Chemical BondingUnpaired Electrons896Choose the best answerThe number of unpaired electrons in NH₃ is:A0B1C3D4 Like 0 Discuss 0Share
LiquidsHydrogen Bonding in Biomolecules897Choose the best answerThe two strands of a DNA double helix are held together mainly by:AHydrogen bondingBIonic bondingCMetallic bondingDCovalent bonds between the two strands Like 0 Discuss 0Share
Chemical EquilibriumSolubility Product898Choose the best answerFor a sparingly soluble salt, the solubility product (Ksp) is mainly used to predict:ARate of dissolutionBWhether precipitation will occurCHeat of solutionDColour of the salt Like 1 Discuss 0Share
Atomic Structure STBAtomic Structure MCQs (STB)#Hydrogen Isotopes#Isotopes899Choose the best answerIdentify the hydrogen isotope that contains no neutron.ADeuteriumBTritiumCProtiumDAll hydrogen isotopes contain neutrons Like 0 Discuss 0Share1
Chemical BondingMolecular Geometry and Polarity900Choose the best answerCO₂ and SO₂ are both triatomic, but CO₂ is non-polar while SO₂ is polar because:ACO₂ is bent while SO₂ is linearBCarbon always forms non-polar bondsCCO₂ contains no polar bondsDCO₂ is linear while SO₂ is bent Like 0 Discuss 0Share