marie Curie's research?
It led to an understanding of radioactivity
What is the purpose of the ammonium dichromate volcano reaction?
To demonstrate chemical reactions and the formation of specific products
During fermentation, what is the primary source of energy for the microorganisms?
Glucose
Which of the following is a characteristic of chemical reactions that can be used to identify them?
Color change
What is the primary application of chemistry in the field of medicine?
Discovering new compounds
What is the primary purpose of the ammonium dichromate volcano reaction?
To create a visually spectacular reaction
What is the significance of Marie Curie's research in the field of chemistry?
She was a pioneer in the field of radioactivity
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