Engineering :: Instrumentation and Process Control

@ : Home > Chemical Engineering > Instrumentation and Process Control

81.

If pH = 5 then [H+] in moles/litre is

A.	5 x 10-1	B.	0.0005
C.	6 x 10-5	D.	0.00001

82.

The solution will be alkaline when pH is

A.	less than 7	B.	equal to 7
C.	greater than 7	D.	less than or equal to 7

83.

The solution will be acidic when

A.	pH > 7	B.	pH = 7
C.	pH ? 7	D.	pH < 7

84.

pH of perfect neutral solution is

A.	7	B.	5
C.	0	D.	1

85.

If the pH of a solution changes by 1 unit the corresponding change in the hydrogen ion concentration of the solution is

A.	2.3 times	B.	10 times
C.	23 times	D.	100 times

86.

Polarograph is used for the analysis of

A.	solids	B.	liquids
C.	gases	D.	liquids and gases

87.

Composition of CO2 is the flue gas is determined by

A.	polarograph	B.	mass spectrometer
C.	thermal conductivity cell	D.	polarimeter

88.

Amount of moisture in air is determined by

A.	refractometer	B.	polarimeter
C.	hygrometer	D.	polarograph

89.

Composition of alloys is commonly determined by

A.	thermal conductivity cell	B.	mass spectrometer
C.	polarograph	D.	polarimeter

90.

Flow rate of sludge is commonly determined by

A.	orifice meter	B.	venturi meter
C.	open weir	D.	rotameter