Question 71 : Lighter gas diffuses ___ than heavier gases
1. More readily
2. Less readily
3. Very slowly
4. None of above
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Question 72 : The internal resistance of a liquid to flow is called?
1. Viscosity
2. Vapour pressure
3. Surface tension
4. Capillary action
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Question 73 : When all the angles of system is equal to 90°, i.e. α = β = γ = 90° but the sides are not equal the system is said to be?
1. Orthorhombic
2. Cubic
3. Tetragonal
4. Trigonal
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Question 74 : The state of matter in which the tendency of compressibility is almost zero is?
1. Liquid state
2. Solid state
3. Gaseous state
4. In all the states
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Question 75 : The property of crystals in which the physical properties are different in different direction is called?
1. Cleavage
2. Isomerism
3. Anisotropy
4. Isotropy
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Question 76 : The two substances having same.crystals are said to be?
1. Isomers
2. Polymorphous
3. Isotopes
4. Isomorphous
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Question 77 : The existence of different crystalline forms of the same substance is called?
1. Isotopes
2. Isomerism
3. Polymorphism
4. Isomorphism
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Question 78 : Boyle's Law relates?
1. Pressure & Temperature
2. Temperature & volume
3. Pressure & volume
4. Volume & number of molecules
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Question 79 : The Boiling point of pure' water as?
1. 100°F
2. 373 K
3. 32°C
4. 273 K
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Question 80 : Effusion is the escape of gas through?
1. Porous container
2. A small pin hole
3. Permeable membrane
4. Semi permeable membrane
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