Big Fat End of AS Chem Quiz

What is the electron configuration of K+

• 1s² 2s² 2p⁶ 3s²

• 1s² 2s² 2p⁶ 3s² 3p²

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²

• 1s² 2s² 2p⁶ 3s² 3p⁶

What type of structure does potassium chloride have?

• Giant ionic lattice

• Metallic bonding

• Giant covalent structure

• Simple Covalent molecule

What is a dipole?

• A difference in charge between 2 atoms caused by a shift in electron density

• A similarity in charge between 2 atoms caused by a shift in electron density

• A weak intermolecular force

• An element with high electron density

Which is the most electronegative element?

• Carbon

• Fluorine

• Oxygen

• Chlorine

A strong acid...

• completely dissociates H⁺

• partially dissociates H⁺

• partially joins H⁺

• completely joins H⁺

A weak acid...

• completely dissociates H⁺

• partially dissociates H⁺

• partially joins H⁺

• completely joins H⁺

When added to an acid, methyl orange changes from orange to...

• colourless

• yellow

• pink

• blue

What mass of sodium carbonate is needed to make 250cm³ of 0.300moldm^-3 of sodium carbonate solution?

• 0.02g

• 7.95g

• 5.30g

• 120g

Pick the redox reaction

• HCl + NaOH ==> NaCl + H₂O

• NaCl + AgNO₃ ==> AgCl + NaNO₃

• BaBr₂ + H₂S ==> BaS + 2HBr

• N₂ + O₂ ==> 2NO

proton has the mass of..

• an electron

• a neutron

• nucleus

• 1/12 of a carbon-12 atom