Dilution

One unit of solution A combined with 99 units of solution B equal to:

• 1 ppt

• 10 %

• 1 ppm

• 1 %

One gram of powder A combined with 99 ml of solution B equal to:

• 1 % w/v

• 1 % v/v

• 1 % w/w

• 1 % v/w

One unit of solution A added to 999 units of solution B equal to:

• 1 ppt

• 10 percent

• 1 ppm

• 1 percent

One unit of solution A added to 999 units of solution B equal to:

• 0.1 %

• 10 %

• 1 %

• 0.01 %

Which are incorrect if one unit of solution A added to 999 units of solution B equal to:

• 1 ppt

• 10 %

• 0.1 %

• 0.001

Which are incorrect regarding 1 ppm

• 0.001 ppt

• 0.0001 %

• 0.1 %

• 0.000001

20 unit of solution A combined with 80 units of solution B equal to:

• 0.25 v/v

• 0.2 v/v

• 0.25 w/v

• 0.2 w/v

20 unit of solution A added in 80 units of solution B equal to:

• 25% of A in B

• 25% of B in A

• 20% of A in B

• 20 % of B in A

20 unit of solution A in 80 units of solution B equal to:

• 1/5 of A in B

• 1/4 of B in A

• 1/4 of A in B

• 1/5 of B in A

20 unit of solution A in 80 units of solution B equal to:

• 1:5 of A in B

• 1:4 of B in A

• 1:4 of A in B

• 1:5 of B in A