Objective Questions
All objective questions for CHM 101
Questions (1872)
| # | Question | Topic | Actions |
|---|---|---|---|
| 201 |
The success of science has been attributed to three of the following attitudes …
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| 202 |
A common disinfectant used in swimming pools is a compound of:
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| 203 |
An observation is said to be formal if?
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| 204 |
The known fact that earth's crust is divided into plates that move is a?
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| 205 |
Anecdotal evidence is?
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| 206 |
All of the options below are examples of physical changes except?
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| 207 |
Examples of chemical changes include all of the following except?
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| 208 |
Examples of homogeneous mixtures include all of the following except?
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| 209 |
The most common form of matter is
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| 210 |
The most common state of matter in the universe that are found in flames and li…
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| 211 |
The fourth state of matter was identified by?
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| 212 |
Which of the following is not true of a plasma?
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| 213 |
How many neutrons are present in the nuclide Na? (Not fully written, assumes ²³…
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| 214 |
A nuclide of oxygen can be represented as?
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| 215 |
Which of the following is not a property of group I elements?
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| 216 |
Determine the oxidation number of sulfur in H₂SO₄.
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| 217 |
Which of the following is not a property of the halogens?
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| 218 |
Which of the following element is used as an antiseptic on cuts?
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| 219 |
Which of the following does not leave taste or smell but disables the DNA of mi…
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| 220 |
The electronic configuration of copper (atomic number = 29) is
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| 221 |
Which of the following statement about the periodic table is correct?
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| 222 |
Elements on the right-hand side of the periodic table are?
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| 223 |
The distance from Lagos to Ibadan is 130.5 km. What is this distance in the SI …
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| 224 |
The mass of a cylinder was determined on an analytical balance to be 50.208 g. …
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| 225 |
The difference between an observed value and a true value of a measurement is c…
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| 226 |
A sample of water has a mass of 342.9 × 10⁻⁶ g at 31°C. What is the appropriate…
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| 227 |
The repeatability of a set of values is known as
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| 228 |
8.314 × 298 / 96485 to the correct significant figure and decimal place should …
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| 229 |
Calculate the number of oxygen atoms in 0.520 mol of CaCO₃
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| 230 |
When the equation MnO₄⁻ + Fe²⁺ → Mn²⁺ + Fe³⁺ is balanced in acidic medium, the …
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| 231 |
What is the molecular formula for a compound which contain 43.64% P and 56.36% …
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| 232 |
The percentage composition of chromium in BaCrO₄ is? [Ba = 137, Cr = 52, O = 16]
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| 233 |
Combustion analysis of 0.800 grams of an unknown hydrocarbon yields 2.613 g CO₂…
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| 234 |
When the equation Fe(s) + O₂(g) → Fe₂O₃(s) is balanced, the coefficients are
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| 235 |
In an experiment 23.41g of HCl was reacted with 20.00 g of NaOH to give 26.54g …
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| 236 |
If 26.54 g of NaCl was produced in the reaction in Question 73, the percentage …
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| 237 |
In which state of matter do particles have the greatest freedom of movement?
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| 238 |
The standard enthalpy of formation of H₂O(l) at 298 K is -286 kJ mol⁻¹. What is…
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| 239 |
In Rutherford's gold foil experiment, what observation led to the conclusion th…
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| 240 |
Which statement best describes the relationship between a scientific theory and…
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| 241 |
In the reaction between permanganate (MnO₄⁻) and oxalate (C₂O₄²⁻) in acidic sol…
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| 242 |
The presence of hydrogen in an organic compound can be detected by:
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| 243 |
Which of the following alkenes is the most stable?
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| 244 |
Given ΔHf°[HCl(g)] = -92 kJ/mol, ΔHf°[O₂(g)] = 0, and ΔHf°[H₂O(l)] = -286 kJ/mo…
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| 245 |
Which bond in a carbon-carbon double bond is stronger?
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| 246 |
What is the mass percent of chlorine in C₂H₃ClF₂? (C=12, H=1, Cl=35.5, F=19)
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| 247 |
The major product formed when propene reacts with HBr is:
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| 248 |
A set of experimental measurements yielded the following values: 2.45, 2.47, 2.…
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| 249 |
Who proposed that atoms of different elements combine in simple whole number ra…
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| 250 |
A scientific theory is best described as:
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| 251 |
Which of the following is an example of a homogeneous mixture?
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| 252 |
What is the mass percent of chlorine in C₂HClF₄? (C=12, H=1, Cl=35.5, F=19)
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| 253 |
The major product formed when 2-methylprop-1-ene reacts with HBr is:
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| 254 |
At equilibrium, which of the following statements is true?
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| 255 |
For the reaction 2A + B → C, the rate law is rate = k[A][B]². If [A] is halved …
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| 256 |
For the reaction: 2N₂O₅(g) → 4NO₂(g) + O₂(g), the rate of appearance of NO₂ is …
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| 257 |
Hydrogen in an organic compound can be detected by:
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| 258 |
The law of conservation of mass is used to:
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| 259 |
What is the mass of 2.0 moles of chlorine gas (Cl₂)? (Cl = 35.5 g/mol)
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| 260 |
If 36.0 g of glucose (C₆H₁₂O₆) is combusted completely, what mass of water is p…
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| 261 |
The correct cell notation for a Daniell cell (zinc-copper) is:
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| 262 |
The process of a liquid turning into a gas is called:
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| 263 |
Express 3.20 × 10⁻⁹ g in appropriate SI prefix units.
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| 264 |
The law of definite proportions states that:
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| 265 |
A 30.0 mL sample of H₂SO₄ requires 45.0 mL of 0.200 M NaOH to reach the equival…
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| 266 |
When a 5.00 g sample of NaOH is dissolved in 100.0 g of water in a calorimeter,…
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| 267 |
Democritus's atomic theory was primarily:
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| 268 |
John Dalton's atomic theory stated that atoms:
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| 269 |
Naturally occurring boron consists of 19.9% boron-10 (10.013 amu) and 80.1% bor…
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| 270 |
How many grams of AlCl₃ are needed to obtain 3.0 × 10²³ Cl⁻ ions? (Al=27, Cl=35…
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| 271 |
A 25.5 mL aliquot of HCl (aq) of unknown concentration was titrated with 51.2 m…
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| 272 |
The atomic masses of Cl (75.53%) and (24.47 %) are 34.968 amu and 36.956 amu re…
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| 273 |
For the following reaction, DP(CH₄)/Dt was found to be -6.2 x 10⁻³ atm/s. CH₄(g…
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CHM 101 Past Questions | View |
| 274 |
Lead ions can be precipitated from aqueous solutions by the addition of aqueous…
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| 275 |
Determine the number of significant figures in the following measurements 345 c…
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| 276 |
Which of the following affects the value of the solubility product, Ksp, of sil…
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| 277 |
How many grams of MgCl₂ is needed to obtain 5.0 x 10²³ ions?
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| 278 |
What is the mass percent composition of bromine in haloethane (C₂HBrClF)?
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| 279 |
The reaction A + 2B → products was found to have the rate law, rate = k[A] [B]²…
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| 280 |
Calculate the pH of 0.002 mol dm⁻³ solution of calcium hydroxide.
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| 281 |
What was Aristotle idea about atoms?
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| 282 |
Given the following reactions and their enthalpy changes: C(s) + O₂(g) → CO₂(g)…
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| 283 |
For the reaction: 2H₂(g) + O₂(g) → 2H₂O(l), 571.6 kJ of heat is released. How m…
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| 284 |
Calculate the standard enthalpy change for the reaction: N₂(g) + O₂(g) → 2NO(g)…
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| 285 |
Which of the following best describes the nature of science?
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| 286 |
Which attitude is most essential for a scientist to have?
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| 287 |
A certain sample contains 4.86 moles of calcium carbonate. What is the mass of …
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| 288 |
A scientific law is best described as a:
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| 289 |
Anecdotal evidence is often considered unreliable in science because it:
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| 290 |
Which of the following is a chemical change?
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| 291 |
Which of the following is a physical change?
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| 292 |
Which of the following is an example of a heterogeneous mixture?
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| 293 |
Plasmas are found in natural phenomena such as:
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| 294 |
The scientist who first identified the fourth state of matter is:
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| 295 |
Which of the following statements about plasma is true?
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| 296 |
How many neutrons are present in an atom of potassium-39 (³⁹K)? (Atomic number …
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| 297 |
A common isotope of carbon is represented as:
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| 298 |
An element belonging to Group 2 of the periodic table is:
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| 299 |
A characteristic property of Group 1 elements (alkali metals) is that they:
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| 300 |
The family name for Group 17 elements is:
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