Question Detail Who proposed first atomic theory ? E.RutherfordDe BroglieJohn DaltonD.I.Mendeleef Answer: Option C Ad Similar Questions : 1. Which one is an organic Acid ? SulphuricCitricNitricPhosphoric Answer: Option B 2. What is used to avoid melting of ice ? GelatineButaneMethaneAny acid Answer: Option A 3. A catalyst is a substance which increases the activation energyincreases the rate of reaction and increases the equilibrium concentration of productschanges the equilibrium of a reaction so that the concentration of the product increaseshastens the attainment of equilibrium Answer: Option D 4. What is the hardest form of carbon ? cokegraphitecharcoaldiamond Answer: Option D 5. The cyclotron is used to accelerating particlesseparating elementspurifying metalsmaking alloys Answer: Option A Read more from - Chemistry Questions Answers