Glycerol as a triester present in [MP PMT 1990]
Petroleum
Kerosene
Vegetable oil and fat
Naphtha
LiAIH4 converts acetic acid into[CPMT 1977; MP PMT 1990, 92]
Astigmatism (for a human eye) can be removed by using
[CPMT 1972; MP PET/PMT 1988; CBSE PMT 1990]
Picric acid is[CPMT 1971, 80, 81; DPMT 1983;MP PMT 1990; BHU 1996]
A wave is reflected from a rigid support. The change in phase on reflection will be
[MP PMT 1990; RPMT 2002]
If two waves of same frequency and same amplitude respectively, on superimposition produced a resultant disturbance of the same amplitude, the waves differ in phase by
[MP PMT 1990; MP PET 2000]