E-PolyLearning

51. In mass spectrometer M/E is plotted on
a. x axis
b. y axis
c. z axis
d. both a and b
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Answer: (a).x axis

52. Metals usually form
a. anions
b. cations
c. no ions
d. neutral
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Answer: (b).cations

53. A negative ion is called as
a. anion
b. cation
c. molecule
d. atom
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Answer: (a).anion

54. A molecule is a smallest particle which can exist
a. independently
b. in combination
c. in space
d. in gas form
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Answer: (a).independently

55. Gram atomic mass of usually occurring uranium is
a. 239
b. 238
c. 235
d. 236
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Answer: (b).238