Question Detail Which of the following elements behave chemically both as a metal and a non metal? BoronCarbonArgonMercury Answer: Option A Ad Similar Questions : 1. Who proposed first atomic theory ? E.RutherfordDe BroglieJohn DaltonD.I.Mendeleef Answer: Option C 2. How many different oxides are formed by nitrogen ? twothreefourfive Answer: Option A 3. Air is a compoundcolloidelementmixture Answer: Option D 4. Oil of vitriol is nitric acidsulphuric acidhydrochloric acidphosphoric acid Answer: Option B 5. Which of the following gases is the most toxic? Carbon dioxideSulphur dioxideCarbon monoxideAcetic acid Answer: Option C Read more from - Chemistry Questions Answers