A.Bluish, transparent
B.Dark blue to reddish-yellow
C.Yellow-red to red
D.Dark red
E.Colour of exhaust flame has nothing to do with the mixture composition
A.nationalised banks
B.financial corporations
C.stock exchanges
D.non-nationalised banks
A.its nucleus goes from a higher energy state to a lower one
B.one of the orbital electrons jumps from a higher orbit to one of a lower energy
C.an orbital electron jumps from a lower orbit to a higher one
D.its nucleus goes from a lower energy state to a higher one
A.Octane number
B.Cetane number
C.iso-octane number
D.heptane number
A.Cottonseed
B.Saw dust
C.Graphite
D.Rubber scrap
A.Zero
B.One
C.Two
D.Three
E.Four
A.10?
B.15?
C.30?
D.45?
A.To increase the power output of engine
B.To reduce specific fuel consumption
C.To reduce the noise of engine
D.To improve cooling of cylinders
E.None of the above
A.move round the nucleus at random
B.are embedded in space around the nucleus
C.are distributed as three dimensional charge clouds around the nucleus
D.are stationary in various energy levels
A.1 atom per unit cell
B.2 atoms per unit cell
C.3 atoms per unit cell
D.4 atoms per unit cell
