PHARMACEUTICAL CHEMISTRY MCQS (71-84)

 THESE ARE VERY IMPORTANT MCQS IN PHARMACIST COMPETITIVE EXAMS

71.The error due to impurities in chemicals and solvents is

A.Instrumental error

B.Operative error

C.Chemical error

D.None

72.Closeness of measurements to the true value is

A.Precision

B.Standard deviation

C.Accuracy

D.Bias

73.The difference between the experimental mean and a true value is known as

A.Error

B.Relative error

C.Absolute error

D.None

74.The deviation of data from its mean is generally described by the 

A.Average

B.Standard deviation

C.Precision

D.Accuracy

75.The reproducability of results of a number of experiments is generally known as

A.Precision

B.Bias

C.Accuracy

D.Closelessness

76.Commercial copper sulphate generally contains -as an impurity

A.Iron

B.Lead

C.Arsenic

D.Sulphate

77.Sodium metal is stored in

A.Water

B.Alcohol

C.Kerosene

D.Ether

78.The standard solution in limit test for chloride is made with

A.Nacl2

B.Kcl2

C.Bacl2

D.Cacl2

79.Barium sulphate reagent contains

A.Barium sulphate

B.Sulphate free alcohol

C.Potassium sulphate

D.All the above

80.In limit test for sulphate,which prevents the supersaturation of barium sulphate?

A.Barium sulphate

B.Alcohol

C.Potassium sulphate

D.None

81.All the reagents for limit test for arsenic are labelled as

A.FeT

B.AsT

C.PbT

D.None

82.Physico-chemical parameter prescribed in pharmacopeia for barium sulphate is

A.Bulkiness

B.Swelling power

C.Coarse particles

D.Absorption power

83.Lead acetate wool is used in the arsenic limit test to absorb

A.Arsenious hydride

B.Sulphurdioxide

C.Hydrogen sulphide

D.Hydrogen chloride

84.Official limit test for arsenic in magnesium oxide is

A.10 ppm

B.7 ppm

C.5 ppm

D.3 ppm

Answer key

71.C  72.C  73.C  74.B  75.A  76.A 77.C  78.A  79.D  80.B  81.B  82.A  83.C 84.C