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WorksheetsPre-Test Physical Science
Total questions: 15
Worksheet time: 8mins
Which of the following elements is not produced during stellar nucleosynthesis?
lithium
neon
oxygen
iron
What is formed when a neutron and a proton fused during the big bang nucleosynthesis?
electron
deuterium
neutrino
positron
What refers to the relative ability of a bonded atom to attract toward itself a shared electron paired?
valence electrons
molecular shape
electronegativity
dipole
The following terms are not used when dealing with liquid substances EXCEPT,
soluble
dipole
miscible
polar bond
Which of the following influence the chemical and physical properties of substances?
Molecular size, shape, and bond strength.
Molecular shape and its polarity.
Molecular size and bond strength.
Molecular sizes and shapes, as well as polarity and bond strength.
Dispersion forces are also called London forces. Which of the following German physicists postulated their existence?
Albert Einstein
Philipp Lenard
Fritz London
Hermann Von Helmholtz
When you fry an egg which level of protein structure will most likely remain intact or sustain lesser damage?
primary structure
Secondary structure
Tertiary structure
Quaternary structure
Which IMFA is present in all substances?
Dipole-dipole interaction
H-bonding
Induced dipole-induced dipole interaction
Ion-dipole interaction
Which of the following will hasten the rate of reaction?
adding a catalyst
diluting the reactants
decreasing the surface area of a reactant
decreasing the temperature of the reaction
What will be observed in general in an endothermic reaction?
formation of gas
emission of light
decrease in temperature of the system
increase in temperature of the system
For the reaction of nitrogen gas with hydrogen gas to produce ammonia gas, how many moles of N2 are required to produce 30 mol of NH3?
N2 + 3H2 -------> 2NH3
9 mol
1 mol
6 mol
None of the above.
Which of the following reduces the cleaning ability of soap?
hard water
micelle
soft water
surfactant
Which of the following is true about active ingredients?
The active ingredient in lotions is the solvent.
The active ingredients in detergents is the bleaching agent.
Active ingredients are added to dilute other components in cosmetic products.
In disinfectants, the active ingredient is the substance that kills microorganisms.
Which of the following inert ingredients are reported to cause allergic reactions?
lactose
soya lecithin
both a and b
either a nor b
Which is NOT an observable evidence for the big bang model?
big bang nucleosynthesis
cosmic microwave background
cosmic ray spallation
Hubble expansion
