Free Standard Temperature and Pressure MCQs with Answers
27 Standard Temperature and Pressure MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Standard temperature and pressure provide reference conditions for gas calculations: 0°C or 273 K and, in the usual school convention, 1 atm pressure. Questions use these conditions to relate pressure, volume, temperature and amount of gas, including the molar volume of an ideal gas, about 22.4 dm³.
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27 questions · page 1 of 2
- A. 25 degrees C and 1 atm
- B. 0 degrees C and 1 atm
- C. 0 K and 1 atm
- D. 25 degrees C and 760 mm of mercury above atmospheric
Explanation: STP is 273.15 K, which is 0 degrees Celsius, at a pressure of 1 atmosphere or 760 mm of mercury.
Correct answer: 0 degrees C and 1 atm- A. 25 degrees Celsius and 1 atm
- B. 0 degrees Celsius and 1 atm
- C. 0 K and 1 atm
- D. 100 degrees Celsius and 1 atm
Explanation: STP is 273.15 K, that is 0 degrees Celsius, at one atmosphere, and it is under these conditions that a mole of gas occupies 22.4 dm3.
Correct answer: 0 degrees Celsius and 1 atm- A. SO3
- B. SO2
- C. C6H6
- D. C3H8
Explanation: At STP, 1 mol of gas occupies 22.4 dm3. The amount of gas is 8.4 dm3/22.4 dm3 mol-1 = 0.375 mol, so its molar mass is 24 g/0.375 mol = 64…
Correct answer: SO2- A. Pascal
- B. Torricelli
- C. Newton
- D. Huygen
Explanation: Evangelista Torricelli invented the mercury barometer by showing that atmospheric pressure could support a column of mercury.
Correct answer: Torricelli- A. 1 atm
- B. 760 Torr
- C. 76cm of Hg
- D. All of these
Explanation: Standard atmospheric pressure at sea level and 0 °C is 1 atm, which is equivalent to 760 torr and a 76 cm column of mercury.
Correct answer: All of these- A. 0.1526 atm
- B. 116 mm of Hg
- C. 116 torr
- D. 1 atm
Explanation: A partial pressure is only the pressure contributed by one gas, so oxygen cannot have a partial pressure of 1 atm in the lungs because…
Correct answer: 1 atm- A. 2.24 dm3
- B. 22.4 dm3
- C. 1.12 dm3
- D. 112 dm3
Explanation: The molar mass of N2 is 2 x 14 g mol^-1 = 28 g mol^-1, so 2.8 g represents 2.8 g / 28 g mol^-1 = 0.10 mol.
Correct answer: 2.24 dm3- A. 3.5 atm
- B. 1 atm
- C. 3 atm
- D. 1.25 atm
- E. 2.25 atm
Explanation: 1 atm -> 760 torr X atm ->950 torr X=1.25 atm
Correct answer: 1.25 atm- A. 400 torr
- B. 50662 Pa
- C. 101.3 Pa
- D. 8.5 pounds
Explanation: Atmospheric pressure on sea level is 101,325 Pa/760 torr/14.7 pounds per inch.
Correct answer: 50662 Pa- A. 1.050
- B. 10.38
- C. 1.380
- D. 2.760
Explanation: The torr is a unit of pressure defined as exactly 1/760 of a standard atmosphere.
Correct answer: 1.380- A. 350 K
- B. 343 K
- C. 300 K
- D. 283 K
Explanation: To convert temperature from celsius to kelvin scale the formula is °C + 273.15 K 70° + 273.15 =343 K.
Correct answer: 343 K- A. 754 torr
- B. 54.6 mm of water
- C. 1.01 atm
- D. 74.0 cm Hg
Explanation: 1 inch of Hg = 2.54 cm of Hg 30.2 inches of Hg = 30.2 (2.54) cm of Hg = 30.2 (5.08/2) = 15.1(5.08) = 76.7 cm of Hg = 767 torr 760 torr = 1…
Correct answer: 1.01 atm- A. Nm-2
- B. Nm2
- C. mm of Hg
- D. atm
Explanation: Pressure:Pressure is defined as force per unit area. P = F/ A---> P = N/m^2---> P = Nm^-2 Hence, A is the correct option.
Correct answer: Nm-2- A. 76cm
- B. 76mm
- C. 76dm
- D. 76pm
Explanation: At sea level, the atmosphere exerts a pressure of 760mm Hg. This is used to define another pressure unit called the atmosphere (atm).One…
Correct answer: 76cm- A. 16 torr
- B. 159 torr
- C. 158 torr
- D. 157 torr
Explanation: Option B is correct as group level partial pressure effect oxygen is "159 torr". Any less than that causes discomfort in breathing.
Correct answer: 159 torr- A. 10:1
- B. 1:2
- C. 2:3
- D. 3:2
- E. 2:1
Explanation: No of moles=mass in g/MrMoles of water = 18/18 =1 mol 1mol=24dm3 so volume of water is also 24dm3 Moles of CO2= 4.4/44 = 0.1 moles0.1x24=…
Correct answer: 10:117. Liquid in the container has a temperature 70°C. What will be the temperature on the Kelvin scale?
- A. 350 K
- B. 343 K
- C. 300 K
- D. 283 K
Explanation: To convert temperature from celsius to kelvin scale the formula is: °C + 273.15 K 70° + 273.15 = 343 K Therefore, option b is correct.
Correct answer: 343 K- A. 273.16 K and 1 atm
- B. 0oC & 1 mm Hg
- C. 273.16oC & 1 atm
- D. 0 K & 1 atm
Explanation: The standard temperature and pressure are 273.16K (0oC) and 1 atm. All the remaining options are incorrect.
Correct answer: 273.16 K and 1 atm- A. 2.24 dm3
- B. 6.44 dm3
- C. 1.12 dm3
- D. 112 dm3
Explanation: First, we find out the number of moles using the formula moles = mass/MrMr of nitrogen will be 14+14 = 28So 8/28 = 0.28Then we use volume…
Correct answer: 6.44 dm3- A. Atm
- B. Pascal
- C. mm of Hg
- D. Millibar
Explanation: Correct option is D. Meteorologists use a metric unit for pressure called a millibar.
Correct answer: MillibarStandard Temperature and Pressure MCQs: common questions
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There are 27 Standard Temperature and Pressure MCQs in the Chemistry bank, shown 20 to a page with the correct answer and an explanation on each.
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