A Level H2 Chemistry 2012 Paper 1 Answers May 2026

\[Zn + 2HNO3 → Zn(NO3)2 + H2\]

\[Sodium has a lower ionization energy than magnesium because its outermost electron is in a 3s orbital, which is farther away from the nucleus and experiences a lower effective nuclear charge compared to the 3s electrons in magnesium.\]

\[The reaction between zinc and dilute nitric acid produces hydrogen gas because zinc is more reactive than hydrogen and displaces hydrogen from the acid.\] a level h2 chemistry 2012 paper 1 answers

\[Ionization energy is the energy required to remove an electron from an isolated gaseous atom.\]

(a) Describe the preparation of ethanal from ethanol. \[Zn + 2HNO3 → Zn(NO3)2 + H2\] \[Sodium

(b) Explain why the reaction between zinc and dilute nitric acid produces hydrogen gas.

\[CO2 is a non-polar molecule because its linear geometry and symmetrical arrangement of polar C=O bonds result in a net dipole moment of zero.\] a level h2 chemistry 2012 paper 1 answers

(b) Write an equation for the reaction.