4.Which of the following is not a traditional irrigation method?(1 Point)( a)Moat( b) Chain pump( c)Lever SYSTEM(d)Drip system5.Weeds are controlled by chemicals called _________.(1 Point)( a)Pesticides(b)Fungicides(c)Weedicides(d)Insecticides6.Arrange the following agricultural practices in the order in which they are followed.1. Harvesting2. Sowing3. Storage4. Irrigation5. Preparation of soil(1 Point)( a) 1→2→3→4→5( b) 5→2→4→1→3( c) 2→1→3→5→4(d) 5→3→4→1→27.Identify the agricultural method in which different crops are grown on a piece of land season after season.(1 Point)( a) Irrigation( b) MONOCULTURE( c) Crop rotation(d) Shifting cultivation8.Rhizobium bacteria in the root nodules of leguminous plants help in fixing:(1 Point)( a) Sulphur( b) Oxygen( c) Nitrogen( d) Hydrogen9.Wheat and GRAM belong to(1 Point)(a) Rabi crops(b) Kharif crops(c) Both of these(d) None of these10.The process of separating grains from chaff is known as:(1 Point)( a) Threshing( b) Harvesting( c) Tilling( d ) Transplantation11.The disease caused by protozoa is(1 Point)(a) tuberculosis(b) polio(c) TYPHOID(d) malaria12.Which bacteria helps in settling of curd?(1 Point)(a) Rhizobium(b) Lactobacillus(c) Vibriocholarae(d) Bacillus13.What helps in the rise of bread or dosa dough?(1 Point)(a) Heat(b) Grinding(c) Growth of yeast cells(d) Low pressure14.Vaccine for small pox is discovered by(1 Point)(a) Louis Pasteur( b) Alexander Fleming( c) Edward Jenner( d) John Mendal15.Amount of nitrogen in the atmosphere is(1 Point)(a) 58%( b) 68%( c) 78%( d) 88%16.In order to take precautionary steps to control DENGUE , we must take measures to stop the breeding of:(1 Point)( a) Aedes MOSQUITO(b) Fleas( c) Fire ants( d) Anopheles mosquito17.Which of the following is a communicable disease?(1 Point)( a) Diabetes( b) Chicken pox( c) Alzheimer’s( d) Cancer18.The metal which is liquid at room temperature is(1 Point)(a) sodium(b) bromine(c) calcium(d) mercury19.Name the gas evolved when magnesium reacts with dilute hydrochloric acid(1 Point)(a) Chlorine(b) Oxygen(c) hydrogen(d) Nitrogen20.Materials having qualities of both metals and non-metals are(1 Point)(a) Elements(b) metalloids(c) noble metals(d) none of these21.A reaction in which a more reactive metal replaces a less reactive metal from its salt solution is called a________ reaction.(1 Point)(A.) combination(B. ) displacement(C). double displacement(D.) addition22.When sulphur reacts with oxygen, the oxide formed is ___ in nature.(1 Point)(A.) alkaline(B.) neutral(C.) basic( D.) acidic23.The property by which metals can be beaten into sheets is known as ___(1 Point)( A.) ductility( B.) sonority( C.) lusture(D.) malleability