Physical Science Part II
Quiz by TEACHER MARLENE
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- Q1
If 3 moles of hydrogen gas (H₂) and 2 moles of oxygen gas (O₂) are reacted, how many moles of water (H₂O) will be formed?
3 moles of water
4 moles of water
1 mole of water
2 moles of water
30s - Q2
Chlorox bleach is a chemical that is diluted and sold for household use. It is a mixture of water and the chemical sodium hypochlorite. What is the primary function of bleach in cleaning products?
Adding fragrance to the product
Improving the product's consistency
Disinfecting and whitening surfaces
Removing grease from surfaces
30s - Q3
A chemist is studying the properties of a new synthetic polymer. The polymer is nonpolar. In which of the following solvents would the polymer be most soluble?
Hexane
Water
Ethanol
Acetone
30s - Q4
A food scientist is developing a new flavoring agent. The flavor molecule is nonpolar. In which of the following substances would the flavor molecule be most soluble?
vegetable oil
alcohol
water
vinegar
30s - Q5
Two molecules, A and B, have the same molar mass. Molecule A has a boiling point of 78°C, while molecule B boils at 110°C. Based on this information, evaluate the intermolecular forces at play and propose how the structural properties of each molecule contribute to the observed boiling points. Consider how polarity, hydrogen bonding, and other intermolecular interactions might differ between the two molecules to justify your explanation.
Molecule B is ionic, while molecule A is covalent.
Molecule B has weaker dispersion forces than a molecule.
Molecule A is nonpolar, and molecule B is polar with dipole-dipole forces.
Molecule A has stronger hydrogen bonding than molecule B.
30s - Q6
A genetic mutation changes the sequence of amino acids in protein, altering its primary structure. Since the primary structure serves as the foundation for the protein's folding and overall shape, this mutation may disrupt the chemical interactions (such as hydrogen bonds, ionic bonds, and hydrophobic interactions) that maintain the protein's specific shape. Considering the relationship between structure and function, how might this mutation affect the protein's ability to function properly?
The mutation may have no significant effect if the altered amino acids are not involved in maintaining the protein's shape or function.
The mutation could cause misfolding of the protein, leading to aggregation or degradation, which prevents the protein from performing its intended role in the cell.
The change in the amino acid sequence could disrupt key chemical interactions, potentially causing the protein to lose its specific three-dimensional shape and impairing its ability to function.
If the mutation alters amino acids critical for the protein’s active site or binding region, the protein may lose its ability to interact with other molecules, resulting in loss of function.
30s - Q7
A powdered solid is added to a liquid reactant in a reaction. The reaction is faster when the solid is finely powdered compared to when it is in large chunks. Additionally, the reaction rate increases as the temperature of the liquid reactant is raised. How do particle size and temperature influence the rate of this reaction?
Smaller particles have more surface area, which leads to more collisions with the liquid reactant, while higher temperatures increase the energy of the particles, leading to faster collisions and a faster reaction.
Fine particles have less surface area and cause fewer collisions, but lower temperatures allow for more energy transfer during collisions, speeding up the reaction.
Larger particles cause fewer collisions, but higher temperatures reduce the energy needed for each collision, speeding up the reaction.
Larger particles lead to more surface area for collisions, but lower temperatures help particles collide more effectively, slowing the reaction.
30s - Q8
A small farming community wants to reduce its environmental impact while generating energy from waste. Which source would best suit their needs, and why?
Fossil fuels, because they are cost-effective and reliable.
Batteries, because they store energy efficiently
Geothermal, because it produces consistent energy in all locations.
Biogas, because it uses farm waste and produces renewable energy.
30s - Q9
Scenario: You are tasked with choosing the appropriate cleaning product for a kitchen counter top that has both greasy stains and lime scale deposits. You have access to four different cleaning products, each with a specific formulation. Based on your understanding of the ingredients in the product labels, you need to select the most effective cleaner for this task. Which of the following cleaning products would you apply to remove both grease and lime scale from a kitchen countertop, considering the active ingredients in each product?
A product containing Sodium Hypochlorite, Acetic Acid, and Water
A product containing Sodium Lauryl Sulfate, Citric Acid, and Fragrance
A product containing Ammonium Hydroxide, Hydrogen Peroxide, and Methylisothiazolinone
A product containing Isopropyl Alcohol, Sodium Carbonate, and Colorant
30s - Q10
While cleaning glass windows, you notice that the cleaning product you are using leaves unsightly streaks on the surface, diminishing its effectiveness and leaving the glass less clear. Which specific ingredient could be added to the formulation to enhance the product’s performance and ensure a streak-free finish?
Preservatives, to prevent microbial growth.
Thickeners, to make the product less runny.
Ammonia, to cut through grease and evaporate quickly.
Colorants, to improve the appearance of the cleaner.
30s - Q11
The ingredients in a product, especially in cleaning products, serve multiple crucial roles, and each ingredient is selected to fulfill a specific function to ensure the product works effectively. Understanding the importance of each ingredient can help you choose the best product for your needs and ensure safety, performance, and efficiency. Given the following ingredients, which combination would you select for creating an effective yet safe commercial kitchen cleaner and why?
Sodium Lauryl Sulfate, Isopropyl Alcohol, Water, Sodium Benzoate
Hydrogen Peroxide, Sodium Lauryl Sulfate, Water, Xanthan Gum
Sodium Hydroxide, Sodium Lauryl Sulfate, Isopropyl Alcohol, Fragrance
Ammonium Hydroxide, Citric Acid, Water, Colorant
30s - Q12
How the Big Bang Theory supports the idea of the creation of the universe?
Galaxies are moving through space, not with space.
The universe become hot as it expanded that causes protons and neutrons came together by nuclear fusion.
The Big Bang was an explosion that carried matter outward from a point.
The evidence of cosmic microwave background, or energy that was left as result of recombination.
30s - Q13
Big Bang Model shows scientific evidences that the universe once began to expand and continues to expand until today. The following are the evidences, EXCEPT ____________.
An explosion that carried matter outward from a point
Cosmic microwave background is the afterglow of radiation when early stage of the universe was hot and dense then undergo a cooling process.
Nucleosynthesis as the reaction began with fusion of protons and neutrons forming nuclei.
Hubble expansion which states that other galaxies are moving away relative to the Milky Way at a rate proportional to distance.
30s - Q14
What measures the relative tendency of an atom to attract electrons to itself when chemically combined with another atom?
electronegativity
ionization energy
atomic size
electron affinity
30s - Q15
Which drink sources contains lactose?
juice
milk
beer
wine
30s