Pharmaceutical Analysis 01

In volumetric analysis, the basis of analyte concentration is

• Volume

• Concentration

• Weight

• Both A and B

Volumetric Analysis is a

• Qualitative method

• Quantitative method

• Semi quantitative method

• Both A and B

Stiochiometric end point is

• the point at which the color change is shown by the indicator

• the point at which the reaction between titrant and titrate is just complete

• the point at which equal volume of titrant and titrate reacts

• Both A and B

The number of significant digits in 0.032 is

• 1

• 2

• 3

• 4

The number of significant digits in 410.00720 is

• 5

• 6

• 7

• 8

An analyst measures the volume of a solution as 8.89ml, but the actual volume is 10ml. Calculate the absolute error and relative error. (Relative error = Absolute error/standard value)

• 0.11 and 0.111

• 0.11 and 0.011

• 1.11 and 0.011

• 1.11 and 0.111

A person unable to judge the lower meniscus of burette at the endpoint during the titration comes under

• Error of the method

• Instrumental error

• Personal error

• Reagent error

Pure water contains

• water molecules only

• hydroxide ions only

• hydronium ions only

• water molecules, hydronium ions and hydroxide ions

If [H3O]+ ions of a solution is less than OH- ions, the solution is

• always acidic

• always basic

• always neutral

• may be acidic, basic or neutral

The pH scale in general uses ranges from

• 0 to 1

• -1 to +1

• 0 to 7

• 0 to 14