Question 1An organic compound containing 40.0% carbon, 53.33% oxygen and 6.67% hydrogen has an empirical formula ofA.C2H4O2B.C2H3O2C.CH2OD.CH3OObjective Show full explanation
Question 2The general formula of alkanones is A.RCHOB.R2COC.RCOOHD.RCOORObjective Show full explanation
Question 3How many isomers can be formed from organic compounds with the formula C2H2OA.2B.3C.4D.5Objective Show full explanation
Question 4What is the formula of soduim gallate if gallium(Ga) shows an oxidation number of +3A.NaGaO3B.Na2Ga(OH)3C.NaGa(OH)3D.NaGa(OH)4Objective Show full explanation
Question 5A man suspected of being drunk is made to pass his breath into acidified potassium dichromate solution. If his breath carries a significant level of ethanol, the final colour of the solution is A.PinkB.PurpleC.GreenD.Blue-blackObjective Show full explanation
Question 6Which of the following is used in the manufacture of bleaching powder? A.Sulphur dioxideB.Chlorine C.Hydrogen sulphideD.Nitrogen dioxideObjective Show full explanation
Question 7Complete hydrogenation of ethyne yields A.Benzene B.MethaneC.EthaneD.EtheneObjective Show full explanation
Question 8The movement of liquid molecules from the surface of the liquid to the gaseous phase above it is known as A.Brownian movement B.Condensation C.Evaporation D.Liquefaction Objective Show full explanation
Question 9An element X has 127 neutrons and 82 electrons. Its atomic number isA.209B.105C.45D.82Objective Show full explanation
Question 10Which of the following substances is a mixture? A.Sulphur powderB.BronzeC.Distilled waterD.EthanolObjective Show full explanation