Alluvial soils are rich in:
A.K2O, P2O5 and Lime
B.N
C.Fe, A1
D.Si, Cu
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The boiling range of petrol is:
A.30 to 180?C
B.30 to 200?C
C.30 to 230?C
D.30 to 250?C
Ecosystem creates:
A.Food chains
B.Food web
C.Both (a) & (b)
D.None of the above
The square engine has:
A.Cylinder of square section
B.Combustion chamber of square section
C.Equal bore and stroke
D.Piston of square section
Ecological pyramids are of:
A.Two types
B.Three types
C.Four types
D.Five types
Bengal famine was caused due to:
A.Phytophthora infestans
B.Drechslera oryzae
C.Puccinia graminis tritici
D.Heterodera avenage
The first IC engine was invented in the year:
A.1876
B.1890
C.1900
D.1905
The thermal efficiency of CI engine is:
A.Higher than SI engine
B.Lower than SI engine
C.Equal to SI engine
D.None of these
Fore-gut is lined internally by:
A.Peritrophic membrane
B.Epithelial membrane
C.Intima
D.Taenidia
Ammonium sulphate contain approximately:
A.10% nitrogen
B.20% nitrogen
C.28% nitrogen
D.36% nitrogen
