MULTIPLE CHOICE QUESTIONS 1) A metal cylindrical sleeve has inner radius A and a

Question

MULTIPLE CHOICE QUESTIONS 1) A metal cylindrical sleeve has inner radius A and an outer radius B. The metal has a positive thermal expansion coefficient. When the sleeve's temperature increases (a) The outer radius decreases and the inner radius increases (b) The inner radius decreases and the outer radius increases (c) Both the inner and outer radii decrease (d) Both the inner and outer radii increase (e) the sleeve's length decreases 2) For a fixed amount of an ideal gas, if the abosulte temperature of the gas is doubled what happens to the pressure of the gas? (a) The answer cannot be determined without volume information (b) The pressure of the gas becomes double the original pressure c) The pressure of the gas becomes triple the original pressure (d) The pressure of the gas becomes one half of the original pressure (e) The pressure of the gas becomes four times the original pressure 3) The number of molecules in one mole of a substance (a) depends on the molecular weight of the substance (b) depends on the atomic weight of the substance (cdepends on the density of the substance (dy depends on the temperature of the substance (e) is the same for all substances Pres its on ose-halt i change in temperature. What happens to the average speed of the molecules in the sample? (a) It does not change (b) It quadruples (c) It doubles (d) It halves (e) None of the above 5) The three phases of matter can exist together in equilibrium at the (a) critical point (e) melting point (b) triple point (d) boiling point (e) evaporation point 0 The procssin fe PV diagam is an (a) adiabatic expansion (b) isothermal expansion (c) isometric expansion. (d) isobaric expansion (e) isovolumetric cpmpression

Explanation / Answer

1-E

Positive thermal coefficient of a metal make it expand with increase in temperature. It does not matter whether it is inner or outer radius.

2-A

By Gay-Lussac law , for fixed mass and fixed volume the pressure is directly proportional to temperature.

But here we don't know if volume is fixed or not.

3-E

Number if molecules in one mole if any substance is equal to Avogadro number =6.022 ×10^23

4-A

The average speed depends on temperature and molecular weight. Both are constant here. So no change in speed.

Related Questions

Navigate

• Browse (All)
• Browse M
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.