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WorksheetsSBA MOCK TEST
Total questions: 30
Worksheet time: 42mins
1. A gas is a form of matter that
has a definite volume.
is difficult to compress.
takes the shape and volume of its container.
is generally a liquid or solid at room temperature.
2. Naphthalene or mothball is an example of a substance that changes directly from solid to gas without melting. This type of change is called
condensation.
sublimation.
deposition.
freezing.
3. Which of the following molecules is expected to be stable?
NH
NH2
NH3
NH4
4. If atom X consists of 22 protons, 22 electrons, and 26 neutrons, what is the mass number of atom X?
mass number = 48
mass number = 44
mass number = 4
mass number = 0
5. Sulfuric acid reacts with sodium hydroxide to form sodium sulfate and water. The chemical equation is given below:
__ H2SO4 + __ NaOH → __ Na2SO4 + __ H2O
What is the sum of the coefficients when you balance the equation?
4
6
8
10
6. Which of the following is the correct electron configuration of Ca2+ ion?
1s2 2s2 2p6
1s2 2s2 2p6 3s2
1s2 2s2 2p6 3s2 3p6
1s2 2s2 2p6 3s2 3p6 4s2
7. In an experiment to determine the unknown substance, Mary used a universal indicator to determine the pH of the substance. When she compared it to the pH color range, it was determined that the substance has a pH of 5. Mary concluded then that the unknown substance is a
weak acid.
weak alkali.
strong acid.
strong alkali.
8. Three moles of aluminum are added with excess hydrochloric acid. How many moles of hydrogen gas are produced?
2Al + 6HCl → 2AlCl3 + 3H2
3.0 moles
3.5 moles
4.0 moles
4.5 moles
9. How many H atoms are in 3.4 g of C12H22O11?
(Atomic Mass C=12; H=1; O=16)
6.0x1021
3.8x1022
1.3x1023
6.0x1023
10. Burning of fossil fuels during combustion produces harmful gases. Which of the following products of combustion is responsible for the formation of acid rain?
Sulfur dioxide
Carbon dioxide
Nitrogen oxide
Carbon monoxide
11. Metal carbonates react with acid to form
salt and hydrogen.
salt and carbonated water.
salt, carboxylic acid, and water.
salt, carbon dioxide, and water.
12. In general, the pressure of a gas is directly proportional to the Kelvin temperature,
if the mole is large.
if the volume is small.
if the volume is kept constant.
if the temperature is expressed in degrees Celsius.
13. How many protons and neutrons will a radon-210 (Rn-210) isotope contain?
protons= 86 ; neutrons= 124
protons= 86 ; neutrons= 136
protons= 124 ; neutrons= 86
protons= 136 ; neutrons= 86
14. What happens when the particles in a liquid move slowly that they begin to take a fixed position?
Melting
Freezing
Vaporizing
Condensing
15. Aluminum hydroxide is used to treat heartburn, upset stomach or acid indigestion. It decomposes to produce aluminum oxide and water. Which of the following balanced equations shows the CORRECT decomposition of aluminum hydroxide?
AlO2H → AlO + HO
Al(OH)2 → AlO + H2O
2Al(OH)2 → Al2O2 + 2H2O
2Al(OH)3 → Al2O3 + 3H2O
16. Ammonium phosphate is one of the ingredients in making fertilizers because it contains a high source of elemental nitrogen. Which of the following is the correct chemical formula of ammonium phosphate?
NHPO
NH4PO4
(NH4)3PO4
NH4(PO4)2
17. What happens when a liquid water evaporates?
The water increases in mass.
The force of attraction increases.
The water molecules break apart into atoms.
The kinetic energy of the molecules increases.
18. When the equation SiO2 + C → SiC + CO is correctly balanced, the sum of all the coefficients is
6
7
8
9
19. Consider the relative abundance of the isotopes of element X.
Isotope Relative Abundance (%)
234X 60
235X 30
238X 10
What is the relative atomic mass of X?
235
236
237
238
20. Which of the following is NOT an ionic compound?
NaI
CaS
CO
Na2O
21. Which statement BEST describes the particles of a substance in solid state?
They are not moving at all.
They slide over each other.
They move at a great speed.
They vibrate and rotate about a fixed position.
22. When combining with non-metal atoms, metallic atoms generally
lose electrons and form positive ions.
lose electrons and form negative ions.
gain electrons and form positive ions.
gain electrons and form negative ions.
23. In Charles’ Law, the volume of a gas is directly proportional to its Kelvin temperature if the
pressure increases.
pressure is kept constant.
number of particles increases.
number of particles decreases.
24. Which of the following molecules has one lone pair of electrons?
CH4
HCl
H2O
NH3
25. The formula for carbon tetrachloride is
CCl
C4Cl
CCl2
CCl4
26. All of the following formulas of alkali are correct EXCEPT
KOH
Al(OH)2
Mg(OH)2
Ca(OH)2
27. What diatomic molecule has a triple covalent bond?
F2
H2
N2
O2
28. Which is a FALSE statement about the Kinetic Particle Theory of Matter?
It explains why liquid water has a fixed volume.
It explains why oxygen gas can be compressed.
It describes the orderly arrangement of particles of solid iron.
It describes how sugar changes color when it is strongly heated.
29. Expanded polystyrene foam, commonly known as Styrofoam, is a synthetic polymer made by using expanders such as methylene chloride and chlorofluorocarbon. Which environmental problem is associated with CFC?
El Nino
La Nina
Water Pollution
Ozone depletion
30. What pressure must be applied to 225 mL of gas at 1 atm to reduce its volume to 100 mL?
0.44 atm
2.25 atm
1,710 atm
22, 500 atm
