Everyday Science MCQs

5120 MCQs  (Page 249 of 512)

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Which group of animals has heterogametic females?
A. Domestic fowl
B. Earthworm
C. Rabbit
D. None
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Mostly elements have fractional atomic masses because of______________________?
A. Mass of an atom itself is in fraction
B. Atomic masses are average masses of isobars
C. Atmoic masses are average masses of isotopes proportional to their relative abundance
D. Atmoic masses are average masses of isotopes
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Non flowering plants are also called plant_________?
A. Coniferous
B. Abortic
C. Green
D. None of these
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Benzene gives mainly_________?
A. Addition reaction
B. Substitution reactions
C. Halogenation
D. All of these
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The Chemical Formula of Sand is___________?
A. Si2o3
B. Sio2
C. Al2o3
D. Sr2o
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Which of the following can be separated by ” Sublimation Method”?
A. Sand and iron filing
B. Sand and naphthalene
C. Both a & b
D. None
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Why do we determined the boiling point of a liquid?
A. To check its acidity and basicity
B. To check temperature
C. To check its purity and nature
D. None of these
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Why does Ethyl Alcohol show high boiling point then Acetone?
A. Due to hydrogen bonding
B. Due to high molecular weight
C. Due to its acidic nature
D. Due to its low molecular weight
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The Boiling Point of Ethyl Alcohol is_________?
A. 78°c
B. 58°c
C. 73°c
D. 56°c
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The process in which solid changes directly into vapours without passing through liquid state?
A. Decantation
B. Sublimation
C. Evaporation
D. None
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Word of the Day
24 Jul
Untenable
(especially of a position or view) not able to be maintained or defended against attack or objection.
ناقابل مدافعت، غیر مستحکم، جو دلیل سے ثابت نہ ہو سکے

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