XiMDCAT XI Complete Chemistry Grand Test#Catalytic Properties#Transition Elements2076Choose the best answerThe energy diagram shows the same reaction with and without a catalyst. Which statement is correct?AThe forward reaction, with catalyst, is endothermicBThe enthalpy change of reaction is (E₂ − E₃)CE₄ is the activation energy for the reverse uncatalysed reactionDThe enthalpy change of reaction is reduced by using a catalyst Like 0 Discuss 0Share
BUMHS MDCAT 2025 Chemistry#Boiling Point#Liquids2077Choose the best answerWhich hydride of group VIIA has lowest boiling point? (BUMHS MDCAT 2025)AHFBHClCHBrDHI Like 0 Discuss 0Share
UHS MDCAT 2024 Chemistry#Chemical Kinetics#Rate Law2078Choose the best answerFor the elementary reaction: aA + bB → cC + dD the rate equation is:ARate = k[A][B]BRate = k[A]ᵃ[B]ᵇCRate = k[A]ᵃDRate = k[B]² Like 0 Discuss 0Share
Periodic TableIonization Energy Trend2079Choose the best answerGallium has a slightly higher first ionization energy than aluminium mainly because of:APoor shielding by the intervening 3d-electronsBGreater shielding by 4p-electronsCLower nuclear charge of galliumDA completely filled valence shell Like 0 Discuss 0Share
Chemical BondingSigma Bond Formation2080Choose the best answerHead-on overlap of two p orbitals forms a:Aσ bondBπ bondCIonic bondDMetallic bond Like 0 Discuss 0Share