The process of rusting involves reaction of iron with:Nitrogen onlyOxygen and moistureCarbon dioxideHydrogen Read Notes
Water is called a universal solvent because it:Is colorlessDissolves many substancesHas neutral pHIs tasteless Read Notes
The number of electrons in a neutral atom is equal to the number of:NeutronsProtonsIsotopesShells Read Notes
The periodic table is arranged on the basis of increasing:Mass numberAtomic numberDensityVolume Read Notes
A compound is formed when elements combine in:Any proportionFixed proportionRandom ratioEqual masses only Read Notes
The bond formed by sharing of electrons is called:Ionic bondCovalent bondMetallic bondHydrogen bond Read Notes
