A precipitated substance must be ______________ .
A. Completely soluble
B. Chemically unreactive
C. Slightly soluble
D. Completely insoluble
Answer: A
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why is it necessary to wash a precipitate after filtration ?
A. To dissolve and reprecipitate the precipitate
B. To minimize peptization
C. To remove any co-precipitated impurities
D. To bring the precipitate to a form suitable for weighing
Answer: C
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The excited state of an atom or molecule is a ___________ .
A. Lower energy state
B. Ground state
C. Higher energy state
D. Diminished energy state
Answer: C
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Source - Monochromator- Sample container - Detector - Read out, is a schematic layout of a ______________ .
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__________ is a process by which the particles of a precipitate revert to the colloidal state .
A. Coprecipitation
B. Low relative supersaturation
C. Digestion
D. Peptization
Answer: D
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___________ is a form of gravimetric analysis whereby the substance to be determined is separated in a gas form from the remainder of the sample .
A. Volatilization gravimetry
B. Combustion gravimetry
C. Gas phase gravimetry
D. Precipitation gravimetry
Answer: A
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The visible region range from ____________.
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________ can be prepared by combining calculated quantities of a suitable conjugate acid - base pair .
A. Acid-base indicator
B. Buffer solution
C. Ionization constant
D. Buffer capacity
Answer: B
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In spectroscopy, the concentration of an analyte is a function of ____________ .
A. The amount of radiation emitted when electromagnetic radiation is directed at the analyte in solution
B. Amount of radiation absorbed when electromagnetic radiation is directed at the analyte in solution
C. Amount of radiation reflected when electromagnetic radiation is directed at the analyte in solution
D. Amount of radiation deflected when electromagnetic radiation is directed at the analyte in solution
Answer: B
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The name of the instrument used in spectrometry for analysis is called ________.
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