Everyday Science MCQs

5120 MCQs  (Page 159 of 512)

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When cationic molecular ions are allowed to pass through strong magnetic field in mass spectrometer which of the following ions is fallen__________________?
A. Lighter
B. Intermediate
C. Heavier
D. Are collected at same time
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For which of the following compounds the term empirical formula cannot be applied ?
A. Nacl
B. H2o
C. Cci4
D. It can be applied to all mentioned above
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The properties of an element mosly corresponds to that isotope which has greater_________________?
A. Mass number
B. Atomic mass
C. Relative abundance
D. All of the above
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1 a.m.u =__________________?
A. 1.6 x 10-27 kg
B. 1.6 x 10-24 kg
C. 1.6 x 10-26 kg
D. 1.6 x 10-28 kg
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Which of the following are isoelectronic species ?
A. H+ h h-
B. Li+ na+ k+
C. C1- br- i
D. F- ne na+
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Molecular ions are formed by passing______________________?
A. High energy electron beam
B. ? – particle
C. X-rays
D. All of the above
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Which one is true about isotope ?
A. Same number of neutrons
B. Same mass number
C. Same physical properties
D. Same chemical properties
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Which of the following ion formation is always exothermic ?
A. Uni-negative
B. Uni-positive
C. Di-negative
D. Di-positive
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The sample of isotopes of an element which needs not to be vaporized in the vaporization chamer_________________?
A. Gas
B. Liquid
C. Volatile solid
D. All
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Avogadros number may represent_________________?
A. Volume of particles
B. Number of particles
C. Mass of particles
D. All of the above
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Word of the Day
23 Jul
Aisle
a passage between rows of seats in a building such as a church or theatre, an aircraft, or train.
طویل تنگ راستہ، نشتوں کے درمیان راستہ

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