Practice Questions

TLS Online TPP Program

#Question id: 101

You have two bottles, each of which contains a white, crystalline substance. Your lab director tells you that one contains lactose and the other sucrose. Your job is to determine which bottle contains which sugar. Which procedure would you use?

#I Life Science/ Life Sciences Group – I-V

Test both for solubility in water. Sucrose is very soluble; lactose is only minimally soluble.
Test for the ability to reduce Ag+. Only lactose will react.
Dissolve each in water and record the pH. Lactose is far more acidic than sucrose.
React each with bromine (Br2) water. Only sucrose will react.

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TLS Online TPP Program

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TLS Online TPP Program

#Question id: 6977

#I Life Science/ Life Sciences Group – I-V

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TLS Online TPP Program

#Question id: 1623

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TLS Online TPP Program

#Question id: 27799

#Research Methodology

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TLS Online TPP Program

#Question id: 2098

#I Life Science/ Life Sciences Group – I-V

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