Biology & Chemistry CBT Exam Biology & Chemistry CBT Exam Submit Exam {q:"21. Gas for respiration?", options:["CO2","Oxygen","Nitrogen","Hydrogen"], answer:1}, {q:"22. Noble gas?", options:["Oxygen","Nitrogen","Helium","Carbon"], answer:2}, {q:"23. Salt?", options:["HCl","NaCl","NaOH","H2SO4"], answer:1}, {q:"24. Separate salt from water?", options:["Filtration","Evaporation","Decantation","Chromatography"], answer:1}, {q:"25. Not state of matter?", options:["Solid","Liquid","Gas","Energy"], answer:3}, {q:"26. Basic unit of life?", options:["Tissue","Organ","Cell","System"], answer:2}, {q:"27. Pumps blood?", options:["Brain","Heart","Lungs","Liver"], answer:1}, {q:"28. Gas…
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