Question:- 1. Which one of the following sets of phenomena would increase on raising the temperature?
Answer: (c) Evaporation, diffusion, expansion of gas
Question:- 2. Seema visited a Natural Gas Compressing Unit and found that the gas can be liquefied under specific conditions of temperature and pressure. While sharing her experience with friends she got confused. Help her to identify the correct set of conditions
Answer: (c) Low temperature, high pressure
Question:3-The property to flow is unique to fluids. Which one of the following statements is correct?
Answer: (c) Gases and liquids behave like fluids
Question: -4. During summer, water kept in an earthen pot becomes cool because of the phenomenon of
Answer: (d) Evaporation
Question: -5 -A few substances are arranged in the increasing order of ‘forces of attraction’ between their particles. Which one of the following represents a correct arrangement?
Answer: (c) Oxygen, water, sugar
Question: -6 -On converting 25°C, 38°C and 66°C to kelvin scale, the correct sequence of temperature will be
Answer: (a) 298 K, 311 K and 339 K
Question: - 7. Choose the correct statement of the following
Answer: (b) conversion of vapours into solid without passing through the liquid state is called sublimation.
Question: -8 -The boiling points of diethyl ether, acetone and n-butyl alcohol are 35°C, 56°C and 118°C respectively. Which one of the following correctly represents their boiling points in kelvin scale?
Answer: (c) 308 K, 329 K, 391 K
Question: -9 -. Which condition out of the following will increase the evaporation of water?
Answer: (a) Increase in temperature of water
Question: -10 -In which of the following conditions, the distance between the molecules of hydrogen gas would increase?
Answer: (c) (ii) and (iii)
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