The maximum level of lead allowed in drinking water is 15 mg/kg. What is this co

Question

The maximum level of lead allowed in drinking water is 15 mg/kg. What is this concentration in units of parts per million?

Question 35 options:

A flask contains two compartments (A and B) with equal volumes of solution separated by a semipermeable membrane. Which diagram represents the final level of the liquids when A is initially a 10% (w/v) glucose solution and B is initially a 20% (w/v) glucose solution?

Question 36 options:

a) 15 ppm b) 1.5 102
ppm c) 1.5 104
ppm d) 3.1 ppm The maximum level of lead allowed in drinking water is 15 mg/kg. What is this concentration in units of parts per million? Question 35 options: A flask contains two compartments (A and B) with equal volumes of solution separated by a semipermeable membrane. Which diagram represents the final level of the liquids when A is initially a 10% (w/v) glucose solution and B is initially a 20% (w/v) glucose solution? Question 36 options:

Explanation / Answer

1. 1 ppm = 1 mg/Kg

So, 15 mg/kg = 15 ppm

Option a) is correct.

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2. A has 10% and B has 20%

So, B is more concentrated.

So, during osmosis, the solvent moves from low concentration to high concentration.

so, liquid moves from A to B.

So, volume of A will be less than volume of B finally.

So, option A is correct

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