11. For each of the following compounds, draw its isomeric pair that represents a chain, positional and functional group isomerism: (a) CH3CH2CH=CH2 (b) CH3CH(CH3)CH(CH3)CH3 (c) CH3CH2CH2CH2CH2OH

Weighted average if these values Value-7.00, 8.00, 9.00 Weight-75.0%, 15.0%, 10.0%

How thick is the Nernst diffusion layer? a. 10 - 100 mm b. 10 - 100 cm c. 10 - 100 Å d. 10 - 100 µm e. 10 - 100 nm

1. Which of the following is not a step in preparing a water sample container?a. All sample containers must be dark in colorb. The type of sample container and the level of cleaning required depend on the type of sample to be takenc. All sample containers must be thoroughly cleaned in the laboratory before sampling is carried outd. The number of containers prepared must always be in excess of what is needed, for quality assurance, quality control and reserves 2. The purpose of environmental sample analysis is..a. To determine the origin and concentration of chemicals in the environmentb. To determine the origin, concentration of chemicals and/or pollutants in the environmentc. To determine the concentration of a chemical in the environmentd. To determine the cause and concentration of pollutants in the environment

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