Alkyl HalidesElimination Reactions1211Choose the best answerIn the sequence C₂H₅Br →(alcoholic KOH) A →(H₂/Pt) B, compound B is:AEthanolBEtheneCEthanalDEthane Like 0 Discuss 0Share
Periodic TableShielding Effect and d-Block Contraction1212Choose the best answerAn element containing completely filled inner d-orbitals may have a smaller atomic radius than expected because d-electrons:AIncrease the number of valence electronsBShield the nuclear charge poorlyCCompletely cancel nuclear attractionDStrongly shield the outer electrons Like 0 Discuss 0Share
Atomic StructureIsotopes1213Choose the best answerAtoms of the same element having the same atomic number but different mass numbers are called:AIsothermsBIsotopesCIsobarsDElementary particles Like 0 Discuss 0Share
LiquidsAnomalous Behaviour of Water1214Choose the best answerLiquid water beneath an ice layer remains near:A0°CB4°CC−2°CD20°C Like 0 Discuss 0Share
ElectrochemistryStandard Hydrogen Electrode1215Choose the best answerThe standard reduction potential of Cu²⁺/Cu is +0.34 V relative to SHE. When Cu²⁺/Cu is connected spontaneously with SHE, the reaction at SHE is:A2H⁺ + 2e⁻ → H₂BH₂ → 2H⁺ + 2e⁻C2H⁺ + 2e⁻ → 2HDH₂ → 2H + 2e⁻ Like 0 Discuss 0Share