LiquidsAnomalous Behaviour of Water2421Choose the best answerIn a frozen lake, the relatively warm liquid water near the bottom is approximately:A10°CB4°CC0°CD−4°C Like 0 Discuss 0Share
SINDH MDCAT 2018 Chemistry#Electrochemistry#Electrolysis2422Choose the best answerWhen electricity is passed through water in the presence of an acid oxygen and ________ is produced. (Sindh MDCAT 2018)ACarbonBCOCCO₂DHydrogen Like 0 Discuss 0Share
MDCAT Chemistry Paper 2025#Electrochemistry#Standard Hydrogen Electrode2423Choose the best answerWhen SHE is connected with Cu electrode using salt bridge and external wire: (IBA MDCAT 2025)ACu reducesBCu²⁺ reducesCH⁺ reducesDH₂ reduces Like 3 Discuss 0Share
Stoichiometry 11#Physical and Chemical Changes2424Choose the best answerWhich process represents only a physical change?ARusting of ironBCombustion of magnesium ribbonCBurning of candleDMelting of wax Like 0 Discuss 0Share
Alkyl HalidesStructure and Reactivity of Grignard Reagents2425Choose the best answerThe carbon atom bonded to magnesium in a Grignard reagent behaves as:AElectrophilic carbonBNucleophilic carbonCNeutral carbonDPositively charged carbon Like 0 Discuss 0Share