SECTION — A (Marks 12)
Q. 1 Circle the correct option i.e. A/B/C/ D. Each part carries one mark.
Consider the following data:
Sr. No X Y X / Y
1 1.00 273 0.0037
2 1.37 373 0.0037
3 1.73 473 0.0037
4 2.10 573 0.0037
Which of the following relationships does the above table represent?
X ∝ y B. x = y C. x ∝ 1/y D. x = 1/y
Relationship “PV =Constant” represents:
A. Avogadro’s Law B. Boyle’s Law C. Charle’s Law D. General gas equation
‘V ∝ T’ Relationship represents:
A. Boyle’s law B. Charle’s law C. Avogadro’s law D. General gas equation
At sea level at 0°C, the atmospheric pressure is?
760 torr B. 762 torr C. 764 torr D. 766 torr
In which type of matter, particles are closely packed together and have fixed positions?
Solids B. Liquids C. Gas D. Plasma
SECTION — B (Marks 33)
Q2. Answer any parts. The answer to each part should not exceed three to four lines. (5 x 5 = 25)
Differentiate between Diffusion and Effusion of Gasses. Also give examples.
Why does evaporation lower the temperature of Liquids?
A bacterial culture isolated from sewage produces 36.4 cm3 of methane (CH4) gas at 27°C’ and 760 mm Hg Pressure. This gas occupies 33.124cm3 at 0 °C’and same pressure. Explain volume — temperature relationship from this data.
Give reasons for the following.
Why are gases highly compressible?
Why do gases have relatively low densities under normal conditions?
Express the pressure 400mm Hg in kPa.
SECTION — C (Marks 20)
Note: Attempt any TWO questions. All questions carry equal marks. (2 x 10 = 20)
Q.3 The following table shows data of volume of a gas and its temperature for the given mass of a gas at 900 mmHg
Temperature – Volume data for a gas at 900 mm of Hg.
Temperature (° C) 0 5 10 15 20
Volume (cm3) 107.9 109.7 111.7 113.6 115.5
Explain volume – temperature relationship using Charles’s law.
Q.4 Write a note on the following; Boyle’s law, Charle’s law (also draw graph).