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441.

A balloon filled with ethane is pricked with a sharp point and quickly dropped in a tank of H2 gas under identical conditions. After a while the balloon will have
(a)Shrunk
(b)Enlarged
(c)Completely collapsed
(d)Remained unchanged in size
Comment
Answer is: B

442.

Consider the followings
1. Viscosity is the reciprocal of fluidity.
2. Molecular interactions between molecules in order
Solid > Liquid > Gas
3. If surface area increases, rate evaporation decreases.
4. Glass is a super cooled liquid.
Which of the above is/are true?
(a)Only 2
(b)2 and 3
(c)1, 2 and 4
(d)2, 3 and 4
Comment
Answer is: C

443.

Consider the following statements
1. A real gas can approximated as an ideal gas when it is highly dilute.
2. Only monoatomic gases can be approximated as ideal gases.
3. An ideal gas does not undergo phase transitions.
Which of the above statements are correct?
(a)1 and 2
(b)1 and 3
(c)2 and 3
(d)1, 2 and 3
Comment
Answer is: B

444.

Consider the following statements
1. The difference between the moisture holding capacity of air and its actual humidity is called saturation deficit.
2. The temperature to which air has to be cooled in order to reach saturation is called dew point.
Which of the statements given above is/are correct?
(a)Only 1
(b)Only 2
(c)Both 1 and 2
(d)Neither 1 nor 2
Comment
Answer is: C

445.

Consider the following statements
1. All liquids have concave meniscus.
2. All liquids have convex meniscus.
3. Mercury has convex and other liquids have concave meniscus.
4. Mercury has concave and other liquids have convex meniscus.
Which of the above is/are true?
(a)Only 1
(b)Only 2 and 3
(c)Only 3
(d)None of the above
Comment
Answer is: C

446.

Consider the following statements
1. One water molecule forms four H-bonds.
2. Water has high boiling point due to high dipole moment.
3. When ice is melt, collapse of structure leads to increase in density.
Which of the statements given above is/are correct?
(a)1, 2 and 3
(b)1 and 3
(c)2 and 3
(d)Only 2
Comment
Answer is: A

447.

In general equation PV = nRT, V is the volume of
(a)N mole of a gas
(b)Any amount of gas
(c)One mole of gas
(d)One gram of a gas
Comment
Answer is: A

448.

Consider the following statements
1. Evaporation is a surface phenomenon.
2. The rate of evaporation depends upon the surface area exposed to the atmosphere, the temperature, the humidity and the wind speed.
3. Evaporation causes cooling.
which of the statements given above are correct about evaporation?
(a)1 and 2
(b)1 and 3
(c)2 and 3
(d)1, 2 and 3
Comment
Answer is: D

449.

Consider the following statements
1. The forces of attraction between the particles are maximum in solids, intermediate in liquid and minimum in gases.
2. Sublimation is the change of gaseous state directly to solid state without going through liquid state, the vice versa.
Which of the statements given above is / are correct?
(a)Only 2
(b)Only 1
(c)Both 1 and 2
(d)None of the above
Comment
Answer is: C

450.

If a gas is compressed of half of its original volume of 27oC, to what temperature should be heated to make it occupy its original volume.
(a)327oC
(b)600oC
(c)54oC
(d)300oC
Comment
Answer is: A

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