Which of the following phrases correctly completes the sentence ‘Chemical reactions occur spontaneously……..’

Which one of the following statements about bonding is False?

Questions 41 – 43 relate to the following problem: You have a solution of 0.5 mol dm-3 sodium hydroxide. Titration of 125.0 cm3 of this solution required 30 cm3 of a hydrochloric acid solution for complete neutralisation.                                                                                             How many moles of hydrochloric acid were neutralised?

Nitrogen has an atomic number of 7. Which one of the following shows the correct electronic configuration of an atom of nitrogen?

What is the pH of a 0.15 M solution of formic acid (Ka = 1.77 x 10-4)? Give your answer to 2 d.p.  This question is worth 2 marks.

A hydrophilic compound will usually dissolve into an aqueous solvent. True or false?

Which of the following statements about orbital hybridisation is incorrect?  

Which of the following amino acids has two identical groups attached to its central carbon atom?

Which of the following compounds represents the conjugate base of the weak acid CH3COOH?

What are the skeletal manifestations of hyperparathyroidism? (2)