Questions asked by Sana Z.
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How will you obtain benzene from ethyl alcohol ?
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Why is phenol more soluble in water than toluene ?
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How can nucleophilic addition of a primary amine give an imine ?
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Why tertiary alkyl halides give #"S"_"N"1# reactions mostly ?
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Why group 1 elements are also called alkali metals ?
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What is the difference between oxides , peroxides and superoxides ?
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What is the wavelength range of the ordinary infrared region ?
a.0.8-2.5 μm
b. 2.5-16 μm
c. 16-1000 μm
d. 400-800 nm
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Which region of the electromagnetic spectrum is involved in mass spectroscopy ?
a. visible.
b. radiowave
c. microwave
d. none of these
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Mass spectroscopy is an analytical technique which involves ?
a. production of gaseous ions from a sample
b. separation of the gaseous ions
c. measurement of the relative abundance of the gaseous ions
d. all of the above
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Far ultraviolet region generally lies between?
a. 10-200 nm
b. 200-400 nm
c. 400-750 nm
d. 300-500 nm
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If 'g' is the acceleration due to gravity on earth then increase in P.E of a body of mass 'm' up to a distance equal to the radius of earth from the earth surface will be ?
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What is the relation between kinetic energy and momentum ?
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Why can't the essential amino acids be produced in the body even though they are coded by the DNA?
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Why most fatty acids have even number of carbon atoms?