paper-1a – Page 7

M25-CHEM-HL-TZ2-P1A-Q18

What is the correct interpretation of an energy profile where the potential energy of the products is higher than the

What is the standard enthalpy change of combustion, \( \Delta H_{combustion}^{\ominus} \), according to the following data? Amount of fuel

What is the coefficient of oxygen when the equation for the complete combustion of ethanol is balanced using the smallest

Which change results in a decrease in entropy?

Which value indicates an equilibrium reaction?

Which part of the periodic table contains elements which are likely to form acidic oxides only?

What is the oxidation state of nitrogen in \( N_2O_4 \)?

Which properties are typical of transition elements? I. Low melting points II. Formation of coloured compounds III. Variable oxidation states

What is the electron configuration of the \( Cr^{2+} \) ion?

Why do group 17 elements have higher first ionization energies than group 1 elements in the same period?