0.01% salt in water = 100 ppm salt in water ( e) 1 gram salt in 1 L of water= 1

Question

0.01% salt in water = 100 ppm salt in water ( e) 1 gram salt in 1 L of water= 1 % Which of the following measurements must be performed in the field or analyzed Immediately (means less than 15 min) after sampling except: Temperature pH Dissolved oxygen (DO) with probe method Conductivity Which of the following sampling container is NOT correct for the specified parameter: BOD bottle rightarrow DO plastic container rightarrow Metals plastic container Volatile organic compounds sterile container (plastic or glass) rightarrow Fecal coliform

Explanation / Answer

20. Conductivity of the sample solution remains the same even after 15 mins of sampling.

So, there is no need to analyse this parameter immediately.

Hence, the exception is (d) conductivity.

21. Volatile organic compounds can easily corrode the plastic. So, they cannot be kept in plastic containers.

Hence, the correct not correct combination is (c) plastic container-volatile organic compounds.

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