E-PolyLearning

41. Properties in which isotopes differ are
a. Chemical
b. Physical
c. electrical
d. mechanical
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Answer: (b).Physical

42. Value of molar volume is
a. 22.14 dm3
b. 25.14 dm3
c. 32.14dm3
d. 44.14dm3
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Answer: (a).22.14 dm3

43. Atomic mass is mass of carbon taken as
a. 12
b. 13
c. 14
d. 15
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Answer: (a).12

44. Species having a negative or positive charge are
a. Radicals
b. atoms
c. molecules
d. ions
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Answer: (d).ions

45. Relative atomic mass of Cu is
a. 61.5
b. 63.5
c. 64.5
d. 67.5
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Answer: (b).63.5