LiquidsHydrogen Bonding and Volume Contraction2941Choose the best answerWhen 50 mL ethanol is mixed with 50 mL water, the final volume may be less than 100 mL mainly because of:AVapour pressureBHydrogen bondingCBoilingDChemical reaction Like 0 Discuss 0Share
Atomic Structure STBAtomic Structure MCQs (STB)#Atomic Structure#Flame Tests2942Choose the best answerWhich substance is commonly responsible for a bluish-green colour in fireworks?ABarium saltsBStrontium saltsCCopper compoundsDSodium salts Like 1 Discuss 0Share
UHS MDCAT 2025 Chemistryuhs mdcat chemistry 2025#Coinage Metals#Transition Elements2943Choose the best answerWhich of the following is a coinage metal?APdBCuCCdDHg Like 0 Discuss 0Share2
Atomic Structure STBAtomic Structure MCQs (STB)#Atomic Structure#Hydrogen Spectrum2944Choose the best answerWhat is the approximate SI value of the Rydberg constant?A1.09678 × 10⁷ m⁻¹B1.09678 × 10⁶ m⁻¹C1.09678 × 10⁵ m⁻¹D1.09678 × 10⁹ m⁻¹ Like 0 Discuss 0Share
Alcohols and PhenolsOxidation of Alcohols2945Choose the best answerConversion of ethanol to ethanal is classified as:AReductionBOxidationCAdditionDHydrolysis Like 0 Discuss 0Share