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- Q1
1. How many atoms of the elements should be on the product side after the chemical reaction?
same as the reactant
it doesn’t matter
less than the reactant
more than the reactant
45s - Q2
Which is/are TRUE about the Law of Conservation of Mass?
I. The mass of the reactants is equal to the mass of the product.
II. The number of atoms in the reactant is the same as the number of atoms in the product.
III. The number of moles in the reactants is the same as the number of moles in the product.
IV. The masses ofthe reactant and product are the same, but the moles are different.
I and II
II,III, IV
I,II, III
II and IV
60s - Q3
3. What the type of chemical reaction is shown in
2KBr (s) + Cl2 (g) → 2KCl (s) + Br2 (l)?
Double Replacement
Decomposition
Single Replacement
Combination
45s - Q4
4. You need a steady supply of amino acids in your diet to maintain a healthy body. To meet this need, you should make sure you eat enough of which class of biomolecule?
Lipids
Proteins
Carbohydrates
Nucleic Acid
45s - Q5
5. Which food group is high in carbohydrates?
Butter,oil, lard
Meats,cheeses, milk, eggs
Apples,bananas, grapes
Bread, pasta, grain
45s - Q6
6. What is the monomer for a protein from meat, fish, eggs, beans, bread, nuts, and seeds?
Triglyceride
Monosaccharide
Nucleotide
Amino acid
45s - Q7
7. Why is gas easier to compress than liquid and solid?
The space between gas particles is much larger than the space between liquid or solid particles
The volume increases more under pressure than an equal volume of solid does.
The volume of gas particles is larger compared to the overall volume occupied by the gas.
Its volume increases more under pressure than an equal volume of liquid does.
60s - Q8
8. Which phenomenon best illustrates Charles’ Law?
The leavening agent causing the fluffiness of cake products.
Carbon dioxide is dissolved in water.
Expansion of the balloon as it is being submerged in hot water.
Breathing apparatus being used by a patient.
45s - Q9
9. If a balloon is squeezed, what happens to the pressure of the gas inside the balloon?
The pressure depends on the type of gas in the balloon.
It decreases.
It stays the same.
It increases.
45s - Q10
10. Based on this unbalanced equation CaCO3 → ____+ CO2, what would be the other product?
C
O2
CaO
CO
45s - Q11
11. The products derived from a combustion reaction are _____?
CO2+ O2
C +H2O
CO2+ H2
CO2 + H2O
45s - Q12
12. The other product for this equation,
2 HCl(aq) + Zn(s) → ZnCl2 (aq) + ____ is
H2O(l).
H2 (g).
Cl2(g).
H2O2(g)
45s - Q13
13. Which concentration of ethyl alcohol is better to use for disinfection?
20%
50%
70%
30%
45s - Q14
14. Which of the following could explain the rotting of sliced apples when not being refrigerated?
Catalyst
Concentration
Temperature
Surface area
45s - Q15
15. The higher the temperature is, the faster is the rate of reaction because __________.
more molecules collide with other molecules.
less molecule collides with other molecules.
molecules become larger.
molecules become smaller in size.
45s